There are three isomers of malic acid: L- malic acid, D- malic acid and DL-malic acid. The naturally occurring malic acid is L-shaped and is found in almost all fruits, with the most occurring in the kernel. Malic acid for colorless needle crystal, or white crystal powder, odorless, with a stimulating refreshing sour taste.
L - malic acid as the important component of natural fruit juices, acidity compared with citric acid (sour taste better than citric acid 20%), but the taste is soft (higher buffer index), special fragrance, don't damage the mouth and teeth, metabolic amino acid absorption and no accumulation of fat, citric acid, is the new generation of food by biologists and nutrition known as "the most ideal food acidity agent." , has been replacing citric acid in foods for the elderly and children since 2013.
L-malic acid is an essential organic acid for human body and an ideal food additive with low calorie. When 50% L-malic acid is combined with 20% citric acid, it produces a strong natural fruit flavor.
Beverages (various refreshing drinks): soft drinks prepared by L-malic acid quench thirst and refreshing, with apple sour taste, close to natural juice. Some large domestic food companies, such as Wahaha Group and Jianlibao Group, began to use L-malic acid in their drinks.
L-malic acid is a cyclic intermediate of biological tricarboxylic acid, which tastes close to natural juice and has a natural fragrance. Compared with citric acid, L-malic acid produces less heat and tastes better, so it is widely used in wine, beverage, jam, chewing gum and other foods, and has a tendency to gradually replace citric acid. It is one of the organic acids with the largest consumption and better development prospect in the world food industry.
In fine chemical industry:
L-malic acid is a natural skin moisturizer that can easily dissolve the "glue" between dry, scaly dead cells, thus removing skin wrinkles and making skin tender, white, smooth and elastic. Therefore, it is favored in cosmetic formulas. L-malic acid can be prepared with a variety of flavors, spices, used in a variety of daily chemical products, such as toothpaste, shampoo, etc. Compared with citric acid, L-malic acid has a soft and unique sour taste. Therefore, it is used to replace citric acid as a new detergent agent in foreign countries.