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Iron and Zinc: study protocols

68 study groups took Iron together with Zinc. These are the doses the studies gave. They are not a recommendation.

Iron: what the research found →

Dose per serving from research: Iron

68 study groups in 54 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, 37% of 68 study groups.

Daily doseStudy groups
2.5 mg to 5 mg
6
5 mg to 10 mg
25
10 mg to 25 mg
14
25 mg to 50 mg
13
50 mg to 100 mg
10

Dose per serving from research: Zinc

66 study groups in 53 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, 35% of 66 study groups.

Daily doseStudy groups
2.5 mg or less
2
2.5 mg to 5 mg
15
5 mg to 10 mg
23
10 mg to 25 mg
18
25 mg to 50 mg
8

Commonly used together

52 of 68 study groups took Iron and Zinc 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
35
Folic Acid
31
Vitamin C
22
Copper
20
Iodine
17
Selenium
15
Vitamin E
15
Vitamin B12
14
Vitamin D
14
Niacin
12

68 study groups

Study
Effect of prenatal zinc supplementation on birthweight
2009 · Iron-zinc group · Pregnant women recruited by 16 weeks’ gestation in Ghana; age range 16–44 years; no stated diagnosed condition, with women taking other zinc supplements or with severe anaemia excluded.
20 mg20 mg—299
Effects of iron and zinc supplementation in Indonesian infants on micronutrient status and growth
2001 · iron + zinc · Indonesian infants, 4 months of age
10 mg10 mg26 weeks—
Combined iron and zinc supplementation in infants improved iron and zinc status, but interactions reduced efficacy in a multicountry trial in southeast Asia
2007 · iron and zinc · Infants aged 4–6 months
10 mg10 mg26 weeks—
Zinc supplementation reduced morbidity, but neither zinc nor iron supplementation affected growth or body composition of Mexican preschoolers
1997 · zinc + iron · Mexican preschool children in a rural community
20 mg20 mg1 year—
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 mg15 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 mg15 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 mg15 mg——
Predictors of Anaemia Among Young Children Receiving Daily Micronutrient Powders (MNPs) for 24 Weeks in Bangladesh: A Secondary Analysis of the Zinc in Powders Trial
2025 · standard MNP daily group · Children aged 9–11 months at enrolment in Bangladesh
10 mg4.1 mg24 weeks481
Home-fortification with iron and zinc sprinkles or iron sprinkles alone successfully treats anemia in infants and young children
2003 · FeZn (combined supplementation group) · Anemic infants in rural Ghana; mean age 10.3 ± 2.5 months
80 mg10 mg60 days—
Simultaneous weekly supplementation of iron and zinc is associated with lower morbidity due to diarrhea and acute lower respiratory infection in Bangladeshi infants
2003 · 20 mg iron and 20 mg zinc with 1 mg riboflavin · Infants aged 6 months at enrollment, followed until 12 months
2.86 mg2.86 mg183 days—
Iron and Zinc: study protocols | supp.fit