Vitamin A and Vitamin E: study protocols
14 study groups took Vitamin A together with Vitamin E. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Vitamin A
9 study groups in 9 studies say how much Vitamin A participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 1,000 IU to 2,500 IU and 2,500 IU to 5,000 IU, 33% of 9 study groups each.
| Daily dose | Study groups |
|---|---|
| 1,000 IU to 2,500 IU | 3 |
| 2,500 IU to 5,000 IU | 3 |
| 5,000 IU to 10,000 IU | 0 |
| 10,000 IU to 25,000 IU | 2 |
| over 25,000 IU | 1 |
Dose per serving from research: Vitamin E
12 study groups in 12 studies say how much Vitamin E participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 5 mg to 10 mg, 33% of 12 study groups.
| Daily dose | Study groups |
|---|---|
| 2.5 mg to 5 mg | 2 |
| 5 mg to 10 mg | 4 |
| 10 mg to 25 mg | 2 |
| 25 mg to 50 mg | 3 |
| over 50 mg | 1 |
Commonly used together
11 of 14 study groups took Vitamin A and Vitamin E 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 |
|---|---|
| Vitamin C | 10 |
| Copper | 7 |
| Iron | 7 |
| Vitamin B12 | 7 |
| Zinc | 7 |
| Vitamin B6 | 6 |
| Folic Acid | 5 |
| Iodine | 5 |
| Vitamin D | 5 |
| Selenium | 4 |
14 study groups
| Study | ||||
|---|---|---|---|---|
| Reduced mortality among children in southern India receiving a small weekly dose of vitamin A 1990 · treated group · Preschool-age children in southern India | 1,190 IU | 2.86 mg | 1 year | — |
| Antioxidant vitamins or lactulose for the prevention of the recurrence of colorectal adenomas. Colorectal Cancer Study Group of the University of Modena and the Health Care District 16 1993 · Group 1 (vitamins) · Individuals after endoscopic polypectomy; age and sex not reported; adenomas were the condition of interest. | 30,000 IU | 70 mg | 548 days | — |
| 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 | 10 mg | — | — |
| Multivitamin supplementation of HIV-positive women during pregnancy reduces hypertension 2005 · Multivitamin plus vitamin A · HIV-positive pregnant Tanzanian women | 5,000 IU | 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 | 6 mg | 548 days | — |
| Supplementation with multivitamins and vitamin A and incidence of malaria among HIV-infected Tanzanian women 2014 · multivitamins with vitamin A · HIV-infected pregnant women in Tanzania | 5,000 IU | 30 mg | 1249 days | — |
| Natural history of retinitis pigmentosa based on genotype, vitamin A/E supplementation, and an electroretinogram biomarker 2023 · A plus E · Patients with typical retinitis pigmentosa; age and sex not specified | 15,000 IU | — | 6 years | — |
| A randomized trial of vitamin A and vitamin E supplementation for retinitis pigmentosa 1993 · Vitamin A plus vitamin E · Patients aged 18 through 49 years with retinitis pigmentosa | 15,000 IU | 400 IU | 6 years | — |
| 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 | 156 mcg | 7.5 mg | 1 year | 316 |
| 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 · Multiple micronutrients · 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 | 6 mg | 548 days | 126 |