Iron: study protocols
423 study groups say how much Iron participants took a day. These are the doses the studies gave. They are not a recommendation.
Dose per serving from products
13,314 products in our catalogue print how much Iron a serving holds.
Most common: 500 mcg to 1 mg, 17% of 13,314 products.
| Dose per serving | Products |
|---|---|
| 100 mcg or less | 339 |
| 100 mcg to 250 mcg | 528 |
| 250 mcg to 500 mcg | 1,340 |
| 500 mcg to 1 mg | 2,261 |
| 1 mg to 2.5 mg | 1,900 |
| 2.5 mg to 5 mg | 2,055 |
| 5 mg to 10 mg | 2,203 |
| 10 mg to 25 mg | 1,594 |
| 25 mg to 50 mg | 750 |
| over 50 mg | 344 |
Dose per serving from research
404 study groups in 220 studies say how much Iron participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 50 mg to 100 mg, 26% of 404 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg or less | 17 |
| 5 mg to 10 mg | 67 |
| 10 mg to 25 mg | 63 |
| 25 mg to 50 mg | 79 |
| 50 mg to 100 mg | 104 |
| 100 mg to 250 mg | 32 |
| 250 mg to 500 mg | 13 |
| 500 mg to 1 g | 16 |
| over 1 g | 13 |
Commonly used together
200 of 423 study groups took Iron with something else. Shown: what 3 or more different studies gave. The 10 most common of 22.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Folic Acid | 136 |
| Zinc | 46 |
| Vitamin A | 36 |
| Vitamin B12 | 21 |
| Vitamin C | 20 |
| Copper | 17 |
| Iodine | 17 |
| Vitamin B6 | 14 |
| Vitamin D | 14 |
| Vitamin E | 13 |
423 study groups
| Study | |||
|---|---|---|---|
| Daily use of Sprinkles micronutrient powder for 2 months reduces anemia among children 6 to 36 months of age in the Kyrgyz Republic: a cluster-randomized trial 2010 · intervention group · Children aged 6 to 36 months in the Kyrgyz Republic | 12.5 mg | 60 days | 1,103 |
| Delivery of iron-fortified yoghurt, through a dairy value chain program, increases hemoglobin concentration among children 24 to 59 months old in Northern Senegal: A cluster-randomized control trial 2017 · Intervention group (MNFY+BCC) · Children aged 24–59 months at baseline in dairy-farming households in Northern Senegal | 2.1 mg | 1 year | 204 |
| Effects of iron and zinc supplementation in Indonesian infants on micronutrient status and growth 2001 · iron · Indonesian infants, 4 months of age | 10 mg | 26 weeks | — |
| Iron deficiency in infancy: applying a physiologic framework for prediction 2006 · high-iron group — vitamins with iron · Healthy Chilean infants, term-born and weighing at least 3 kg at birth; assigned at age 6 months and taking less than 250 mL/day by bottle | 15 mg | 26 weeks | — |
| Effect of iron fortification of nursery complementary food on iron status of infants in the DPRKorea 2008 · iron (Fe) group · Infants aged 6–12 months attending nurseries in the DPRK | 10 mg | 26 weeks | — |
| Effect of iron fortification on malaria incidence in infants and young children in Ghana: a randomized trial 2013 · iron group · Children aged 6–35 months living in a rural, malaria-endemic community in central Ghana | 12.5 mg | 150 days | — |
| The Effectiveness of Different Doses of Iron Supplementation and the Prenatal Determinants of Maternal Iron Status in Pregnant Spanish Women: ECLIPSES Study 2019 · Stratum 2, 20 mg/d iron · Pregnant women over 18 years old with initial hemoglobin above 130 g/L at week 12 and no anemia | 20 mg | 24 weeks | — |
| A randomised placebo-controlled trial to determine the effect of iron supplementation on pregnancy outcome in pregnant women with haemoglobin > or = 13.2 g/dl 2007 · case group · Pregnant women in the early second trimester with haemoglobin ≥13.2 g/dl | 50 mg | — | 370 |
| Effect of prenatal zinc supplementation on birthweight 2009 · Control group · Pregnant women recruited by 16 weeks’ gestation in Ghana; age range 16–44 years; no stated diagnosed condition, with women taking other zinc supplements or with severe anaemia excluded. | 20 mg | — | 301 |
| Effect of prenatal zinc supplementation on birthweight 2009 · Iron-zinc group · Pregnant women recruited by 16 weeks’ gestation in Ghana; age range 16–44 years; no stated diagnosed condition, with women taking other zinc supplements or with severe anaemia excluded. | 20 mg | — | 299 |