Which of the following vitamins is specifically known as an antioxidant?

Vitamin C is specifically known as an antioxidant due to its ability to neutralize free radicals and protect cells from oxidative stress. This vitamin plays a critical role in various physiological functions, including collagen synthesis, immune function, and enhancing the absorption of non-heme iron from plant-based foods. As a potent antioxidant, Vitamin C helps to prevent damage to DNA, lipids, and proteins, thereby contributing to overall health and potentially reducing the risk of chronic diseases associated with oxidative damage.

In contrast, while Vitamin A has some antioxidant properties, its primary functions are related to vision, immune function, and skin health. Vitamin D is essential for bone health and calcium regulation, rather than being recognized for its antioxidant effects. Vitamin B12 is crucial for nerve function and the production of DNA and red blood cells, but it does not have significant antioxidant properties. Thus, Vitamin C stands out as the vitamin most commonly associated with antioxidant activity.