Folic Acid, Vitamin B12, Vitamin C, Vitamin D and Vitamin A: study protocols
11 study groups took Folic Acid together with Vitamin B12, Vitamin C, Vitamin D 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 B12
11 study groups in 9 studies say how much Vitamin B12 participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 2.5 mcg to 5 mcg, 82% of 11 study groups.
| Daily dose | Study groups |
|---|---|
| 1 mcg or less | 1 |
| 1 mcg to 2.5 mcg | 1 |
| 2.5 mcg to 5 mcg | 9 |
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, 80% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 25 mg or less | 1 |
| 25 mg to 50 mg | 1 |
| 50 mg to 100 mg | 8 |
Dose per serving from research: Vitamin D
6 study groups in 4 studies say how much Vitamin D participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 100 IU to 250 IU, 67% of 6 study groups.
| Daily dose | Study groups |
|---|---|
| 100 IU or less | 1 |
| 100 IU to 250 IU | 4 |
| 250 IU to 500 IU | 1 |
Dose per serving from research: Vitamin A
10 study groups in 8 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, 90% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg or less | 1 |
| 250 mcg to 500 mcg | 0 |
| 500 mcg to 1 mg | 9 |
Commonly used together
11 of 11 study groups took Folic Acid, Vitamin B12, Vitamin C, Vitamin D and Vitamin A 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 | 11 |
| Copper | 10 |
| Iron | 10 |
| Vitamin B6 | 10 |
| Zinc | 10 |
| Iodine | 9 |
| Niacin | 9 |
| Selenium | 9 |
| Riboflavin | 6 |
| Thiamine | 4 |
11 study groups