Supplement, food, and botanical reference

Function: Supports collagen structure and acts as an inhibitory neurotransmitter; also participates in glutathione and creatine synthesis.

Natural sources: Gelatin, collagen-rich cuts of meat, bone broth, poultry skin, fish skin, legumes.

Sources: Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Precursor for nitric oxide, which helps regulate blood-vessel tone and blood flow.

Natural sources: Turkey, chicken, pork loin, pumpkin seeds, peanuts, soybeans, lentils.

Sources: Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Tea amino acid associated with relaxed alertness and modulation of excitatory neurotransmitter signaling.

Natural sources: Green tea, black tea, white tea, matcha, some mushrooms.

Sources: Effects of L-Theanine Consumption on Sleep Outcomes: A Systematic Review and Meta-Analysis (2026-07-26), Effects of L-Theanine on Stress-Related Symptoms and Cognitive Functions in Healthy Adults (2026-07-26), FoodData Central (2026-07-23)

Function: Essential branched-chain amino acid involved in muscle protein synthesis signaling.

Natural sources: Whey protein, Greek yogurt, eggs, beef, chicken, tuna, soy foods.

Sources: Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Sulfur-containing amino acid derivative involved in bile acid conjugation, osmoregulation, and excitable tissues such as heart and retina.

Natural sources: Shellfish, dark-meat poultry, fish, beef, dairy in smaller amounts.

Sources: Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Converted to arginine and may support nitric oxide production more efficiently than arginine for some uses.

Natural sources: Watermelon, cucumber, pumpkin, squash, gourds.

Sources: Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Cofactor in mitochondrial energy metabolism and antioxidant recycling pathways.

Natural sources: Spinach, broccoli, tomatoes, Brussels sprouts, organ meats.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Carotenoid pigment that helps protect lipids and cell membranes from oxidative stress.

Natural sources: Salmon, trout, krill, shrimp, crab, microalgae such as Haematococcus pluvialis.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Supports mitochondrial electron transport and functions as a lipid-soluble antioxidant.

Natural sources: Organ meats, beef, sardines, mackerel, peanuts, soybean oil.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Major intracellular antioxidant involved in detoxification enzymes and redox balance.

Natural sources: Asparagus, avocado, spinach, okra, broccoli, garlic, onions.

Note: Dietary glutathione and glutathione-supporting foods are not the same as high-dose glutathione supplementation.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Carotenoids concentrated in the macula of the eye, where they filter blue light and support retinal antioxidant defenses.

Natural sources: Kale, spinach, collards, turnip greens, corn, egg yolks, pistachios.

Sources: AREDS/AREDS2 Clinical Trials (2026-07-26), Vitamin A and Carotenoids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Cysteine donor used by the body to make glutathione.

Natural sources: No meaningful natural food source as NAC; cysteine is found in poultry, eggs, yogurt, legumes, and oats.

Note: NAC is a supplement form, not a common intact food compound.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Polyphenol studied for effects on cellular stress-response and inflammatory signaling pathways.

Natural sources: Red grapes, grape skins, red wine, peanuts, pistachios, some berries.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Curcuminoid polyphenols influence inflammatory and antioxidant signaling pathways.

Natural sources: Turmeric root, turmeric powder, curry blends containing turmeric.

Note: Curcumin absorption varies widely by formulation and meal context.

Safety flags: blood thinners, bleeding risk, surgery, gallbladder disease, pregnancy/breastfeeding, liver disease

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Flavonol that contributes to plant antioxidant activity and is studied for immune and vascular signaling effects.

Natural sources: Onions, capers, apples, berries, kale, tea.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Isothiocyanate that activates cellular antioxidant-response enzymes through Nrf2-related pathways.

Natural sources: Broccoli sprouts, broccoli, Brussels sprouts, cabbage, kale, mustard greens.

Sources: FoodData Central (2026-07-23), Choline Fact Sheet for Health Professionals (2026-07-23)

Function: Natural sweetener containing sugars plus small amounts of polyphenols and organic acids.

