Vitamin B12, Vitamin A and Folic Acid: study protocols
10 study groups took Vitamin B12 together with Vitamin A and Folic Acid. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Vitamin B12
10 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, 40% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 1 mcg or less | 1 |
| 1 mcg to 2.5 mcg | 2 |
| 2.5 mcg to 5 mcg | 4 |
| 5 mcg to 10 mcg | 0 |
| 10 mcg to 25 mcg | 0 |
| 25 mcg to 50 mcg | 1 |
| 50 mcg to 100 mcg | 0 |
| 100 mcg to 250 mcg | 0 |
| 250 mcg to 500 mcg | 0 |
| 500 mcg to 1 mg | 0 |
| 1 mg to 2.5 mg | 0 |
| 2.5 mg to 5 mg | 0 |
| 5 mg to 10 mg | 2 |
Dose per serving from research: Vitamin A
6 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: 500 mcg to 1 mg, 67% of 6 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg to 500 mcg | 2 |
| 500 mcg to 1 mg | 4 |
Dose per serving from research: Folic Acid
10 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, 40% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 50 mcg or less | 1 |
| 50 mcg to 100 mcg | 0 |
| 100 mcg to 250 mcg | 2 |
| 250 mcg to 500 mcg | 4 |
| 500 mcg to 1 mg | 3 |
Commonly used together
10 of 10 study groups took Vitamin B12, Vitamin A and Folic Acid 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 | 8 |
| Vitamin E | 7 |
| Zinc | 7 |
| Copper | 6 |
| Vitamin B6 | 6 |
| Vitamin C | 6 |
| Iodine | 5 |
| Selenium | 5 |
| Vitamin D | 5 |
| Niacin | 4 |
10 study groups