Which vitamin is known for its role in immune function?

Vitamin C is widely recognized for its crucial role in supporting immune function. It acts as an antioxidant, helping to protect immune cells from damage caused by free radicals. Additionally, vitamin C is involved in the production and proliferation of white blood cells, which are essential for fighting infections. It also enhances the absorption of iron from plant-based foods, promoting overall immune health. Furthermore, vitamin C is vital for the synthesis of collagen, which provides structural support to tissues and aids in wound healing, thereby contributing to a robust immune response.

While other vitamins also play roles in immune function, none are as directly associated with the immune system's response to pathogens as vitamin C. For example, vitamin A is important for maintaining the integrity of skin and mucosal cells, which serve as barriers to infection, while vitamin D helps modulate the immune response and maintain bone health. Vitamin B12 is essential for red blood cell production and neurological function but does not have a specific and well-established role in immune system function comparable to that of vitamin C.