Folic Acid, Vitamin A, Iodine, Zinc and Selenium: study protocols
13 study groups took Folic Acid together with Vitamin A, Iodine, Zinc and Selenium. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Folic Acid
13 study groups in 10 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, 69% of 13 study groups.
| Daily dose | Study groups |
|---|---|
| 100 mcg or less | 1 |
| 100 mcg to 250 mcg | 1 |
| 250 mcg to 500 mcg | 9 |
| 500 mcg to 1 mg | 2 |
Dose per serving from research: Vitamin A
12 study groups in 9 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 12 study groups.
| Daily dose | Study groups |
|---|---|
| 250 mcg or less | 1 |
| 250 mcg to 500 mcg | 1 |
| 500 mcg to 1 mg | 8 |
| 1 mg to 2.5 mg | 2 |
Dose per serving from research: Iodine
13 study groups in 10 studies say how much Iodine participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 100 mcg to 250 mcg, 69% of 13 study groups.
| Daily dose | Study groups |
|---|---|
| 50 mcg or less | 1 |
| 50 mcg to 100 mcg | 1 |
| 100 mcg to 250 mcg | 9 |
| 250 mcg to 500 mcg | 2 |
Dose per serving from research: Zinc
13 study groups in 10 studies say how much Zinc participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 10 mg to 25 mg, 62% of 13 study groups.
| Daily dose | Study groups |
|---|---|
| 5 mg or less | 1 |
| 5 mg to 10 mg | 2 |
| 10 mg to 25 mg | 8 |
| 25 mg to 50 mg | 2 |
Dose per serving from research: Selenium
13 study groups in 10 studies say how much Selenium participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 50 mcg to 100 mcg, 69% of 13 study groups.
| Daily dose | Study groups |
|---|---|
| 10 mcg or less | 1 |
| 10 mcg to 25 mcg | 1 |
| 25 mcg to 50 mcg | 0 |
| 50 mcg to 100 mcg | 9 |
| 100 mcg to 250 mcg | 2 |
Commonly used together
13 of 13 study groups took Folic Acid, Vitamin A, Iodine, Zinc and Selenium 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 |
|---|---|
| Copper | 13 |
| Vitamin E | 13 |
| Iron | 12 |
| Vitamin C | 12 |
| Vitamin D | 12 |
| Niacin | 11 |
| Vitamin B12 | 10 |
| Vitamin B6 | 9 |
| Riboflavin | 7 |
| vitamin B-6 | 4 |
13 study groups