All Iron study protocols

Iron, Selenium, Vitamin A, Niacin and Riboflavin: study protocols

9 study groups took Iron together with Selenium, Vitamin A, Niacin 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

9 study groups in 7 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, 44% of 9 study groups.

Daily dose	Study groups
5 mg to 10 mg	4
10 mg to 25 mg	1
25 mg to 50 mg	2
50 mg to 100 mg	2

Dose per serving from research: Selenium

9 study groups in 7 studies say how much Selenium participants took a day.

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

Most common: 5 mcg to 10 mcg and 10 mcg to 25 mcg and 50 mcg to 100 mcg and 100 mcg to 250 mcg, 22% of 9 study groups each.

Daily dose	Study groups
5 mcg to 10 mcg	2
10 mcg to 25 mcg	2
25 mcg to 50 mcg	1
50 mcg to 100 mcg	2
100 mcg to 250 mcg	2

Dose per serving from research: Vitamin A

9 study groups in 7 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, 33% of 9 study groups.

Daily dose	Study groups
100 mcg to 250 mcg	2
250 mcg to 500 mcg	2
500 mcg to 1 mg	3
1 mg to 2.5 mg	2

Dose per serving from research: Niacin

9 study groups in 7 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, 33% of 9 study groups.

Daily dose	Study groups
2.5 mg to 5 mg	2
5 mg to 10 mg	2
10 mg to 25 mg	3
25 mg to 50 mg	2

Dose per serving from research: Riboflavin

9 study groups in 7 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, 33% of 9 study groups.

Daily dose	Study groups
100 mcg to 250 mcg	2
250 mcg to 500 mcg	2
500 mcg to 1 mg	0
1 mg to 2.5 mg	3
2.5 mg to 5 mg	2

Commonly used together

9 of 9 study groups took Iron, Selenium, Vitamin A, Niacin and Riboflavin with something else. Shown: what 3 or more different studies gave. The 10 most common of 11.

What was given together, not what works together.

Taken with	Study groups
Copper	9
Iodine	9
Zinc	9
Folic Acid	8
Vitamin B6	7
Vitamin C	7
Vitamin D	7
Vitamin E	7
Vitamin B12	5
thiamin	5

9 study groups

Study
Effects of multimicronutrient supplementation on helminth reinfection: a randomized, controlled trial in Kenyan schoolchildren 2003 · multimicronutrient supplementation · Schoolchildren in Nyanza Province, Kenya; age and sex not specified	18 mg	40 mcg	1 mg	16 mg	1.6 mg	335 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	9.29 mcg	114 mcg	2.57 mg	200 mcg	54 weeks	1,469
Effects of therapeutic zinc supplementation for diarrhea and two preventive zinc supplementation regimens on the incidence and duration of diarrhea and acute respiratory tract infections in rural Laotian children: A randomized controlled trial 2020 · MNP group · Children aged 6–23 months in rural Laos	6 mg	17 mcg	400 mcg	6 mg	500 mcg	40 weeks	852
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	65 mcg	800 mcg	18 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	65 mcg	800 mcg	18 mg	1.4 mg	180 days	515
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	17 mcg	400 mcg	6 mg	500 mcg	36 weeks	852
Impact of Preconception Micronutrient Supplementation on Anemia and Iron Status during Pregnancy and Postpartum: A Randomized Controlled Trial in Rural Vietnam 2016 · Multiple micronutrients (MM) · Women aged 18–40 planning pregnancy in rural Vietnam; no specific diagnosed condition required	8.57 mg	9.29 mcg	114 mcg	2.57 mg	200 mcg	56 weeks	508
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	130 mcg	1.6 mg	36 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	130 mcg	1.6 mg	36 mg	2.8 mg	184 days	75

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