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Do GNC Hair, Skin& Nails vitamins work?

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Do GNC Hair, Skin& Nails vitamins work?

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On One Hand: Adequate Vitamins Are NecessaryGNC’s Hair, Skin and Nails Formula contains 100 percent of the daily value (DV) of a number of essential vitamins, including A, C and E. It also contains 1000 percent of the DV of biotin, which is often found in vitamins for hair and nails. Dr. George Obikoya says that adequate intake of vitamins is necessary for healthy hair, skin, and nails. A small study published in 1993 by the National Institutes of Health found that some subjects increased their nail thickness and strength with biotin supplementation.On the Other: Additional Vitamins Not NecessaryDietician Joanne Larson says that poor nail growth and strength are often more related to environmental factors, such as frequent washing and the overuse of alcohol-based hand sanitizers, than nutritional deficiencies. The Linus Pauling Institute says that, while low biotin intake can cause hair loss, biotin deficiency is rare, and supplementation does not appear to affect hair growth.Bottom Li

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