Natural sources: Honey produced by bees from flower nectar.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Resinous bee product rich in plant phenolics; traditionally used for oral and throat comfort.

Natural sources: Bee propolis collected from tree and plant resins.

Note: Avoid with bee-product allergy.

Safety flags: bee-product allergy, pollen allergy, pregnancy/breastfeeding

Sources: Efficacy and Safety of Propolis for Treating Recurrent Aphthous Stomatitis: Systematic Review and Meta-Analysis (2026-07-26), Applications of Propolis in Dentistry: A Review (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Mixture of flower pollen, nectar, and bee secretions that provides small amounts of amino acids, lipids, and polyphenols.

Natural sources: Bee-collected flower pollen.

Note: Can trigger allergic reactions in sensitive people.

Safety flags: bee-product allergy, pollen allergy, pregnancy/breastfeeding

Sources: Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Bee secretion containing proteins, sugars, fatty acids, and trace compounds; mostly used as a traditional supplement ingredient.

Natural sources: Royal jelly produced by worker bees.

Note: Can trigger allergic reactions in sensitive people.

Safety flags: bee-product allergy, asthma/allergy, pregnancy/breastfeeding

Sources: Royal Jelly: Biological Action and Health Benefits (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Provide amino acids and peptides associated with collagen-rich tissues such as skin, tendon, ligament, and cartilage.

Natural sources: Gelatin, bone broth, skin-on poultry, fish skin, slow-cooked connective tissue.

Safety flags: allergy, kidney disease

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Amino sugar used in glycosaminoglycan synthesis in cartilage and connective tissue.

Natural sources: Shellfish shells are the common supplement source; meaningful amounts are not typically obtained from ordinary foods.

Sources: Evaluation of Efficacy and Safety of Glucosamine Sulfate, Chondroitin Sulfate, and Their Combination in Knee Osteoarthritis (2026-07-26), Clinical Efficacy and Safety of Chondroitin Combined With Glucosamine in Knee Osteoarthritis (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Sulfated glycosaminoglycan that contributes to cartilage structure and water retention.

Natural sources: Animal cartilage, bone broth in variable amounts, supplements commonly sourced from bovine, porcine, chicken, or marine cartilage.

Sources: Evaluation of Efficacy and Safety of Glucosamine Sulfate, Chondroitin Sulfate, and Their Combination in Knee Osteoarthritis (2026-07-26), Clinical Efficacy and Safety of Chondroitin Combined With Glucosamine in Knee Osteoarthritis (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Organic sulfur compound studied for joint comfort and oxidative-stress markers.

Natural sources: Small variable amounts in fruits, vegetables, grains, milk, tea, and coffee.

Sources: Meta-Analysis of Dimethyl Sulfoxide and Methylsulfonylmethane in Knee Osteoarthritis (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Supports rapid ATP recycling through the phosphocreatine system in muscle and brain tissue.

Natural sources: Beef, pork, salmon, tuna, herring, cod.

Safety flags: kidney disease, pregnancy/breastfeeding, complex medical conditions

Sources: Choline Fact Sheet for Health Professionals (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Support NAD-related cellular energy and repair pathways; supplement forms include niacin, nicotinamide riboside, and nicotinamide mononucleotide.

Natural sources: Niacin-rich foods such as poultry, fish, peanuts, mushrooms, brown rice, and fortified grains.

Note: NAD+ itself is not generally treated as a practical food nutrient target.

Sources: Choline Fact Sheet for Health Professionals (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: NAD+ precursor studied for cellular energy metabolism and aging-related biomarkers.

Natural sources: Edamame, broccoli, cabbage, cucumber, avocado in small amounts.

Sources: Choline Fact Sheet for Health Professionals (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Supports acetylcholine synthesis, cell membranes, and methylation pathways.

Natural sources: Egg yolks, beef liver, salmon, chicken, soybeans, Brussels sprouts.

Note: Choline also belongs in the nutrient grid when DRI values are shown.

Sources: Choline Fact Sheet for Health Professionals (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Cell-membrane phospholipid concentrated in brain tissue and studied for memory and attention contexts.

