Vitamin C, Zinc, Vitamin A and Iron: study protocols
7 study groups took Vitamin C together with Zinc, Vitamin A and Iron. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Vitamin C
7 study groups in 6 studies say how much Vitamin C participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 25 mg to 50 mg, 57% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg or less | 1 |
| 5 mg to 10 mg | 0 |
| 10 mg to 25 mg | 1 |
| 25 mg to 50 mg | 4 |
| 50 mg to 100 mg | 1 |
Dose per serving from research: Zinc
7 study groups in 6 studies say how much Zinc participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 2.5 mg to 5 mg, 57% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 2.5 mg or less | 1 |
| 2.5 mg to 5 mg | 4 |
| 5 mg to 10 mg | 1 |
| 10 mg to 25 mg | 0 |
| over 25 mg | 1 |
Dose per serving from research: Vitamin A
7 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: 250 mcg to 500 mcg, 57% of 7 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 2 |
| 250 mcg to 500 mcg | 4 |
| 500 mcg to 1 mg | 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 and 10 mg to 25 mg, 33% of 6 study groups each.
| Daily dose | Study groups |
|---|---|
| 2.5 mg to 5 mg | 1 |
| 5 mg to 10 mg | 2 |
| 10 mg to 25 mg | 2 |
| 25 mg to 50 mg | 1 |
Commonly used together
4 of 7 study groups took Vitamin C, Zinc, Vitamin A and Iron with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Folic Acid | 3 |
7 study groups