MedlinePlus Medical Encyclopedia: Brittle nails

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Brittle nails

Like the skin, the fingernails are a reflection of a person's state of health. Low levels of zinc and iron as well as thyroid problems can cause brittle nails. However, brittle nails are often a normal result of aging.

Update Date: 3/30/2007

Updated by: A.D.A.M. Medical Illustration Team

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