Folic Acid, Vitamin C and Vitamin A: study protocols
20 study groups took Folic Acid together with Vitamin C and Vitamin A. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Folic Acid
20 study groups in 15 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, 55% of 20 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg or less | 1 |
| 100 mcg to 250 mcg | 3 |
| 250 mcg to 500 mcg | 11 |
| 500 mcg to 1 mg | 3 |
| 1 mg to 2.5 mg | 0 |
| 2.5 mg to 5 mg | 0 |
| 5 mg to 10 mg | 0 |
| 10 mg to 25 mg | 0 |
| 25 mg to 50 mg | 0 |
| 50 mg to 100 mg | 2 |
Dose per serving from research: Vitamin C
19 study groups in 14 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, 53% of 19 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg to 10 mg | 3 |
| 10 mg to 25 mg | 0 |
| 25 mg to 50 mg | 3 |
| 50 mg to 100 mg | 10 |
| 100 mg to 250 mg | 2 |
| over 250 mg | 1 |
Dose per serving from research: Vitamin A
18 study groups in 13 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, 72% of 18 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg or less | 1 |
| 250 mcg to 500 mcg | 2 |
| 500 mcg to 1 mg | 13 |
| 1 mg to 2.5 mg | 2 |
Commonly used together
20 of 20 study groups took Folic Acid, Vitamin C and Vitamin A with something else. Shown: what 3 or more different studies gave. The 10 most common of 13.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Iron | 18 |
| Vitamin E | 15 |
| Zinc | 15 |
| Vitamin D | 14 |
| Copper | 13 |
| Iodine | 12 |
| Niacin | 12 |
| Selenium | 12 |
| Vitamin B12 | 12 |
| Vitamin B6 | 11 |
20 study groups