Natural sources: Soy lecithin, white beans, egg yolk, fish, organ meats.

Sources: Choline Fact Sheet for Health Professionals (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Provides EPA and DHA, long-chain omega-3 fats used in cell membranes and lipid signaling.

Natural sources: Salmon, sardines, mackerel, herring, anchovies, trout.

Safety flags: blood thinners, bleeding risk, surgery, fish allergy

Sources: Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Provides EPA and DHA mainly in phospholipid form, plus astaxanthin pigments.

Natural sources: Antarctic krill.

Note: Avoid with shellfish allergy unless a clinician says otherwise.

Safety flags: blood thinners, bleeding risk, surgery, shellfish allergy

Sources: Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Vegetarian source of DHA and sometimes EPA.

Natural sources: Marine microalgae.

Safety flags: blood thinners, bleeding risk, surgery

Sources: Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Provides ALA, a plant omega-3 that can be converted inefficiently to EPA and DHA.

Natural sources: Flaxseed, flaxseed oil.

Sources: Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Omega-6 fatty acid involved in eicosanoid pathways.

Natural sources: Evening primrose oil, borage seed oil, black currant seed oil, hemp seeds in smaller amounts.

Sources: Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23), FoodData Central (2026-07-23)

Function: Green plant pigment involved in photosynthesis; supplement products are often chlorophyllin derivatives.

Natural sources: Spinach, parsley, wheatgrass, alfalfa, green beans, kale.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Blue-green algae providing protein, carotenoids, phycocyanin pigments, and minerals in variable amounts.

Natural sources: Spirulina algae.

Safety flags: product quality, liver disease, autoimmune disease, pregnancy/breastfeeding

Sources: United States Pharmacopeia Safety Evaluation of Spirulina (2026-07-26), Spirulina (2026-07-26), FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Green algae providing chlorophyll, protein, carotenoids, and fiber-like cell wall components.

Natural sources: Chlorella algae.

Safety flags: warfarin, allergy, pregnancy/breastfeeding, GI effects

Sources: Chlorella Supplementation, Metabolic Dysfunction, and Oxidative Stress: Systematic Review and Meta-Analysis (2026-07-26), Chlorella (2026-07-26), FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Dietary nitrate can be converted to nitric oxide, supporting blood-flow and exercise-efficiency pathways.

Natural sources: Beets, beet greens, arugula, spinach, lettuce, celery.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Polyphenols studied for vascular function and nitric-oxide-related signaling.

Natural sources: Cocoa powder, dark chocolate, cacao nibs.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Live microorganisms that can support digestive function when specific strains are consumed in adequate amounts.

Natural sources: Yogurt with live cultures, kefir, kimchi, sauerkraut with live cultures, miso, tempeh, kombucha.

Note: Benefits are strain-specific; not every fermented food has proven probiotic effects.

Safety flags: immunosuppression, serious illness, premature infants

Sources: Probiotics Fact Sheet for Consumers (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Fermentable fibers feed beneficial gut microbes and support short-chain fatty acid production.

Natural sources: Onions, garlic, leeks, asparagus, Jerusalem artichoke, chicory root, oats, legumes.

Sources: Probiotics Fact Sheet for Consumers (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Soluble gel-forming fiber that supports stool consistency and helps bind bile acids.

Natural sources: Psyllium husk from Plantago ovata seeds.

Safety flags: medication spacing, swallowing difficulty, fluid intake

Sources: Probiotics Fact Sheet for Consumers (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Starch fraction that resists digestion and is fermented by gut microbes.

Natural sources: Cooked and cooled potatoes, cooked and cooled rice, green bananas, beans, lentils, oats.

Sources: Probiotics Fact Sheet for Consumers (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Enzymes help break down carbohydrates, proteins, fats, or specific sugars such as lactose.

Natural sources: Pineapple bromelain, papaya papain, kiwifruit actinidin, fermented foods; human pancreas and small intestine produce digestive enzymes.

Sources: Probiotics Fact Sheet for Consumers (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Water-binding glycosaminoglycan found in skin, joints, and connective tissue.

