Folic Acid, Vitamin B6, Vitamin C and Vitamin A: study protocols
11 study groups took Folic Acid together with Vitamin B6, Vitamin C and Vitamin A. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Folic Acid
11 study groups in 9 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, 73% of 11 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg or less | 1 |
| 100 mcg to 250 mcg | 0 |
| 250 mcg to 500 mcg | 8 |
| 500 mcg to 1 mg | 2 |
Dose per serving from research: Vitamin B6
11 study groups in 9 studies say how much Vitamin B6 participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 1 mg to 2.5 mg, 82% of 11 study groups.
| Daily dose | Study groups |
|---|---|
| 500 mcg or less | 1 |
| 500 mcg to 1 mg | 0 |
| 1 mg to 2.5 mg | 9 |
| 2.5 mg to 5 mg | 0 |
| 5 mg to 10 mg | 0 |
| 10 mg to 25 mg | 1 |
Dose per serving from research: Vitamin C
10 study groups in 8 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, 70% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 25 mg or less | 1 |
| 25 mg to 50 mg | 1 |
| 50 mg to 100 mg | 7 |
| 100 mg to 250 mg | 0 |
| 250 mg to 500 mg | 1 |
Dose per serving from research: Vitamin A
9 study groups in 7 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, 89% of 9 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg or less | 1 |
| 250 mcg to 500 mcg | 0 |
| 500 mcg to 1 mg | 8 |
Commonly used together
11 of 11 study groups took Folic Acid, Vitamin B6, Vitamin C and Vitamin A with something else. Shown: what 3 or more different studies gave. The 10 most common of 11.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Vitamin B12 | 11 |
| Vitamin E | 11 |
| Vitamin D | 10 |
| Copper | 9 |
| Iron | 9 |
| Niacin | 9 |
| Zinc | 9 |
| Iodine | 8 |
| Selenium | 8 |
| Riboflavin | 7 |
11 study groups