"Our skin cells become lazy with age, so exfoliating acids help promote cellular turnover and remove dead skin cells that build up on the outer skin layer," explains Dr. Shirazi. Like retinol, glycolic acid is an active ingredient that can feel harsh on sensitive skin types, so opt for lower concentrations of the ingredient when introducing it to your skin or try gentler AHAs, like lactic acid. Beyond its antioxidant properties, she also notes that CoQ10 addresses discoloration like age spots and minimizes the look of crepey skin by supporting skin barrier function, cellular turnover, and production of collagen and elastin, leaving skin firm and supple.