Natural sources: Bone broth and connective tissue foods in small/variable amounts, organ meats, root vegetables and leafy greens support general skin nutrient intake but are not major direct sources.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Trace compound associated with connective tissue structure and collagen formation.

Natural sources: Oats, barley, brown rice, bananas, green beans, horsetail herb.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Lipids that help maintain the skin barrier and reduce water loss from the outer skin layer.

Natural sources: Wheat germ, brown rice, sweet potatoes, soybeans, eggs, dairy.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Source of gamma-linolenic acid, an omega-6 fatty acid used in skin-barrier and inflammatory signaling pathways.

Natural sources: Evening primrose seeds.

Sources: FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Adaptogenic herb studied for stress, sleep, and perceived well-being outcomes.

Natural sources: Ashwagandha root.

Note: Use caution in pregnancy, thyroid disease, autoimmune disease, liver concerns, or with sedating medicines.

Safety flags: pregnancy/breastfeeding, thyroid disease, autoimmune disease, liver disease, sedatives

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Plant alkaloid studied for glucose and lipid metabolism markers.

Natural sources: Barberry, goldenseal, Oregon grape, goldthread.

Note: Important interaction and pregnancy cautions; do not treat as a casual food-like supplement.

Safety flags: pregnancy/breastfeeding, diabetes medications, blood pressure medications, antibiotics, infants, transplant medications

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Anthocyanin-rich berry traditionally used in seasonal immune-support products.

Natural sources: Cooked elderberries, elderberry syrups and extracts.

Note: Raw or improperly prepared elderberry plant parts can be unsafe.

Safety flags: product preparation, pregnancy/breastfeeding, autoimmune disease

Sources: Elderberry for Prevention and Treatment of Viral Respiratory Illnesses: A Systematic Review (2026-07-26), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root vegetable used traditionally for energy, libido, and well-being contexts.

Natural sources: Maca root.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Source of silymarin flavonolignans studied for liver-related biomarkers and antioxidant signaling.

Natural sources: Milk thistle seeds.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary rhizome containing gingerols and shogaols, studied for nausea and digestive comfort contexts.

Natural sources: Fresh ginger root, dried ginger, ginger tea.

Safety flags: blood thinners, bleeding risk, surgery, pregnancy/breastfeeding, gallbladder disease, reflux

Sources: Ginger (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Allium food containing organosulfur compounds studied for cardiovascular and immune-related markers.

Natural sources: Fresh garlic, roasted garlic, aged garlic preparations.

Safety flags: blood thinners, bleeding risk, surgery, reflux, pregnancy/breastfeeding

Sources: Garlic: Usefulness and Safety (2026-07-26), Colds, Flu, and Complementary Health Approaches (2026-07-26), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Root containing ginsenosides, studied for fatigue, cognitive-performance, and cardiometabolic marker contexts.

Natural sources: Panax ginseng root.

Note: Use caution with pregnancy, autoimmune disease, insomnia, diabetes medicines, blood-pressure medicines, statins, antidepressants, and anticoagulants.

Safety flags: pregnancy/breastfeeding, autoimmune disease, diabetes medications, blood pressure medications, insomnia, blood thinners

Sources: Herb-Drug Interactions: What the Science Says (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root used traditionally for fatigue and stress-support contexts; chemistry differs from Asian ginseng.

Natural sources: Panax quinquefolius root.

Note: Potential blood sugar and medication interaction cautions should be reviewed before supplement use.

Safety flags: diabetes medications, blood thinners, pregnancy/breastfeeding

Sources: Herb-Drug Interactions: What the Science Says (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root used traditionally in TCM immune and vitality formulas; modern evidence remains condition-specific and incomplete.

Natural sources: Astragalus membranaceus root.

Note: Use caution with autoimmune disease, transplant medicines, immunosuppressants, pregnancy, and complex medication regimens.

Safety flags: autoimmune disease, immunosuppression, transplant medications, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Sweet root used as food flavoring and traditional digestive/respiratory botanical.

Natural sources: Glycyrrhiza glabra root, Glycyrrhiza uralensis root.

