Summary
Iron and hair loss are linked through your iron stores, measured as ferritin: low ferritin is common in people with shedding and is a well known cause of tiredness.
Correcting a proven shortfall can ease fatigue, and gentle forms such as ferrous bisglycinate tend to cause fewer stomach problems. Iron is not harmless in excess, so test before you supplement.
More hair in the shower drain, a thinner ponytail and an afternoon slump that coffee no longer fixes. When these turn up together, doctors often check iron first. Here is how iron and hair loss are connected, what ferritin tells you, what studies found and which form of iron your stomach can live with.
| At a glance | Iron |
|---|---|
| Main job | Carries oxygen in red blood cells and powers energy production in every cell |
| Key blood test | Ferritin, which reflects your iron stores, alongside a full blood count |
| EU daily reference value (NRV) | 14 mg |
| EFSA safe level of intake | 40 mg a day for adults |
| Best food sources | Red meat, fish and poultry; lentils, beans, tofu and leafy greens |
| Gentle form | Ferrous bisglycinate, iron bound to the amino acid glycine |
What is iron and why do we need it?
Iron sits at the heart of haemoglobin, the protein that carries oxygen from your lungs to every tissue. It also helps your cells turn food into energy. The EU recognises that iron contributes to the reduction of tiredness and fatigue and to normal oxygen transport in the body.
Your body stores spare iron as ferritin. Stores can run low for months before anaemia appears. Iron from meat and fish is absorbed more easily than iron from plants, and vitamin C in the same meal helps the plant kind.
Who is most likely to run low on iron?
- Women with heavy periods, the most common reason for low stores in younger adults.
- Pregnant women, whose needs rise sharply.
- Vegetarians and vegans, since plant iron is less easily absorbed.
- Regular blood donors and endurance athletes.
- People after weight loss surgery or with gut conditions that affect absorption.
Common signs include tiredness, pale skin, breathlessness on stairs, brittle nails and increased hair shedding. Only a blood test can confirm low iron.
How iron and hair loss are linked
Hair shedding and thinning
Hair follicles divide fast, so they are sensitive to shortfalls. Low ferritin is often found in women with diffuse shedding, called telogen effluvium, though researchers still debate whether it is a cause.
Tiredness and low energy
This link is clearer. Even without anaemia, low ferritin has been tied to fatigue, and correcting it helped in a well designed trial.
What the research shows on iron and hair loss and fatigue
Iron for tiredness without anaemia (2012, CMAJ). In 198 tired women aged 18 to 53 with ferritin below 50 but normal haemoglobin, 80 mg of iron a day for 12 weeks cut fatigue scores by 47.7 percent, compared with 28.8 percent on placebo. Ferritin rose, but mood and quality of life did not change.
In a trial of 198 tired women with low ferritin but no anaemia, 12 weeks of iron reduced fatigue scores by 47.7 percent, against 28.8 percent with placebo.
Vitamins, minerals and hair loss (2019, Dermatology and Therapy). This review found iron plays a role in the hair growth cycle, but the evidence that supplements regrow hair is not yet clear. The authors call for large placebo controlled trials in people with proven deficiency.
Hair loss after weight loss surgery (2021, Obesity Surgery). Pooling 18 studies and 2,538 patients, this meta analysis found hair loss affected more than half of patients and was linked with lower ferritin, zinc and folic acid levels.
Gentler iron (2023, Nutrition Reviews). Across 17 randomised trials, ferrous bisglycinate raised haemoglobin more than other iron supplements in pregnant women and caused fewer digestive side effects.
Every other day dosing (2017, Lancet Haematology). In young women with low iron stores, taking iron on alternate days led to better absorption than daily doses, and a single morning dose worked as well as splitting it.
| Study | Who | What was tested | Main finding |
|---|---|---|---|
| Vaucher, 2012 | 198 tired women, low ferritin | 80 mg iron daily, 12 weeks | Less fatigue than placebo |
| Almohanna, 2019 | Review | Nutrients and hair loss | Iron matters; regrowth trials needed |
| Zhang, 2021 | 18 studies, 2,538 patients | Hair loss after surgery | Linked with low ferritin, zinc, folate |
| Fischer, 2023 | 17 trials | Bisglycinate vs other iron | Fewer stomach side effects |
| Stoffel, 2017 | Women with low stores | Daily vs alternate days | Alternate days absorbed better |
How much iron, and when?
- Daily reference: the EU NRV used on labels is 14 mg.
- Safe level: EFSA set 40 mg a day as a safe level of intake for adults. Higher doses are a medical treatment and need supervision.
