What vitamin is retinol derived from?

Retinol is a form of Vitamin A, which is essential for various bodily functions, including vision, immune system performance, and skin health. It is a fat-soluble vitamin that plays a crucial role in maintaining healthy skin and mucous membranes, and it's also important for proper vision, particularly in low light conditions. Retinol is often used in skincare products due to its ability to promote cell turnover and improve skin texture.

While vitamins E, C, and K serve their own important roles in health, they do not relate to retinol. Vitamin E is primarily known for its antioxidant properties, Vitamin C is crucial for the synthesis of collagen and also serves as an antioxidant, and Vitamin K is important for blood clotting and bone health. Thus, out of these choices, Vitamin A is the one from which retinol is directly derived.