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Iron, Zinc, Folic Acid, Vitamin B6 and Riboflavin: study protocols

5 study groups took Iron together with Zinc, Folic Acid, Vitamin B6 and Riboflavin. These are the doses the studies gave. They are not a recommendation.

Iron: what the research found →

Dose per serving from research: Iron

5 study groups in 4 studies say how much Iron participants took a day.

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

Most common: 5 mg to 10 mg and 25 mg to 50 mg, 40% of 5 study groups each.

Daily doseStudy groups
5 mg to 10 mg
2
10 mg to 25 mg
1
25 mg to 50 mg
2

Dose per serving from research: Zinc

5 study groups in 4 studies say how much Zinc participants took a day.

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

Most common: 5 mg to 10 mg and 10 mg to 25 mg, 40% of 5 study groups each.

Daily doseStudy groups
2.5 mg or less
1
2.5 mg to 5 mg
0
5 mg to 10 mg
2
10 mg to 25 mg
2

Dose per serving from research: Folic Acid

5 study groups in 4 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, 80% of 5 study groups.

Daily doseStudy groups
100 mcg to 250 mcg
1
250 mcg to 500 mcg
4

Dose per serving from research: Vitamin B6

5 study groups in 4 studies say how much Vitamin B6 participants took a day.

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

Most common: 250 mcg to 500 mcg and 1 mg to 2.5 mg, 40% of 5 study groups each.

Daily doseStudy groups
250 mcg to 500 mcg
2
500 mcg to 1 mg
0
1 mg to 2.5 mg
2
over 2.5 mg
1

Dose per serving from research: Riboflavin

5 study groups in 4 studies say how much Riboflavin participants took a day.

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

Most common: 1 mg to 2.5 mg, 60% of 5 study groups.

Daily doseStudy groups
250 mcg or less
1
250 mcg to 500 mcg
1
500 mcg to 1 mg
0
1 mg to 2.5 mg
3

Commonly used together

5 of 5 study groups took Iron, Zinc, Folic Acid, Vitamin B6 and Riboflavin with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken withStudy groups
Iodine
5
Copper
4
Niacin
4
Selenium
4
Vitamin A
4
Vitamin B12
4
Vitamin D
4

5 study groups

Study
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 mg2.14 mg400 mcg271 mcg200 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 mg15 mg400 mcg1.9 mg1.4 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 mg15 mg400 mcg1.9 mg1.4 mg180 days515
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 mg10 mg150 mcg500 mcg500 mcg36 weeks852
Maternal B-vitamin and vitamin D status before, during, and after pregnancy and the influence of supplementation preconception and during pregnancy: Prespecified secondary analysis of the NiPPeR double-blind randomized controlled trial
2023 · intervention · Women planning pregnancy; generally healthy, recruited before conception
12 mg10 mg400 mcg2.6 mg1.8 mg—870