Your skin contains millions of specialized cells that work together to form a barrier between the environment and the rest of your body, helping to prevent infection and disease. These cells form layers of skin tissue, as well as nerves, sweat and oil glands and hair follicles that contribute to the function of your skin. The functioning and maintenance of these tissues relies on nutrients obtained from your diet, and a number of vitamins play a role in keeping your skin healthy. As a result, deficiencies in certain vitamins can lead to uncomfortable and dry skin.
Vitamin E
Deficiencies in vitamin E may lead to dry skin. Vitamin E is made up of two families of chemicals, each containing four related molecules. Together, these chemicals help nourish and protect skin tissue, and deficiencies in the vitamin may diminish the feel and appearance of your skin. If you suffer from dry skin, the University of Maryland Medical Center recommends applying topical vitamin E cream to help replenish the levels of vitamin E within your skin, and smooth skin wrinkles and roughness.
Biotin
Deficiencies in biotin, or vitamin H, may also cause dry skin, according to the University of Maryland Medical Center. Biotin belongs to the family of B-class vitamins, which work together to help preserve the health of your hair, skin and nails, as well as your nervous system. While rare, deficiencies in biotin can lead to the development of dry, scaly skin, as well as brittle hair and nails, and cracking of the skin around your mouth. Consuming biotin-rich foods, such as whole eggs or nuts, can help prevent biotin deficiency.
Vitamin A
Vitamin A, or retinol, deficiency may also lead to dry skin. Vitamin A is capable of signaling to cells within your skin, and this vitamin A signaling plays a role in maintaining the integrity of your skin, as well as mucosal membranes, according to the Linus Pauling Institute at Oregon State University. As a result, deficiencies in vitamin A can have a detrimental effect on your skin, and may lead to dryness or cracking. However, excess supplementation of vitamin A may also cause dry, scaly skin, so only consume vitamin A supplements under the supervision of a physician, or consume vitamin A through dietary sources, such as carrots or sweet potatoes.
Vitamin C
Ascorbic acid, or vitamin C, also proves important for preventing dry skin. The University of Maryland Medical Center explains that vitamin C in your body aids in healthy skin growth -- it promotes the formation of collagen, a protein that keeps your skin strong and smooth. As a result, vitamin C deficiencies diminish the appearance of your skin, leading to dryness and scaling. Consume a diet rich in fruits and vegetables, including strawberries, citrus fruits and red peppers, to help prevent vitamin C deficiency and dry skin.
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