Ascorbic acid E300 Ascorbic acid E300, vitamin C Ascorbic acid E300 or vitamin C is one of the main substances in the human diet necessary for the normal functioning of connective and bone tissue. Ascorbic acid is used in the food industry for the production of confectionery, jelly, marmalade, jams, canned fruits, vegetables, mushrooms, pasta, alcoholic drinks, liqueurs, wines, beer, soft drinks, juices, nectars, lemonade, dairy products, condensed milk, meat products, sausages, sausages, semi-finished products, fish products, bakery products, as well as the feed industry, the cosmetic industry, the pharmaceutical industry, the chemical industry. Used as an acidity regulator, antioxidant, preservative, baking powder, color stabilizer.