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Iron, Selenium, Zinc and Copper: study protocols

25 study groups took Iron together with 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

25 study groups in 22 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, 44% of 25 study groups.

Daily doseStudy groups
5 mg to 10 mg
7
10 mg to 25 mg
3
25 mg to 50 mg
11
50 mg to 100 mg
4

Dose per serving from research: Selenium

24 study groups in 21 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, 50% of 24 study groups.

Daily doseStudy groups
2.5 mcg to 5 mcg
2
5 mcg to 10 mcg
2
10 mcg to 25 mcg
3
25 mcg to 50 mcg
2
50 mcg to 100 mcg
12
100 mcg to 250 mcg
3

Dose per serving from research: Zinc

25 study groups in 22 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, 56% of 25 study groups.

Daily doseStudy groups
2.5 mg or less
2
2.5 mg to 5 mg
0
5 mg to 10 mg
6
10 mg to 25 mg
14
25 mg to 50 mg
3

Dose per serving from research: Copper

25 study groups in 22 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, 52% of 25 study groups.

Daily doseStudy groups
250 mcg to 500 mcg
4
500 mcg to 1 mg
5
1 mg to 2.5 mg
13
2.5 mg to 5 mg
3

Commonly used together

24 of 25 study groups took Iron, Selenium, Zinc and Copper with something else. Shown: what 3 or more different studies gave. The 10 most common of 15.

What was given together, not what works together.

Taken withStudy groups
Vitamin A
23
Folic Acid
21
Iodine
21
Vitamin C
21
Vitamin E
21
Vitamin D
18
Niacin
17
Vitamin B12
17
Vitamin B6
17
Riboflavin
9

25 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 mg65 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 mg65 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 mg65 mcg15 mg2 mg——
Effects of fortified milk on morbidity in young children in north India: community based, randomised, double masked placebo controlled trial
2007 · fortified milk · Children aged 1–3 years in a peri-urban settlement in north India
9.6 mg4.2 mcg7.8 mg270 mcg1 year316
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 mg40 mcg20 mg2 mg335 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 mg9.29 mcg2.14 mg286 mcg54 weeks1,469
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 mg17 mcg10 mg560 mcg40 weeks852
Effects of antenatal multiple micronutrient supplementation on children's weight and size at 2 years of age in Nepal: follow-up of a double-blind randomised controlled trial
2008 · intervention group · Pregnant women enrolled at no earlier than 12 weeks’ gestation, with singleton pregnancies and gestation up to 20 completed weeks
30 mg65 mcg15 mg2 mg—600
Effect of antenatal multiple micronutrient supplementation on anthropometry and blood pressure in mid-childhood in Nepal: follow-up of a double-blind randomised controlled trial
2014 · intervention group (multiple micronutrient supplement) · Pregnant women attending antenatal care in Nepal; no specific age range or deficiency criterion stated
30 mg65 mcg15 mg2 mg—600
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 mg65 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 mg65 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 mg4.2 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 mg17 mcg10 mg560 mcg36 weeks852
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 mg9.29 mcg2.14 mg286 mcg56 weeks508
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 mg60 mcg12 mg1 mg165 days749
Including 60 mg Elemental Iron in a Multiple Micronutrient Supplement Blunts the Increase in Serum Zinc after 12 Weeks of Daily Supplementation in Predominantly Anemic, Nonpregnant Cambodian Women of Reproductive Age
2019 · Fe + MMN · Predominantly anemic, nonpregnant women aged 18–45 years
60 mg65 mcg15 mg2 mg12 weeks206
Newborn micronutrient status biomarkers in a cluster-randomized trial of antenatal multiple micronutrient compared with iron folic acid supplementation in rural Bangladesh
2020 · MM · Pregnant women in rural Bangladesh; age range not specified; no disease condition specified
27 mg60 mcg12 mg1 mg—176
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 mg130 mcg30 mg4 mg184 days75
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 mg130 mcg30 mg4 mg184 days75
Effects of prenatal micronutrient and early food supplementation on metabolic status of the offspring at 4.5 years of age. The MINIMat randomized trial in rural Bangladesh
2016 · MMS · Pregnant women in rural Bangladesh; offspring assessed at 4.5 years
30 mg65 mcg15 mg2 mg—439
Maternal cortisol and stress are associated with birth outcomes, but are not affected by lipid-based nutrient supplements during pregnancy: an analysis of data from a randomized controlled trial in rural Malawi
2015 · MMN · Pregnant women aged 15–49 years in rural Malawi, enrolled at up to 20 weeks of gestation
20 mg130 mcg30 mg4 mg—415
Multiple micronutrient supplementation improves micronutrient status in primary school children in Hai Phong City, Vietnam: a randomised controlled trial
2021 · intervention · Children aged 6–9 years, apparently healthy, in rural Hai Phong City, Vietnam; included undernourished, normal-weight, and overweight/obese children
10 mg17 mcg10 mg560 mcg22 weeks175
Prophylactic iron supplementation in pregnant women in Norway
2001 · 15 mg iron daily · Non-anaemic pregnant women, allocated at about 10 weeks of pregnancy
15 mg50 mcg10 mg2 mg——
Host iron status and erythropoietic response to iron supplementation determines susceptibility to the RBC stage of falciparum malaria during pregnancy
2017 · Reference (standard-of-care) arm · Pregnant women aged 18–45 years, recruited at 14–22 weeks’ gestation in rural Gambia; healthy at enrolment, with varying anaemia and iron status
60 mg65 mcg15 mg2 mg12 weeks—
Iron, Selenium, Zinc and Copper: study protocols | supp.fit