Vitamin C, or ascorbic acid, is a water-soluble nutrient crucial for immune function and collagen synthesis. Acting as an antioxidant, it protects cells from oxidative stress and aids in the absorption of non-heme iron. Abundant in fruits and vegetables like citrus fruits and bell peppers, it supports healthy skin, wound healing, and resistance to infections. Vitamin C’s diverse benefits highlight its importance in maintaining overall health and well-being.