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Vitamin B12, Iron, Zinc and Vitamin B6: study protocols

5 study groups took Vitamin B12 together with Iron, Zinc and Vitamin B6. These are the doses the studies gave. They are not a recommendation.

Vitamin B12: what the research found →

Dose per serving from research: Vitamin B12

5 study groups in 5 studies say how much Vitamin B12 participants took a day.

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

Most common: 2.5 mcg to 5 mcg, 60% of 5 study groups.

Daily doseStudy groups
1 mcg or less
1
1 mcg to 2.5 mcg
0
2.5 mcg to 5 mcg
3
over 5 mcg
1

Dose per serving from research: Zinc

5 study groups in 5 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 and 10 mg to 25 mg, 40% of 5 study groups each.

Daily doseStudy groups
5 mg to 10 mg
2
10 mg to 25 mg
2
25 mg to 50 mg
1

Dose per serving from research: Vitamin B6

5 study groups in 5 studies say how much Vitamin B6 participants took a day.

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

Most common: 1 mg to 2.5 mg, 60% of 5 study groups.

Daily doseStudy groups
500 mcg or less
1
500 mcg to 1 mg
0
1 mg to 2.5 mg
3
2.5 mg to 5 mg
1

Commonly used together

5 of 5 study groups took Vitamin B12, Iron, Zinc and Vitamin B6 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 withStudy groups
Folic Acid
5
Copper
4
Iodine
4
Riboflavin
4
Vitamin A
4
Vitamin D
4
Vitamin E
4
Niacin
3
Selenium
3
Thiamine
3

5 study groups

Study
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
2.6 mcg—30 mg2.2 mg——
Maternal B-vitamin and vitamin D status before, during, and after pregnancy and the influence of supplementation preconception and during pregnancy: Prespecified secondary analysis of the NiPPeR double-blind randomized controlled trial
2023 · intervention · Women planning pregnancy; generally healthy, recruited before conception
5.2 mcg12 mg10 mg2.6 mg—870
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
2.6 mcg27 mg12 mg1.9 mg—176
Daily supplementation of a multiple micronutrient powder improves folate but not thiamine, riboflavin, or vitamin B(12) status among young Laotian children: a randomized controlled trial
2022 · micronutrient powder group (MNP) · Children aged 6–23 months in rural Lao PDR; no disease-based selection, with high prevalence of undernutrition and micronutrient deficiencies
0.9 mcg6 mg10 mg500 mcg36 weeks130
A novel nutritional supplement to reduce plasma homocysteine in nonpregnant women: A randomised controlled trial in The Gambia
2019 · UNIMMAP tablet · Nonpregnant, non-lactating healthy women aged 18–45 years in West Kiang, The Gambia; women of reproductive age with common micronutrient deficiencies in the population
2.6 mcg30 mg15 mg1.9 mg12 weeks105