Exploring The Benefits Of Malic Acid Malic acid is a natural substance found in fruit and vegetables - one of the richest sources being apples. It is also naturally present in your body's cells and large amounts of it are formed and then eventually broken down again on a daily basis. It possesses many health-related benefits such as boosting immunity, maintaining oral health, reducing the risk of poisoning from a build-up of toxic metals and promoting smoother and firmer skin. in enzymeswith acidenzymesfoundfruitmalicnaturalsubstancevegetables