The most important reason for using fermented ingredients in skin care is to increase the potency of natural extracts. It also causes the breakdown of larger organic plant structures and complex molecules into smaller - and potentially more bioactive - molecules. Since most fermented ingredients are acidic, they help to naturally exfoliate dead cells, allowing the product to penetrate deeper. Fermented ingredients are often loaded with antioxidants and anti-inflammatory ingredients and can provide a calming and brightening effect to the skin. Many fermented ingredients are known for promoting healthy bacteria growth on the skin, while simultaneously eliminating bad bacteria.