L-malic acid contains natural moisturizing ingredients that can remove wrinkles on the skin surface, making the skin tender, fair, smooth and elastic. Therefore, it is highly favored in cosmetic formulas. L-malic acid can be used to formulate a variety of fragrances and flavors, and is applied in many daily chemical products, such as toothpaste and shampoo. Abroad, it is used to replace citric acid as a new type of detergent additive for the synthesis of high-end special detergents. L-malic acid can be used in drug preparations, tablets, syrups, and can also be mixed into amino acid solutions, significantly enhancing the absorption rate of amino acids. L-malic acid can be used to treat various diseases such as liver diseases, anemia, low immunity, uremia, hypertension and liver failure, and can also reduce the toxic effects of anti-cancer drugs on normal cells. It can also be used in the preparation and synthesis of insect repellents, anti-tartar agents, etc. In addition, L-malic acid can also be used as an industrial cleaning agent, resin curing agent, plasticizer for synthetic materials, feed additive, etc.