and you should too! Sunday Riley’s Good Genes All in One Lactic Acid Treatment. This serum means business. You feel it working right when you put it on. It is strong, so I would not recommend to those with sensitive skin. The Purified Lactic Acid is hydrating and exfoliating. Your skin is left clarified, refreshed, and smoother. It helps fight build up of dead skin cells and excess sebum. There is also licorice for brightening, lemongrass to tone, and arnica to soothe. This is a cult favorite and I can see why. So get Good Genes, even if you weren’t born with them…