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Can drinking alcohol cause vitamin deficiencies?

Dariush Mozaffarian, MD
Internal Medicine
Heavy drinking is known to cause folic acid deficiency. And even moderate drinking -- about one drink per day for women and two for men -- may pose a problem. Women in the Nurses' Health Study who drank moderate amounts of alcohol and took in little folic acid had a higher risk for breast cancer than their counterparts who took multivitamins containing folic acid. This combination -- drinking alcohol and having low levels of folic acid -- has been linked to colon cancer, too. Experts advise even moderate consumers of alcohol to step up their folic acid intake. Heavy drinking can also contribute to deficiencies of other micronutrients, including vitamin A, thiamin, vitamin D, magnesium, calcium, and potassium. It may increase the need for niacin, vitamin C, and sometimes zinc. Tissue studies on people who are dependent on alcohol have noted lower concentrations of the antioxidants beta carotene, vitamins C and E, and selenium.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.