1.Cosmetics1) L-Vitamin C inhibits tyrosinase and reduces melanin, and diminishes the formed spots to inhibit melanin formation.2) Promote collagen synthesis to reduce fine lines.3) L-Vitamin C can effectively neutralize free radicals, improve skin texture, restore damaged skin, and make skin firm and elastic.4) Promote skin metabolism and accelerate skin rejuvenation.2. MedicalVitamin C is mainly used for the prevention or treatment of scurvy in medicine, as well as for diseases such as dental caries, gingival abscess, anemia, and growth and development caused by anti-hyperacid deficiency.3. Food additivesVitamin C can be used for sandwich hard candy, and the amount used is 2000-6000mg/kg;The amount of use in high-iron cereals and their products is 800-1000 mg/kg;The amount used in infant food is 300-500 mg/kg;The amount used in canned fruit is 200-400 mg/kg;The amount used in drinks and milk drinks is 120-240 mg/kg;The amount used in the puree is 50 to 100 mg/kg.