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Vitamin B12, Iron and Vitamin B6: study protocols

7 study groups took Vitamin B12 together with Iron 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

7 study groups in 6 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, 43% of 7 study groups.

Daily doseStudy groups
1 mcg or less
1
1 mcg to 2.5 mcg
2
2.5 mcg to 5 mcg
3
over 5 mcg
1

Dose per serving from research: Iron

6 study groups in 5 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, 50% of 6 study groups.

Daily doseStudy groups
5 mg to 10 mg
3
10 mg to 25 mg
1
25 mg to 50 mg
2

Dose per serving from research: Vitamin B6

7 study groups in 6 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, 71% of 7 study groups.

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

Commonly used together

7 of 7 study groups took Vitamin B12, Iron and Vitamin B6 with something else. Shown: what 3 or more different studies gave. The 10 most common of 12.

What was given together, not what works together.

Taken withStudy groups
Riboflavin
6
Vitamin D
6
Folic Acid
5
Thiamine
5
Zinc
5
Copper
4
Iodine
4
Vitamin A
4
Vitamin E
4
Niacin
3

7 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—2.2 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 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 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 mg500 mcg36 weeks130
Fortified breakfast cereal consumed daily for 12 wk leads to a significant improvement in micronutrient intake and micronutrient status in adolescent girls: a randomised controlled trial
2016 · Fortified cereal, morning · Females aged 16–19 years who regularly skipped breakfast and had low riboflavin status and haemoglobin; no diagnosed illness
1.45 mcg6.5 mg1.74 mg12 weeks18
Fortified breakfast cereal consumed daily for 12 wk leads to a significant improvement in micronutrient intake and micronutrient status in adolescent girls: a randomised controlled trial
2016 · Fortified cereal, evening · Females aged 16–19 years who regularly skipped breakfast and had low riboflavin status and haemoglobin; no diagnosed illness
1.45 mcg6.5 mg1.74 mg12 weeks16
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 mg1.9 mg12 weeks105