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L-Ascorbic Acid (Vitamin C) is a core water-soluble antioxidant vitamin that meets domestic pharmacopoeia, food and pharmaceutical-grade standards. It is an essential nutrient for human body, featuring strong free radical scavenging capacity and antioxidant activity. It can promote collagen synthesis, enhance immune function, resist oxidation and aging, and assist in maintaining normal skin and mucosal health. Widely used in compound vitamin preparations, food anti-oxidation preservation, nutritional health product fortification and cosmetic functional raw materials, it is one of the most widely applied basic vitamin raw materials in the food, pharmaceutical and daily chemical industries.