Vitamin A, Vitamin C and Selenium: study protocols
7 study groups took Vitamin A together with Vitamin C and Selenium. These are the doses the studies gave. They are not a recommendation.
Fewer than 5 study groups in one unit match, too few to draw the chart.
Dose per serving from research: Vitamin C
7 study groups in 5 studies say how much Vitamin C participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 250 mg to 500 mg, 43% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 25 mg to 50 mg | 2 |
| 50 mg to 100 mg | 2 |
| 100 mg to 250 mg | 0 |
| 250 mg to 500 mg | 3 |
Dose per serving from research: Selenium
7 study groups in 5 studies say how much Selenium participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 50 mcg to 100 mcg and 250 mcg to 500 mcg, 29% of 7 study groups each.
| Daily dose | Study groups |
|---|---|
| 5 mcg or less | 1 |
| 5 mcg to 10 mcg | 0 |
| 10 mcg to 25 mcg | 1 |
| 25 mcg to 50 mcg | 0 |
| 50 mcg to 100 mcg | 2 |
| 100 mcg to 250 mcg | 1 |
| 250 mcg to 500 mcg | 2 |
Commonly used together
7 of 7 study groups took Vitamin A, Vitamin C and Selenium with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Copper | 4 |
| Iron | 4 |
| Vitamin E | 4 |
| Zinc | 4 |
| Folic Acid | 3 |
| Iodine | 3 |
| Vitamin B12 | 3 |
7 study groups