Iron, Vitamin A, Niacin, Vitamin B6 and Folic Acid: study protocols
8 study groups took Iron together with Vitamin A, Niacin, Vitamin B6 and Folic Acid. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Iron
8 study groups in 6 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, 75% of 8 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg to 10 mg | 2 |
| 10 mg to 25 mg | 0 |
| 25 mg to 50 mg | 6 |
Dose per serving from research: Vitamin A
7 study groups in 5 studies say how much Vitamin A participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 500 mcg to 1 mg, 71% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 1 |
| 250 mcg to 500 mcg | 1 |
| 500 mcg to 1 mg | 5 |
Dose per serving from research: Niacin
8 study groups in 6 studies say how much Niacin participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 10 mg to 25 mg, 75% of 8 study groups.
| Daily dose | Study groups |
|---|---|
| 2.5 mg to 5 mg | 1 |
| 5 mg to 10 mg | 1 |
| 10 mg to 25 mg | 6 |
Dose per serving from research: Vitamin B6
8 study groups in 6 studies say how much Vitamin B6 participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 1 mg to 2.5 mg, 75% of 8 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg to 500 mcg | 2 |
| 500 mcg to 1 mg | 0 |
| 1 mg to 2.5 mg | 6 |
Dose per serving from research: Folic Acid
7 study groups in 5 studies say how much Folic Acid participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 250 mcg to 500 mcg, 86% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 1 |
| 250 mcg to 500 mcg | 6 |
Commonly used together
8 of 8 study groups took Iron, Vitamin A, Niacin, Vitamin B6 and Folic Acid with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Copper | 7 |
| Iodine | 7 |
| Selenium | 7 |
| Vitamin B12 | 7 |
| Vitamin C | 7 |
| Vitamin D | 7 |
| Vitamin E | 7 |
| Zinc | 7 |
| Riboflavin | 5 |
| Thiamine | 3 |
8 study groups
| Study | |||||||
|---|---|---|---|---|---|---|---|
| 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 | 800 mcg | 18 mg | 1.9 mg | 400 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 | 800 mcg | 18 mg | 1.9 mg | 400 mcg | — | — |
| Modifying effects of maternal Hb concentration on infant birth weight in women receiving prenatal iron-containing supplements: a randomised controlled trial 2016 · MMN group · Pregnant women aged at least 20 years, nulliparous, with Hb concentration ≥100 g/L and enrolled before 20 weeks of gestation | 30 mg | 800 mcg | 18 mg | 1.9 mg | 400 mcg | — | — |
| 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 | 114 mcg | 2.57 mg | 271 mcg | 400 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 | 800 mcg | 18 mg | 1.9 mg | 400 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 | 800 mcg | 18 mg | 1.9 mg | 400 mcg | 180 days | 515 |
| Associations of antenatal micronutrient supplementation with adolescent blood pressure: evidence from a 14-year follow-up study of a randomized controlled trial 2025 · Multiple micronutrients (MMNs; UNIMMAP formulation) · Pregnant women less than 28 weeks of gestation; offspring were followed up at ages 10–14 years | 30 mg | — | 18 mg | 1.9 mg | — | — | — |
| Iron status and inherited haemoglobin disorders modify the effects of micronutrient powders on linear growth and morbidity among young Lao children in a double-blind randomised trial 2019 · MNP group · Children aged 6–23 months in rural Lao PDR; young children, including children with anaemia and inherited haemoglobin disorders | 6 mg | 400 mcg | 6 mg | 500 mcg | 150 mcg | 36 weeks | 852 |