Iron, Vitamin D, Vitamin B12 and Folic Acid: study protocols
10 study groups took Iron together with Vitamin D, Vitamin B12 and Folic Acid. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Iron
10 study groups in 8 studies say how much Iron participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 25 mg to 50 mg, 80% of 10 study groups.
| Daily dose | Study groups |
|---|---|
| 10 mg or less | 1 |
| 10 mg to 25 mg | 1 |
| 25 mg to 50 mg | 8 |
Dose per serving from research: Vitamin D
5 study groups in 3 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, 80% of 5 study groups.
| Daily dose | Study groups |
|---|---|
| 100 IU or less | 1 |
| 100 IU to 250 IU | 4 |
Dose per serving from research: Vitamin B12
9 study groups in 7 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, 78% of 9 study groups.
| Daily dose | Study groups |
|---|---|
| 1 mcg or less | 1 |
| 1 mcg to 2.5 mcg | 0 |
| 2.5 mcg to 5 mcg | 7 |
| over 5 mcg | 1 |
Dose per serving from research: Folic Acid
9 study groups in 7 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, 78% of 9 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg to 500 mcg | 7 |
| 500 mcg to 1 mg | 2 |
Commonly used together
10 of 10 study groups took Iron, Vitamin D, Vitamin B12 and Folic Acid with something else. Shown: what 3 or more different studies gave.
What was given together, not what works together.
| Taken with | Study groups |
|---|---|
| Iodine | 9 |
| Vitamin A | 9 |
| Vitamin B6 | 9 |
| Vitamin C | 9 |
| Vitamin E | 9 |
| Zinc | 9 |
| Copper | 8 |
| Selenium | 8 |
| Niacin | 7 |
| Riboflavin | 5 |
10 study groups