Note: Glycyrrhizin-containing licorice can raise blood pressure, lower potassium, and interact with corticosteroids and heart, kidney, or blood-pressure conditions.

Safety flags: blood pressure, low potassium, heart disease, kidney disease, pregnancy/breastfeeding, corticosteroids

Sources: Licorice Root (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Berry used traditionally as an adaptogenic botanical and studied for liver-enzyme and stress-response pathways.

Natural sources: Schisandra chinensis berries.

Note: Potential drug-metabolism interactions need review before concentrated extract use.

Safety flags: drug metabolism, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Carotenoid-rich berry used as a food and traditional tonic ingredient.

Natural sources: Dried goji berries, goji juice, Lycium barbarum fruit.

Note: Possible warfarin interaction reports make anticoagulant use a caution context.

Safety flags: blood thinners, diabetes medications, blood pressure medications

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Root used in traditional formulas for menstrual and women’s-health contexts.

Natural sources: Angelica sinensis root.

Note: Avoid casual use in pregnancy and use caution with anticoagulants, hormone-sensitive conditions, and surgery contexts.

Safety flags: pregnancy/breastfeeding, blood thinners, hormone-sensitive conditions, surgery

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Fruit used as food and in traditional formulas for nourishment and sleep-support contexts.

Natural sources: Fresh jujube fruit, dried red dates.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Root containing baicalin and related flavones, used in traditional formulas and studied for inflammatory signaling.

Natural sources: Scutellaria baicalensis root.

Note: Product identity and liver-safety context should be reviewed carefully for skullcap products.

Safety flags: liver disease, product quality, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root used in traditional formulas, often in menstrual, liver, and muscle-cramp contexts.

Natural sources: Paeonia lactiflora root.

Note: Evidence is largely traditional/formula-based; medication and pregnancy contexts need review.

Safety flags: pregnancy/breastfeeding, blood thinners

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary bark spice studied for glucose and lipid marker contexts; species and coumarin content matter.

Natural sources: Ceylon cinnamon bark, cassia cinnamon bark.

Note: Cassia cinnamon can be high in coumarin; use caution with liver disease, anticoagulants, and high-dose extracts.

Safety flags: liver disease, blood thinners, diabetes medications

Sources: Effect of Cinnamon Supplementation on Glycemic Control: Umbrella Meta-Analysis (2026-07-26), Herbs at a Glance (2026-07-23), FoodData Central (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Leaf and oil used for digestive comfort; peppermint oil products are studied for irritable bowel symptom contexts.

Natural sources: Peppermint leaves, peppermint oil.

Note: Peppermint oil can worsen reflux and should be used cautiously around young children and certain medical conditions.

Safety flags: reflux, young children, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), FoodData Central (2026-07-23)

Function: Aromatic seed and bulb used for culinary flavor and digestive-comfort traditions.

Natural sources: Fennel bulb, fennel seed, fennel tea.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary herb containing rosmarinic acid and other phenolics studied for antioxidant and cognitive-aroma contexts.

Natural sources: Fresh rosemary, dried rosemary.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary herb containing thymol and phenolic compounds used traditionally for respiratory and culinary contexts.

Natural sources: Fresh thyme, dried thyme.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary herb rich in aromatic phenols; oil products are much more concentrated than food uses.

Natural sources: Fresh oregano, dried oregano, oregano oil.

Note: Concentrated oregano oil should be treated as a potent extract, not as ordinary food seasoning.

Safety flags: pregnancy/breastfeeding, blood thinners, concentrated essential oils

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary herb studied for cognitive, oral, and menopausal symptom contexts.

Natural sources: Fresh sage, dried sage.

Note: High-thujone sage products and essential oils require caution.

Safety flags: pregnancy/breastfeeding, seizure disorder, concentrated essential oils

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary spice whose piperine can increase absorption of some compounds and affect drug metabolism.

Natural sources: Black peppercorns.

Note: Piperine-enhanced supplements can change exposure to medications and other supplement ingredients.

Safety flags: drug metabolism, medication interactions

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Aromatic spice used in food and traditional digestive contexts.

