You must read and accept the disclaimer to use this site. Updated for monthly, 2011

You must read and accept the disclaimer to use this site.

Vitamin B7, biotin

Daily Value: 300 mcg

Hazardous level: safe at more than 10xRDA

Average intake in US diet: 28-42 mcg

Function: part of enzymes that transport carboxyl units and fix carbon dioxide, essential for sugar and fatty acid synthesis; fat, protein, and carbohydrate metabolism

DOSAGE RATIONALE: Wide margin of safety. Because of possible decreased absorption by elderly, use 150% of RDA adjusted for weight and diet.

KEY NOTES AND REFERENCES:

Benton D; Haller J; Fordy J, "The vitamin status of young British adults", Int J Vitam Nutr Res 67(1):34-40 (1997)

"thiamin, riboflavin, pyridoxine, ascorbic acid, retinol, alpha-tocopherol, folic acid, cyanocobalanin, carotene and biotin status were assessed in a sample of 243 young British adults... The status of ascorbic acid, cyanocobalamin, alpha-tocopherol, folic acid and in males retinol, was adequate in the majority of cases. In the cases of riboflavin and pyridoxine the status of a substantial minority was either borderline or deficient. The thiamin and biotin status of a minority of both sexes, and retinol in the females, was marginal"