Origin
Potassium malate is chemically synthesized from malic acid. Malic acid, known under the designation E 296, is also used as a food additive - in the case of E 296 as a preservative. Since malic acid can be of natural origin or synthetically produced, potassium malate accordingly consists of either natural or synthetic forms. Furthermore, E 351 can still be produced by a second method where genetically modified fungi or bacteria produce the substance.
Usage
For the food additive E 351 there are no special maximum quantity restrictions and potassium malate is allowed in all foods without restriction. Mainly, E 351 is found as an acid regulator in the following foods: fruit and vegetable preserves, jellies, jams, confections, fruit juices, ready soups, and sauces.
Risks
Potassium malate is a food additive that is completely harmless. So far, no negative effects on the human organism have been detected. It also seems to make no difference whether it is of synthetic or natural origin. Therefore, one can confidently reach for foods that are labeled with the E-number E 351 on their packaging.