Vitamin A and Zinc: study protocols
25 study groups took Vitamin A together with Zinc. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Vitamin A
17 study groups in 12 studies say how much Vitamin A participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 250 mcg to 500 mcg, 53% of 17 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 2 |
| 250 mcg to 500 mcg | 9 |
| 500 mcg to 1 mg | 5 |
| 1 mg to 2.5 mg | 0 |
| over 2.5 mg | 1 |
Dose per serving from research: Zinc
24 study groups in 17 studies say how much Zinc participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 2.5 mg to 5 mg and 5 mg to 10 mg, 33% of 24 study groups each.
| Daily dose | Study groups |
|---|---|
| 2.5 mg to 5 mg | 8 |
| 5 mg to 10 mg | 8 |
| 10 mg to 25 mg | 4 |
| 25 mg to 50 mg | 4 |
Commonly used together
20 of 25 study groups took Vitamin A and Zinc with something else. Shown: what 3 or more different studies gave. The 10 most common of 14.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Iron | 18 |
| Vitamin C | 11 |
| Folic Acid | 9 |
| Copper | 6 |
| Vitamin B12 | 6 |
| Vitamin E | 6 |
| Iodine | 5 |
| Vitamin B6 | 4 |
| Vitamin D | 4 |
| Niacin | 3 |
25 study groups
| Study | ||||
|---|---|---|---|---|
| Impact of iron fortification on anaemia and iron deficiency among pre-school children living in Rural Ghana 2021 · non-iron MNP group · Children aged 6–35 months living in rural Ghana; children with severe anaemia, severe malnutrition, recent iron supplementation, or chronic disease were excluded. | 400 mcg | 5 mg | 150 days | 991 |
| Vitamin A and Zinc Supplementation Among Pregnant Women to Prevent Placental Malaria: A Randomized, Double-Blind, Placebo-Controlled Trial in Tanzania 2017 · vitamin A and zinc group · Pregnant women in their first trimester, primigravid or secundigravid, HIV-negative | 2,500 IU | 25 mg | — | 625 |
| Simultaneous zinc and vitamin A supplementation in Bangladeshi children: randomised double blind controlled trial 2001 · zinc and vitamin A · Children aged 12–35 months living in urban slums of Dhaka, Bangladesh | 200,000 IU | 20 mg | 2 weeks | — |
| Effect of micronutrient supplementation on diarrhoeal disease among stunted children in rural South Africa 2009 · vitamin A plus zinc · children aged 6–24 months; three cohorts: HIV-infected children, HIV-uninfected children born to HIV-infected mothers, and HIV-uninfected children born to HIV-uninfected mothers | 1,250 IU | 10 mg | 548 days | — |
| Impact of iron fortification on anaemia and iron deficiency among pre-school children living in Rural Ghana 2021 · iron-MNP group · Children aged 6–35 months living in rural Ghana; children with severe anaemia, severe malnutrition, recent iron supplementation, or chronic disease were excluded. | 400 mcg | 5 mg | 150 days | 967 |
| Effects of maternal micronutrient supplementation on fetal loss and infant mortality: a cluster-randomized trial in Nepal 2003 · Folic acid + iron + zinc · Pregnant women in rural Nepal | 1 mg | 30 mg | — | — |
| Effects of maternal micronutrient supplementation on fetal loss and infant mortality: a cluster-randomized trial in Nepal 2003 · Multiple micronutrients · Pregnant women in rural Nepal | 1 mg | 30 mg | — | — |
| Effect of micronutrient supplementation on diarrhoeal disease among stunted children in rural South Africa 2009 · multiple micronutrients · children aged 6–24 months; three cohorts: HIV-infected children, HIV-uninfected children born to HIV-infected mothers, and HIV-uninfected children born to HIV-uninfected mothers | 1,250 IU | 10 mg | 548 days | — |
| Effect on longitudinal growth and anemia of zinc or multiple micronutrients added to vitamin A: a randomized controlled trial in children aged 6-24 months 2010 · Vitamin A + zinc · Children enrolled at 6 months and followed to 24 months in rural South Africa; HIV-infected and HIV-uninfected children, both sexes | 1,250 IU | 10 mg | 548 days | 123 |
| Double-blind, randomized, controlled trial of zinc or vitamin A supplementation in young children with acute diarrhoea 1999 · vitamin A plus zinc · Children aged 6 months to 2 years with acute watery diarrhoea of 3 days or less and some dehydration | 4.5 mg | — | 15 days | — |