Which vitamin deficiency can cause hair loss and skin changes?

Vitamin B deficiency is indeed associated with hair loss and various skin changes. The B vitamins, particularly biotin (B7) and niacin (B3), play crucial roles in maintaining healthy skin and hair. Biotin is often referred to as the "hair vitamin" because it helps strengthen hair and promotes its growth. A deficiency in biotin can lead to hair thinning and loss. Similarly, niacin contributes to blood circulation and skin health, and its absence may result in dry skin and other dermal issues.

Other B vitamins, such as B6 and B12, are important for overall cellular function and health, and their deficiencies can also manifest in skin problems. Therefore, ensuring adequate intake of these vitamins is vital for maintaining the health and appearance of both hair and skin.