Malic acid in skin care products is celebrated for its ability to brighten the skin and smooth its texture. That's why it's a common ingredient in anti-aging creams. According to a brain-skin connection study , higher stress can worsen skin conditions like eczema, acne, and premature aging.
People take malic acid by mouth for tiredness and fibromyalgia. In foods, malic acid is used as a flavoring agent to give food a tart taste. In manufacturing, malic acid is used to adjust the acidity of cosmetics