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All Iron study protocols

Iron, Vitamin A, Selenium, Zinc and Copper: study protocols

14 study groups took Iron together with Vitamin A, Selenium, Zinc and Copper. These are the doses the studies gave. They are not a recommendation.

Iron: what the research found →

Dose per serving from research: Iron

14 study groups in 11 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, 57% of 14 study groups.

Daily doseStudy groups
5 mg to 10 mg
4
10 mg to 25 mg
0
25 mg to 50 mg
8
50 mg to 100 mg
2

Dose per serving from research: Vitamin A

13 study groups in 10 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, 54% of 13 study groups.

Daily doseStudy groups
100 mcg to 250 mcg
2
250 mcg to 500 mcg
2
500 mcg to 1 mg
7
1 mg to 2.5 mg
2

Dose per serving from research: Selenium

13 study groups in 10 studies say how much Selenium participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 50 mcg to 100 mcg, 54% of 13 study groups.

Daily doseStudy groups
5 mcg or less
1
5 mcg to 10 mcg
1
10 mcg to 25 mcg
2
25 mcg to 50 mcg
0
50 mcg to 100 mcg
7
100 mcg to 250 mcg
2

Dose per serving from research: Zinc

14 study groups in 11 studies say how much Zinc participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 10 mg to 25 mg, 57% of 14 study groups.

Daily doseStudy groups
5 mg or less
1
5 mg to 10 mg
3
10 mg to 25 mg
8
25 mg to 50 mg
2

Dose per serving from research: Copper

14 study groups in 11 studies say how much Copper participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 1 mg to 2.5 mg, 43% of 14 study groups.

Daily doseStudy groups
250 mcg to 500 mcg
2
500 mcg to 1 mg
4
1 mg to 2.5 mg
6
2.5 mg to 5 mg
2

Commonly used together

14 of 14 study groups took Iron, Vitamin A, Selenium, Zinc and Copper with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken withStudy groups
Folic Acid
13
Iodine
13
Vitamin C
13
Vitamin E
13
Vitamin D
11
Niacin
10
Vitamin B12
9
Vitamin B6
9
Riboflavin
6
vitamin B-6
4

14 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 mg800 mcg65 mcg15 mg2 mg—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 mg800 mcg65 mcg15 mg2 mg——
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 mg800 mcg65 mcg15 mg2 mg——
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 mg114 mcg9.29 mcg2.14 mg286 mcg54 weeks1,469
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 mg800 mcg65 mcg15 mg2 mg180 days516
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 mg800 mcg65 mcg15 mg2 mg180 days515
Micronutrient fortified milk improves iron status, anemia and growth among children 1-4 years: a double masked, randomized, controlled trial
2010 · Micronutrient-fortified milk (MN group) · Children aged 1–4 years in India; many had anemia, iron deficiency, or growth faltering
9.6 mg156 mcg4.2 mcg7.8 mg270 mcg1 year316
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——15 mg2 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 mg400 mcg17 mcg10 mg560 mcg36 weeks852
Antenatal Multiple Micronutrient Supplementation Compared to Iron-Folic Acid Affects Micronutrient Status but Does Not Eliminate Deficiencies in a Randomized Controlled Trial Among Pregnant Women of Rural Bangladesh
2019 · MM · Pregnant women aged 12–45 years in rural Bangladesh
27 mg770 mcg60 mcg12 mg1 mg165 days749