Ascorbic acid (vitamin C) ek water-soluble antioxidant hai jo skincare mein free radicals ko neutralize karta hai, collagen synthesis ko support karta hai aur skin tone ko bright karta hai. 0.01% concentration par yeh bahut kam hai, typical 5-20% range se kaafi neeche hai, toh skin par noticeable effect dekhne ke liye thoda weak hai.