L-ascorbic acid, commonly known as vitamin C, is a water-soluble vitamin essential for various bodily functions. It plays a crucial role in the synthesis of collagen, which is vital for skin, cartilage, and bone health. Additionally, it acts as an antioxidant, helping to protect cells from damage caused by free radicals. Humans cannot produce L-ascorbic acid naturally, so it must be obtained through diet or supplements. Rich sources include fruits like oranges, kiwis, and strawberries, as well as vegetables such as bell peppers and broccoli. Adequate intake is important for overall health and immune function.