What vitamin is essential for the formation of connective tissue?

Vitamin C is crucial for the formation of connective tissue due to its role in collagen synthesis. Collagen is a fundamental protein that provides structural support to various tissues, including skin, bones, and cartilage. Vitamin C acts as a cofactor in the enzymatic reactions that convert proline and lysine into hydroxyproline and hydroxylysine, which are necessary for stable collagen fibers. Without adequate Vitamin C, the body cannot produce enough collagen, leading to weakened connective tissues and an increased risk of conditions like scurvy.

Other vitamins mentioned, while important for different bodily functions, do not play a direct role in connective tissue formation. Vitamin A is primarily involved in vision and immune function, Vitamin D is essential for calcium absorption and bone health, and Vitamin E acts as an antioxidant, protecting cells from oxidative damage. However, none of these vitamins are specifically necessary for the synthesis of collagen, which makes Vitamin C the correct answer in the context of connective tissue formation.