Retinol
Retinol is the #1 skin-transforming ingredient of our time because it promotes the production of collagen and elastin — the building blocks for firm, plump, youthful-looking skin. Dr. Koo created 4 levels of retinol to be used at different ages and as your skin changes. Discover your level and experience the dramatic results.
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LEVEL 1 – pH OPTIMUM RETINOL SUSTAINING – 1000 IUs
35 reviews
For Retinol Novices or Sensitive Skin
Sale price$120.00
LEVEL 2 – pH OPTIMUM RETINOL ACTIVATE - 2000 IUs
8 reviews
For mild to moderate wrinkles, uneven texture, and fine pores
Sale price$165.00