Vitamin B9 and Increased Total Folate Level

Doses used in studies

Safety in these studies

Overall tolerabilityIncreased risk
almost all women taking a folic acid-based supplement exceed the upper tolerable limit of folic acid intake
from: Women Taking a Folic Acid Supplement in Countries with Mandatory Food Fortification Progra
Overall tolerabilityReported
The upper tolerable limit of 1000 mcg was determined to avoid masking a vitamin B12 deficiency and not based on folic acid bioavailability and metabolism
from: Women Taking a Folic Acid Supplement in Countries with Mandatory Food Fortification Progra

1 of 1 paper

Women Taking a Folic Acid Supplement in Countries with Mandatory Food Fortification Programs May Be Exceeding the Upper Tolerable Limit of Folic Acid: A Systematic Review.