Which vitamin is not considered a B vitamin?

Vitamin C is not considered a B vitamin because it is classified as a water-soluble vitamin that falls outside the B-complex group. The B vitamins, which include thiamine, niacin, and folate, are primarily involved in energy production, metabolism, and red blood cell formation. They play crucial roles in various biochemical processes that are essential for maintaining overall health.

In contrast, vitamin C, also known as ascorbic acid, serves different functions in the body, such as being a powerful antioxidant, aiding in collagen synthesis, enhancing the immune response, and facilitating the absorption of iron from plant-based foods. While it is essential for health, its physiological roles and chemical structure distinguish it from the B vitamins, which have a more targeted function regarding energy metabolism and neurological health.