Natural sources: Cardamom pods, cardamom seeds.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Spice containing eugenol, used traditionally for oral comfort and culinary flavor.

Natural sources: Clove buds.

Note: Clove oil is concentrated and can irritate tissue or interact with bleeding-risk contexts.

Safety flags: blood thinners, bleeding risk, concentrated essential oils

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Culinary seed spice used traditionally for digestion and studied for metabolic marker contexts.

Natural sources: Cumin seeds, ground cumin.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Seed and leaf herb used in food and traditional digestive contexts.

Natural sources: Coriander seed, cilantro leaves.

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Adaptogenic aromatic herb used in Ayurveda for stress and metabolic wellness contexts.

Natural sources: Tulsi leaves, holy basil tea.

Note: Use caution in pregnancy, fertility-treatment contexts, bleeding-risk contexts, and with glucose-lowering medicines.

Safety flags: pregnancy/breastfeeding, diabetes medications, blood thinners, fertility treatment

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Leaf used in Ayurveda and other traditions for skin, circulation, and cognitive contexts.

Natural sources: Centella asiatica leaves.

Note: Potential liver-safety and sedative-medication cautions should be reviewed for extracts.

Safety flags: liver disease, sedatives, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Flower tea used traditionally for sleep, relaxation, and digestive comfort.

Natural sources: German chamomile flowers, Roman chamomile flowers.

Note: Use caution with ragweed-family allergy, sedatives, anticoagulants, and pregnancy contexts.

Safety flags: ragweed allergy, sedatives, blood thinners, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root used traditionally and studied for sleep and relaxation contexts.

Natural sources: Valerian root.

Note: May cause sedation and should be used cautiously with alcohol, sedatives, driving, pregnancy, and surgery contexts.

Safety flags: sedatives, alcohol, driving, surgery, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Aerial parts used traditionally for relaxation and sleep contexts.

Natural sources: Passionflower aerial parts, passionflower tea.

Note: Sedation and pregnancy cautions should be reviewed before concentrated use.

Safety flags: sedatives, pregnancy/breastfeeding

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Aromatic mint-family herb used traditionally for calm, sleep, and digestive comfort.

Natural sources: Lemon balm leaves, lemon balm tea.

Note: Use caution with sedatives and thyroid-medication contexts until reviewed.

Safety flags: sedatives, thyroid medications

Sources: Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23), FoodData Central (2026-07-23)

Function: Vitex fruit extract used traditionally and studied for premenstrual symptoms such as breast tenderness and cyclical mood or discomfort patterns.

Natural sources: Vitex agnus-castus fruit, chaste tree berry extracts.

Note: Hormone-sensitive conditions, pregnancy, breastfeeding, fertility treatment, and hormone-related medicines need clinician review.

Safety flags: hormone-sensitive conditions, pregnancy/breastfeeding, fertility treatment, hormone medications

Sources: Chasteberry: Usefulness and Safety (2026-08-03), Premenstrual Syndrome (PMS) (2026-08-03), Premenstrual Syndrome (PMS) (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root and rhizome botanical used in menopause-symptom products, especially hot-flash and night-sweat contexts.

Natural sources: Actaea racemosa root, black cohosh rhizome extracts.

Note: Evidence is inconsistent and rare serious liver-injury reports require clear liver-safety caution.

Safety flags: liver disease, pregnancy/breastfeeding, hormone-sensitive conditions, product quality

Sources: Black Cohosh Fact Sheet for Health Professionals (2026-08-03), Menopausal Symptoms: In Depth (2026-08-03), Menopausal Symptoms and Complementary Health Approaches (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Aromatic flower used as tea, essential oil, or standardized oral oil in relaxation and anxiety research contexts.

Natural sources: Lavender flowers, lavender essential oil, lavender tea.

Note: Oral products, aromatherapy, massage oils, and teas are not interchangeable; sedative combinations can increase drowsiness.

