Moderate evidenceVitamins & minerals

Anemia Support Formulas

Iron combined with B12, folate and vitamin C. The iron is what treats iron deficiency anaemia; the added vitamin C contributes less than the marketing suggests, and taking iron blindly is a bad idea.

Evidence last reviewed: August 2026

View on iHerb Ships to 180+ countries · welcome discount for new customers

What the science says

Iron corrects iron deficiency anaemia Strong evidence
Oral iron reliably raises haemoglobin and replenishes stores in iron deficiency anaemia across many randomized trials and Cochrane reviews in blood donors, children and patients with chronic disease. This is the active component of these blends.
Added vitamin C adds little Moderate evidence
A systematic review and meta-analysis of vitamin C with iron in iron deficiency anaemia found no meaningful advantage over iron alone on haemoglobin outcomes. A second meta-analysis of co-intervention studies reached a similar conclusion.
B12 and folate only help if those are deficient Moderate evidence
B12 and folate treat their own specific anaemias and do nothing for iron deficiency. Blends supply them at low doses that may mask, rather than treat, a real B12 deficiency.

Dosage & safety

Studied doseTreatment doses of elemental iron are usually 30–100 mg/day; alternate-day dosing is often as effective and better tolerated. Take with water between meals, away from tea, coffee, calcium and zinc.

SafetyIron causes constipation, dark stools and nausea, and is a leading cause of poisoning in young children — keep out of reach. Do not supplement iron without a confirmed deficiency: excess is harmful, and is dangerous in haemochromatosis or thalassaemia. Anaemia should be investigated for a cause rather than self-treated, especially in men and postmenopausal women.

Scientific references

Efficacy of vitamin C with Fe supplementation in patients with iron deficiency anemia: a systematic review and meta-analysis
Deng J, Ramelli L, Li PY — Blood Vessel Thromb Hemost, 2024
Treatment efficacy of vitamin C or ascorbate given as co-intervention with iron for anemia - A systematic review and meta-analysis of experimental studies
Loganathan V, Bharathi A, Prince AM — Clin Nutr ESPEN, 2023
Oral or parenteral iron supplementation to reduce deferral, iron deficiency and/or anaemia in blood donors
Geneen LJ, Atha K, Kimber C — Cochrane Database Syst Rev, 2026

Where to buy

View on iHerb

Ships to 180+ countries · welcome discount for new customers

Referral link — this site may earn a commission on purchases.

Related in Vitamins & minerals

Vitamin A (Retinol) Moderate evidence
Vitamin B1 (Thiamine) Moderate evidence
Vitamin B5 (Pantothenic Acid) Limited evidence
Vitamin B6 (Pyridoxine) Moderate evidence
Vitamin K1 Limited evidence
Calcium Moderate evidence