Iron
Red meat and shellfish, Legumes, Fortified cereals, Leafy greens.
Back to TagsRestless legs symptoms should be evaluated for iron deficiency, kidney disease, neuropathy, sleep apnea, pregnancy, and medication triggers. Iron supplements should only be used after iron studies and clinician guidance.
Source mix: Academic Review, Official Reference, Government Health Agency. Restless Legs Syndrome Treatment of Restless Legs Syndrome and Periodic Limb Movement Disorder: American Academy of Sleep Medicine Clinical Practice Guideline Iron Fact Sheet for Health Professionals Magnesium Fact Sheet for Health Professionals Spilling the Beans: How Much Caffeine is Too Much? Vitamin B12 Fact Sheet for Health Professionals Folate Fact Sheet for Health Professionals
Tag
Restless Legs
Restless legs references connect iron status, sleep disruption, caffeine/alcohol/nicotine context, pregnancy, kidney disease, neuropathy, and medications that can aggravate symptoms.
restless legsrlsrestless leg syndromewillis-ekbomleg crawlingurge to move legsnight leg discomfort
When To Seek Medical Care
- Get medical evaluation for new, worsening, one-sided, painful, swollen, weak, numb, or injury-related leg symptoms.
- Ask about ferritin and transferrin saturation testing before iron treatment decisions.
- Review medications, pregnancy, kidney disease, neuropathy, sleep apnea, caffeine, alcohol, and nicotine context with a clinician.
Linked Items
5
May Support
0
Deficiency Signs
1
Cautions
4
Quick Compare
| Item | Type | Relationship | Evidence |
|---|---|---|---|
| Iron | nutrient | Deficiency Sign | NINDS RLS overview and AASM guideline good-practice statement on iron studies. Academic Review |
| Magnesium | nutrient | Caution / Limited Evidence | Official magnesium safety/intake framing; RLS evaluation should prioritize known triggers and iron studies. Official Reference |
| Caffeine | bioactive | Possible Side Effect | NINDS identifies caffeine, alcohol, and nicotine reduction as relevant lifestyle context. Academic Review |
| Vitamin B12 | nutrient | Caution / Limited Evidence | Official B12 neurologic-role framing plus RLS differential-context caution. Official Reference |
| Folate | nutrient | Caution / Limited Evidence | Official folate framing plus RLS evaluation context. Official Reference |
Foods First
Magnesium
Nuts and seeds, Legumes, Whole grains, Leafy green vegetables.
Caffeine
Coffee, tea, yerba mate, guarana, cacao.
Vitamin B12
Meat and fish, Eggs and dairy foods, Fortified plant foods.
Folate
Leafy green vegetables, Legumes, Fortified grain products.
Medication & Safety Cautions
Iron
Low iron status can contribute to restless legs symptoms, and guidelines emphasize ferritin and transferrin saturation testing before iron treatment decisions. | Iron overdose can be dangerous, especially for children. High-dose use should be guided by a clinician.
Magnesium
Magnesium is often discussed for leg discomfort or sleep, but restless-legs evidence is not the same as official magnesium intake guidance. | The DRI UL applies to supplemental/pharmacological magnesium, not magnesium naturally present in food and water.
Caffeine
Caffeine may aggravate restless legs or sleep disruption in some people, especially later in the day. | pregnancy/breastfeeding | sleep | anxiety
Vitamin B12
B12 belongs in neurologic symptom review contexts, but restless legs should not be assumed to be a B12 issue without evaluation.
Folate
Folate supports red blood cell formation and neurologic context, but RLS symptoms require cause-based assessment rather than broad supplementation. | The UL applies to folic acid from supplements and fortified foods, not naturally occurring food folate.
Key Studies & Fixed References
These are the dated references used for this tag. Live research searches can change; these links explain the fixed wording shown on this page.
National Institute of Neurological Disorders and Stroke | Acquired 2026-08-03 | Academic Review
Restless legs syndrome symptoms, Iron deficiency and RLS, Caffeine alcohol nicotine RLS context.
Journal of Clinical Sleep Medicine / PubMed Central | Acquired 2026-08-03 | Academic Review
Restless legs syndrome iron studies, Ferritin and transferrin saturation context, Clinician-guided iron treatment thresholds.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Heme and non-heme iron, Iron supplement forms, Elemental iron context.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Magnesium supplement forms, Magnesium bioavailability, Magnesium medication interactions.
U.S. Food and Drug Administration | Acquired 2026-07-23 | Government Health Agency
Caffeine safety-limit context.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Cobalamin forms, B12 supplement forms, B12 absorption context.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Food folate, Folic acid, 5-MTHF.
Deficiency Sign
Iron
nutrientAcademic Review
Low iron status can contribute to restless legs symptoms, and guidelines emphasize ferritin and transferrin saturation testing before iron treatment decisions.
Evidence note: NINDS RLS overview and AASM guideline good-practice statement on iron studies.
Sources: Restless Legs Syndrome (2026-08-03)Academic Review, Treatment of Restless Legs Syndrome and Periodic Limb Movement Disorder: American Academy of Sleep Medicine Clinical Practice Guideline (2026-08-03)Academic Review, Iron Fact Sheet for Health Professionals (2026-07-23)Official Reference
Possible Side Effect
Caffeine
bioactiveAcademic Review
Caffeine may aggravate restless legs or sleep disruption in some people, especially later in the day.
Evidence note: NINDS identifies caffeine, alcohol, and nicotine reduction as relevant lifestyle context.
Sources: Restless Legs Syndrome (2026-08-03)Academic Review, Spilling the Beans: How Much Caffeine is Too Much? (2026-07-23)Government Health Agency
Caution / Limited Evidence
Magnesium
nutrientOfficial Reference
Magnesium is often discussed for leg discomfort or sleep, but restless-legs evidence is not the same as official magnesium intake guidance.
Evidence note: Official magnesium safety/intake framing; RLS evaluation should prioritize known triggers and iron studies.
Sources: Magnesium Fact Sheet for Health Professionals (2026-07-23)Official Reference, Restless Legs Syndrome (2026-08-03)Academic Review
Vitamin B12
nutrientOfficial Reference
B12 belongs in neurologic symptom review contexts, but restless legs should not be assumed to be a B12 issue without evaluation.
Evidence note: Official B12 neurologic-role framing plus RLS differential-context caution.
Sources: Vitamin B12 Fact Sheet for Health Professionals (2026-07-23)Official Reference, Restless Legs Syndrome (2026-08-03)Academic Review
Folate
nutrientOfficial Reference
Folate supports red blood cell formation and neurologic context, but RLS symptoms require cause-based assessment rather than broad supplementation.
Evidence note: Official folate framing plus RLS evaluation context.
Sources: Folate Fact Sheet for Health Professionals (2026-07-23)Official Reference, Restless Legs Syndrome (2026-08-03)Academic Review