What vitamin deficiency causes dry skin?

Dry skin is usually associated with vitamin deficiencies, primarily involving the following vitamins: 1. Vitamin A: Vitamin A plays a crucial role in maintaining normal keratinization metabolism of the skin. A deficiency in vitamin A can reduce skin moisture, leading to dryness. 2. B-complex vitamins: Various B vitamins are essential for healthy skin. Deficiencies in B vitamins may impair skin nutrition, resulting in roughness, itching, and other symptoms. 3. Vitamin C: Vitamin C significantly influences skin elasticity and nutritional status. A lack of vitamin C can reduce skin elasticity and lead to dryness, flaking, and similar conditions.