Safety flags: sedatives, pregnancy/breastfeeding, allergy, children

Sources: Anxiety and Complementary Health Approaches: What the Science Says (2026-08-03), Anxiety and Complementary Health Approaches (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Root beverage and extract traditionally used in Pacific Island cultures and studied for short-term anxiety symptom contexts.

Natural sources: Piper methysticum root and rhizome.

Note: Kava has serious liver-safety concerns and should not be treated as a casual calming supplement.

Safety flags: liver disease, alcohol, sedatives, driving, pregnancy/breastfeeding

Sources: Anxiety and Complementary Health Approaches: What the Science Says (2026-08-03), Sleep Disorders and Complementary Health Approaches: Usefulness and Safety (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Precursor to carnosine, a muscle buffer involved in high-intensity exercise performance.

Natural sources: Chicken, turkey, beef, pork, fish.

Sources: Spilling the Beans: How Much Caffeine is Too Much? (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Central nervous system stimulant that can support alertness and exercise performance in some contexts.

Natural sources: Coffee, tea, yerba mate, guarana, cacao.

Safety flags: pregnancy/breastfeeding, sleep, anxiety, heart rhythm, blood pressure

Sources: Spilling the Beans: How Much Caffeine is Too Much? (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Polyphenol-rich fruit studied for exercise recovery and sleep-related markers.

Natural sources: Montmorency tart cherries, tart cherry juice.

Sources: Spilling the Beans: How Much Caffeine is Too Much? (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Provide sodium, potassium, magnesium, and carbohydrate-water combinations that support hydration and fluid balance.

Natural sources: Salted soups, milk, coconut water, bananas, potatoes, oranges, yogurt.

Note: Individual electrolyte needs vary with sweat rate, climate, health conditions, and medications.

Sources: Spilling the Beans: How Much Caffeine is Too Much? (2026-07-23), Dietary Reference Intakes Collection (2026-07-23), FoodData Central (2026-07-23)

Function: Adds calories without essential nutrient density and can crowd out nutrient-rich foods.

Natural sources: Not naturally present as added sugar; common sources include sweetened drinks, desserts, candy, sweetened cereals, and sauces.

Note: Naturally occurring sugars in intact fruit and plain dairy are tracked differently from added sugars.

Sources: Dietary Guidelines for Americans (2026-07-23), Dietary Reference Intakes Collection (2026-07-23)

Function: Dietary fat class that affects blood lipid patterns; guidance focuses on limiting excess and replacing some saturated fat with unsaturated fats.

Natural sources: Butter, cream, cheese, fatty meats, coconut oil, palm oil.

Sources: Dietary Guidelines for Americans (2026-07-23), Dietary Reference Intakes Collection (2026-07-23)

Function: Industrial trans fats adversely affect blood lipids; guidance is to keep intake as low as possible.

Natural sources: Small natural amounts in ruminant meat and dairy; industrial partially hydrogenated oils are the major avoidable source.

Sources: Dietary Guidelines for Americans (2026-07-23), Dietary Reference Intakes Collection (2026-07-23)

Function: Provide fiber, B vitamins, minerals, and intact grain phytochemicals.

Natural sources: Oats, brown rice, whole wheat, barley, rye, quinoa, buckwheat, corn.

Sources: Dietary Guidelines for Americans (2026-07-23), Dietary Reference Intakes Collection (2026-07-23)

Function: Food-pattern source of protein, iodine, selenium, vitamin D in some fish, and EPA/DHA omega-3 fats.

Natural sources: Salmon, sardines, trout, herring, anchovies, shellfish.

Note: Pregnancy and child guidance should include mercury-aware choices.

Sources: Dietary Guidelines for Americans (2026-07-23), Dietary Reference Intakes Collection (2026-07-23)

Function: Red carotenoid studied for antioxidant activity and prostate and cardiovascular biomarker contexts.

Natural sources: Tomatoes, tomato paste, watermelon, pink grapefruit, guava, papaya.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Pigments that contribute to red, blue, and purple plant colors and are studied for vascular and cognitive aging markers.

Natural sources: Blueberries, blackberries, black raspberries, cherries, purple corn, red cabbage.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Green-tea catechin studied for antioxidant signaling and cardiometabolic biomarkers.

