Which of these vitamins is primarily involved in maintaining skin and lining cells in the body?

Vitamin A is primarily involved in maintaining the health of skin and lining cells throughout the body. This vitamin plays a crucial role in the growth and differentiation of epithelial tissues, which include the skin and mucous membranes. It helps maintain the integrity of these tissues, ensuring they function properly as barriers to protect the body from infections and environmental damage.

Additionally, Vitamin A is essential for the synthesis of proteins that are necessary for cell growth and repair, contributing to cellular turnover and the overall health of the skin. Deficiencies in Vitamin A can lead to a range of dermatological issues, including dry skin, an increased risk of infections, and impaired healing processes.

While other vitamins, such as Vitamin C, have roles in skin health, particularly in collagen formation and antioxidant protection, Vitamin A is uniquely significant for the maintenance of epithelial cells. This makes it the most relevant choice in relation to the specific function of maintaining skin and lining cells.