Iron and Iodine: study protocols
23 study groups took Iron together with Iodine. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Iron
23 study groups in 18 studies say how much Iron participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 25 mg to 50 mg, 35% of 23 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg or less | 1 |
| 5 mg to 10 mg | 6 |
| 10 mg to 25 mg | 6 |
| 25 mg to 50 mg | 8 |
| 50 mg to 100 mg | 2 |
Dose per serving from research: Iodine
20 study groups in 15 studies say how much Iodine participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 100 mcg to 250 mcg, 55% of 20 study groups.
| Daily dose | Study groups |
|---|---|
| 25 mcg or less | 1 |
| 25 mcg to 50 mcg | 3 |
| 50 mcg to 100 mcg | 3 |
| 100 mcg to 250 mcg | 11 |
| 250 mcg to 500 mcg | 2 |
Commonly used together
20 of 23 study groups took Iron and Iodine with something else. Shown: what 3 or more different studies gave. The 10 most common of 15.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Zinc | 17 |
| Folic Acid | 16 |
| Vitamin A | 16 |
| Copper | 15 |
| Vitamin C | 14 |
| Vitamin D | 14 |
| Vitamin E | 14 |
| Selenium | 13 |
| Vitamin B12 | 13 |
| Niacin | 12 |
23 study groups
| Study | ||||
|---|---|---|---|---|
| Impact of micronutrient supplementation during pregnancy on birth weight, duration of gestation, and perinatal mortality in rural western China: double blind cluster randomised controlled trial 2008 · Multiple micronutrients · Pregnant women resident in disadvantaged rural counties in Shaanxi Province, China; eligible women enrolled before 28 weeks’ gestation | 30 mg | 150 mcg | — | 1,899 |
| Equity in adherence to and effect of prenatal food and micronutrient supplementation on child mortality: results from the MINIMat randomized trial, Bangladesh 2014 · EMMS (early food invitation; multiple micronutrients) · Pregnant women in rural Bangladesh, enrolled before 14 weeks’ gestation | 30 mg | 150 mcg | — | — |
| Equity in adherence to and effect of prenatal food and micronutrient supplementation on child mortality: results from the MINIMat randomized trial, Bangladesh 2014 · UMMS (usual food invitation; multiple micronutrients) · Pregnant women in rural Bangladesh, enrolled before 14 weeks’ gestation | 30 mg | 150 mcg | — | — |
| Effectiveness of a home fortification programme with multiple micronutrients on infant and young child development: a cluster-randomised trial in rural Bihar, India 2018 · intervention group · Children aged 6–18 months in rural Bihar, India | 12.5 mg | 90 mcg | 1 year | 2,170 |
| Dual fortification of salt with iron and iodine in women and children in rural Ghana 2007 · Iodised salt plus weekly 70 mg iron supplement (women) · Mildly anaemic or non-anaemic, non-pregnant, non-lactating women | 10 mg | — | 240 days | 65 |
| Dual fortification of salt with iodine and micronized ferric pyrophosphate: a randomized, double-blind, controlled trial 2004 · dual-fortified salt (DFS) group · Iodine-deficient children aged 6–15 years in rural northern Morocco, with a high prevalence of anemia | 18 mg | — | 304 days | — |
| Effect of micronutrient supplementation on diarrhoeal disease among stunted children in rural South Africa 2009 · multiple micronutrients · children aged 6–24 months; three cohorts: HIV-infected children, HIV-uninfected children born to HIV-infected mothers, and HIV-uninfected children born to HIV-uninfected mothers | 10 mg | 50 mcg | 548 days | — |
| Predictors of adherence to micronutrient supplementation before and during pregnancy in Vietnam 2017 · MM (multiple micronutrients) preconception group · Women of reproductive age in Vietnam intending to become pregnant | 8.57 mg | 21.4 mcg | 54 weeks | 1,469 |
| Assessing the adherence and acceptability to iron and folic acid compared with multiple micronutrient supplements during pregnancy: a cluster-randomized noninferiority trial in Cambodia 2025 · MMS-180 · Healthy pregnant individuals aged 18–45 years, in the first 14 weeks of a low-risk singleton pregnancy | 30 mg | 150 mcg | 180 days | 516 |
| Assessing the adherence and acceptability to iron and folic acid compared with multiple micronutrient supplements during pregnancy: a cluster-randomized noninferiority trial in Cambodia 2025 · MMS-90 · Healthy pregnant individuals aged 18–45 years, in the first 14 weeks of a low-risk singleton pregnancy | 30 mg | 150 mcg | 180 days | 515 |