Natural sources: Green tea, matcha, white tea.

Note: Concentrated green tea extracts can carry liver-safety concerns at high intakes.

Safety flags: liver disease, caffeine sensitivity

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Soluble fibers that can support cholesterol and glycemic-response markers depending on source and dose.

Natural sources: Oats, barley, mushrooms, yeast.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Fermentable prebiotic fiber that supports gut microbial short-chain fatty acid production.

Natural sources: Chicory root, Jerusalem artichoke, onions, garlic, leeks, asparagus.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Methyl donor involved in homocysteine metabolism and osmolyte functions.

Natural sources: Beets, spinach, quinoa, wheat bran, shellfish.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Sugar alcohol involved in cell-signaling pathways; myo-inositol and D-chiro-inositol are studied in PCOS and insulin-signaling contexts.

Natural sources: Beans, citrus fruits, cantaloupe, whole grains, nuts, seeds.

Note: Supplement forms and ratios vary; PCOS, fertility treatment, pregnancy, and glucose-lowering medication contexts need clinician review.

Safety flags: pregnancy/breastfeeding, fertility treatment, diabetes medications, GI effects

Sources: Nutritional Supplements and Herbal Medicines for Women With Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis (2026-08-03), The Effectiveness of Nutritional Supplements in Improving Polycystic Ovary Syndrome in Women: A Systematic Review and Network Meta-Analysis (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Transports long-chain fatty acids into mitochondria for energy metabolism.

Natural sources: Beef, lamb, pork, cod, chicken, milk.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Leucine metabolite studied for muscle protein breakdown and training or aging-related muscle contexts.

Natural sources: Small amounts in foods that contain leucine; catfish, grapefruit, and alfalfa contain trace amounts.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Spice containing crocins and safranal, studied for mood and appetite-related outcomes.

Natural sources: Saffron stigmas from Crocus sativus.

Safety flags: pregnancy/breastfeeding, mood medications

Sources: Saffron and Major Depressive Disorder: A Meta-Analysis of Randomized Clinical Trials (2026-07-26), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Adaptogenic root studied for fatigue, stress resilience, and perceived mental performance.

Natural sources: Rhodiola rosea root.

Safety flags: insomnia, anxiety, blood pressure medications, pregnancy/breastfeeding

Sources: Rhodiola Rosea for Physical and Mental Fatigue: A Systematic Review (2026-07-26), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Botanical studied for memory and attention outcomes over repeated use.

Natural sources: Bacopa monnieri aerial parts.

Safety flags: sedatives, pregnancy/breastfeeding

Sources: Meta-Analysis of Randomized Controlled Trials on Cognitive Effects of Bacopa Monnieri Extract (2026-07-26), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Hormone involved in circadian timing and darkness signaling; supplemental melatonin is studied for jet lag, delayed sleep-wake phase disorder, and selected sleep contexts.

Natural sources: Produced by the pineal gland in response to darkness, small variable amounts in tart cherries, walnuts, pistachios, grapes, and some grains.

Note: Supplement products may vary from label amounts; timing, age, pregnancy, epilepsy, blood thinners, dementia, and pediatric storage safety matter.

Safety flags: children, pregnancy/breastfeeding, epilepsy, blood thinners, dementia, daytime drowsiness

Sources: Melatonin: What You Need To Know (2026-08-03), Sleep Disorders and Complementary Health Approaches: Usefulness and Safety (2026-08-03), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Edible mushroom studied for nerve-growth-factor-related pathways and cognitive outcomes.

Natural sources: Lion's mane mushroom.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Mushroom traditionally used for immune and stress-support contexts; concentrated extracts vary widely.

Natural sources: Reishi mushroom fruiting body and mycelium products.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)

Function: Fungus traditionally used for stamina and respiratory-support contexts; modern products are usually cultivated species or mycelium.

Natural sources: Cordyceps militaris, cultivated cordyceps mycelium products.

Sources: FoodData Central (2026-07-23), Herbs at a Glance (2026-07-23), Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)