Selenium, Vitamin A and Vitamin C: study protocols
9 study groups took Selenium together with Vitamin A and Vitamin C. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Selenium
9 study groups in 7 studies say how much Selenium participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 100 mcg to 250 mcg, 33% of 9 study groups.
| Daily dose | Study groups |
|---|---|
| 2.5 mcg to 5 mcg | 2 |
| 5 mcg to 10 mcg | 0 |
| 10 mcg to 25 mcg | 0 |
| 25 mcg to 50 mcg | 1 |
| 50 mcg to 100 mcg | 1 |
| 100 mcg to 250 mcg | 3 |
| 250 mcg to 500 mcg | 2 |
Dose per serving from research: Vitamin A
6 study groups in 6 studies say how much Vitamin A participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 100 mcg to 250 mcg and 500 mcg to 1 mg, 33% of 6 study groups each.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 2 |
| 250 mcg to 500 mcg | 1 |
| 500 mcg to 1 mg | 2 |
| 1 mg to 2.5 mg | 1 |
Dose per serving from research: Vitamin C
9 study groups in 7 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, 56% of 9 study groups.
| Daily dose | Study groups |
|---|---|
| 25 mg to 50 mg | 3 |
| 50 mg to 100 mg | 0 |
| 100 mg to 250 mg | 1 |
| 250 mg to 500 mg | 5 |
Commonly used together
9 of 9 study groups took Selenium, Vitamin A and Vitamin C with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Vitamin E | 6 |
| Beta-Carotene | 5 |
| Zinc | 4 |
| Copper | 3 |
| Iron | 3 |
9 study groups