B-6 vitamers and 4-pyridoxic acid in the plasma, erythrocytes, and urine of postmenopausal women.

Background: Although many studies have reported reduced vitamin B-6 status with aging, little information is available about the specific effects of menopause.

Objective: We aimed to examine vitamin B-6 metabolism in premenopausal and early postmenopausal women.

Design: We examined dietary intake and vitamin B-6 metabolites in the plasma, erythrocytes, and urine of 30 premenopausal women (x +/- SD age: 41.