The tours de force of any beauty routine, serums and treatments make a little go a long way. This curated selection of potent formulas includes the best in brightening vitamin C serums, daily moisturizing boosters, skin-firming retinol concentrates, and pore-detoxifying masks. These premium products boost active botanical ingredients with dermatologist-approved acids, vitamins, and peptides—forming highly concentrated treatments that can tackle everything from fine lines to acne scars. Small but mighty, serums and treatments have proven themselves as self-care essentials.