Introducing Mixi Mandelic Serums, Our L-Mandelic Acid is a superhero for your skin. this multifunction Alpha Hydroxy Acid does wonders for reducing redness and inflammation from acne and rosacea. Not only that, but it also works like magic on fine lines, melasma, and sun-related pigmentation. L-Mandelic Acid is also an effective 5-Alpha Reductase inhibitor. This enzyme is responsible for converting testosterone to DHT, which can make your sebaceous glands go into overdrive and increase acne. For external use only.