Brittle nails

Brittle nails are a common symptom of nutritional deficiencies, fungal infections, or aging. They appear dry, thin, and break easily. Over time, they may become yellow or discolored, and the edges may become ragged or split. The most common type of brittle nails is caused by a lack of biotin, although other deficiencies such as zinc, iron, and calcium can also contribute. Fungal infections can also cause brittle nails, and usually cause the nails to become discolored, thickened, and crumbly. Aging can also lead to brittle nails, as the nail plate becomes thinner and more fragile.