L-Ascorbic acid is widely used in the food industry as an antioxidant to preserve the freshness, flavor, and color of various products. It helps prevent oxidation in fruits, vegetables, and beverages, extending their shelf life. In the cosmetic and skincare industry, it is a key ingredient in anti-aging products due to its ability to promote collagen synthesis and protect the skin from oxidative stress caused by UV exposure. It is also used in pharmaceuticals as a dietary supplement to prevent or treat vitamin C deficiency, supporting immune function and overall health. Additionally, it plays a role in industrial applications, such as in water treatment, where it acts as a reducing agent to remove chlorine and other contaminants.