- Test first: ask for ferritin and a full blood count, and retest after a few months.
- Timing: iron is best absorbed away from tea, coffee, calcium and dairy. Pair it with vitamin C rich foods.
Forms of iron: which is gentlest?
Ferrous sulfate is cheap and widely prescribed, but nausea and constipation are common. Ferrous bisglycinate binds iron to glycine, and trials link it with fewer digestive complaints. Liposomal iron wraps iron in tiny phospholipid bubbles; see how liposomal supplements work. Since vitamin C helps iron absorption, you may also like our comparison of liposomal and regular vitamin C.
Is iron safe?
- Too much iron can build up and damage organs, so do not take high doses without a blood test.
- People with haemochromatosis or other iron overload conditions should avoid iron supplements.
- Iron can reduce absorption of thyroid medicine and some antibiotics, so ask your pharmacist about spacing.
- Sudden or patchy hair loss, or tiredness with weight loss, needs a doctor.
Iron in FOOON VIT & MIN + CoQ10
VIT & MIN + CoQ10 provides iron as ferrous bisglycinate, alongside vitamin C, zinc, biotin, B vitamins and Coenzyme Q10 as ubiquinol, in slow release liposomal capsules made with sunflower lecithin. The directions are up to 2 capsules daily with water after your main meal. It is registered with the EOF and made under ISO 22000 food safety standards. For hair, read who biotin really helps, and for energy, our guide to CoQ10 and ageing.
Frequently asked questions
Can low iron cause hair loss?
Low ferritin is often found in people with diffuse shedding, and iron is needed for healthy hair growth. Whether iron alone regrows hair is still being studied.
What ferritin level is linked with hair loss?
There is no single agreed cut off. Your doctor will read ferritin alongside your blood count, symptoms and any inflammation.
How long does it take for hair to grow back after fixing iron?
Hair grows slowly, so improvements usually take several months to become visible.
Which form of iron is easiest on the stomach?
Trials link ferrous bisglycinate with fewer digestive side effects than other iron supplements.
Should I take iron every day or every other day?
A 2017 trial found alternate day dosing improved absorption in women with low stores. Follow your doctor's advice for treatment doses.
Can I take iron without a blood test?
Small amounts in a multivitamin suit most adults, but higher doses should follow a blood test.
Bottom line
Iron and hair loss are connected through your ferritin stores, and low iron is a common, fixable cause of tiredness. Get tested before taking high doses, choose a gentle form such as ferrous bisglycinate, take it away from tea and calcium, and give hair several months. See a doctor for sudden or patchy shedding.
Explore VIT & MIN + CoQ10 →Related reading: SOMA
Sources
- Vaucher P, Druais PL, Waldvogel S, Favrat B. Effect of iron supplementation on fatigue in nonanemic menstruating women with low ferritin: a randomized controlled trial. CMAJ. 2012;184(11):1247-54. PMID 22777991. doi.org/10.1503/cmaj.110950
- Almohanna HM, Ahmed AA, Tsatalis JP, Tosti A. The Role of Vitamins and Minerals in Hair Loss: A Review. Dermatology and Therapy. 2019;9(1):51-70. PMID 30547302. doi.org/10.1007/s13555-018-0278-6
- Zhang W, Fan M, Wang C, et al. Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis. Obesity Surgery. 2021;31(6):2649-2659. PMID 33675022. doi.org/10.1007/s11695-021-05311-2
- Fischer JAJ, Cherian AM, Bone JN, Karakochuk CD. The effects of oral ferrous bisglycinate supplementation on hemoglobin and ferritin concentrations in adults and children: a systematic review and meta-analysis of randomized controlled trials. Nutrition Reviews. 2023;81(8):904-920. PMID 36728680. doi.org/10.1093/nutrit/nuac106
- Stoffel NU, Cercamondi CI, Brittenham G, et al. Iron absorption from oral iron supplements given on consecutive versus alternate days and as single morning doses versus twice-daily split dosing in iron-depleted women: two open-label, randomised controlled trials. Lancet Haematology. 2017;4(11):e524-e533. PMID 29032957. doi.org/10.1016/S2352-3026(17)30182-5
- European Food Safety Authority. Overview on Tolerable Upper Intake Levels as derived by the Scientific Committee on Food (SCF) and the EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Version 11, August 2025. efsa.europa.eu
- Regulation (EU) No 1169/2011 on the provision of food information to consumers, Annex XIII (nutrient reference values). eur-lex.europa.eu
