All Iron study protocols

Iron, Zinc, Selenium, Vitamin C and Riboflavin: study protocols

5 study groups took Iron together with Zinc, Selenium, Vitamin C 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 3 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 and 50 mg to 100 mg, 40% of 5 study groups each.

Daily dose	Study groups
10 mg or less	1
10 mg to 25 mg	0
25 mg to 50 mg	2
50 mg to 100 mg	2

Dose per serving from research: Zinc

5 study groups in 3 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 and 25 mg to 50 mg, 40% of 5 study groups each.

Daily dose	Study groups
2.5 mg or less	1
2.5 mg to 5 mg	0
5 mg to 10 mg	0
10 mg to 25 mg	2
25 mg to 50 mg	2

Dose per serving from research: Selenium

5 study groups in 3 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 and 100 mcg to 250 mcg, 40% of 5 study groups each.

Daily dose	Study groups
10 mcg or less	1
10 mcg to 25 mcg	0
25 mcg to 50 mcg	0
50 mcg to 100 mcg	2
100 mcg to 250 mcg	2

Dose per serving from research: Vitamin C

5 study groups in 3 studies say how much Vitamin C participants took a day.

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

Most common: 50 mg to 100 mg and 100 mg to 250 mg, 40% of 5 study groups each.

Daily dose	Study groups
10 mg or less	1
10 mg to 25 mg	0
25 mg to 50 mg	0
50 mg to 100 mg	2
100 mg to 250 mg	2

Dose per serving from research: Riboflavin

5 study groups in 3 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 and 2.5 mg to 5 mg, 40% of 5 study groups each.

Daily dose	Study groups
250 mcg or less	1
250 mcg to 500 mcg	0
500 mcg to 1 mg	0
1 mg to 2.5 mg	2
2.5 mg to 5 mg	2

Commonly used together

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

What was given together, not what works together.

Taken with	Study groups
Copper	5
Folic Acid	5
Iodine	5
Niacin	5
Vitamin A	5
Vitamin D	5
Vitamin E	5

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 mg	2.14 mg	9.29 mcg	10 mg	200 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	15 mg	65 mcg	70 mg	1.4 mg	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	15 mg	65 mcg	70 mg	1.4 mg	180 days	515
mRNA Levels of Placental Iron and Zinc Transporter Genes Are Upregulated in Gambian Women with Low Iron and Zinc Status 2017 · MMN group · Pregnant women aged 18–45 years with singleton pregnancies under 20 weeks in rural Gambia	60 mg	30 mg	130 mcg	140 mg	2.8 mg	184 days	75
mRNA Levels of Placental Iron and Zinc Transporter Genes Are Upregulated in Gambian Women with Low Iron and Zinc Status 2017 · PE+MMN group · Pregnant women aged 18–45 years with singleton pregnancies under 20 weeks in rural Gambia	60 mg	30 mg	130 mcg	140 mg	2.8 mg	184 days	75