Different chemicals: They are all beneficial but are different. They stimulate skin to rapidly exfoliate, make new smoother skin and stimulate collagen&elastin. Tretinoin and Retinol come from Vit.A . Retin A:brand of Tretinoin, best effect, mostirritation,Script only. Retinol :midpotency, midirritant, OTC Glycolic acid is from Sugar. Lesser exfoliation and improvement of collagen&elastin, OTC, better for dry skin
Answered 10/12/2018
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