Folic Acid, Vitamin C, Vitamin A and Zinc: study protocols
15 study groups took Folic Acid together with Vitamin C, Vitamin A and Zinc. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Folic Acid
15 study groups in 12 studies say how much Folic Acid participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 250 mcg to 500 mcg, 67% of 15 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg or less | 1 |
| 100 mcg to 250 mcg | 2 |
| 250 mcg to 500 mcg | 10 |
| 500 mcg to 1 mg | 2 |
Dose per serving from research: Vitamin C
14 study groups in 11 studies say how much Vitamin C participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 50 mg to 100 mg, 57% of 14 study groups.
| Daily dose | Study groups |
|---|---|
| 10 mg or less | 1 |
| 10 mg to 25 mg | 0 |
| 25 mg to 50 mg | 3 |
| 50 mg to 100 mg | 8 |
| 100 mg to 250 mg | 2 |
Dose per serving from research: Vitamin A
14 study groups in 11 studies say how much Vitamin A participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 500 mcg to 1 mg, 64% of 14 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg to 250 mcg | 1 |
| 250 mcg to 500 mcg | 2 |
| 500 mcg to 1 mg | 9 |
| 1 mg to 2.5 mg | 2 |
Dose per serving from research: Zinc
15 study groups in 12 studies say how much Zinc participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 10 mg to 25 mg, 53% of 15 study groups.
| Daily dose | Study groups |
|---|---|
| 2.5 mg or less | 1 |
| 2.5 mg to 5 mg | 2 |
| 5 mg to 10 mg | 1 |
| 10 mg to 25 mg | 8 |
| 25 mg to 50 mg | 3 |
Commonly used together
15 of 15 study groups took Folic Acid, Vitamin C, Vitamin A and Zinc 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 with | Study groups |
|---|---|
| Iron | 14 |
| Copper | 13 |
| Vitamin D | 13 |
| Vitamin E | 13 |
| Iodine | 12 |
| Selenium | 12 |
| Niacin | 11 |
| Vitamin B12 | 10 |
| Vitamin B6 | 9 |
| Riboflavin | 7 |
15 study groups