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.

LEVEL 1 – pH OPTIMUM RETINOL SUSTAINING – 1000 IUs

LEVEL 1 – pH OPTIMUM RETINOL SUSTAINING – 1000 IUs

For Retinol Novices or Sensitive Skin

$120
LEVEL 2 – pH OPTIMUM RETINOL ACTIVATE - 2000 IUsLEVEL 2 – pH OPTIMUM RETINOL ACTIVATE - 2000 IUs

LEVEL 2 – pH OPTIMUM RETINOL ACTIVATE - 2000 IUs

For mild to moderate wrinkles, uneven texture, and fine pores

$165
LEVEL 3 – pH OPTIMUM RETINOL REPAIRING - 5000 IUsLEVEL 3 – pH OPTIMUM RETINOL REPAIRING - 5000 IUs

LEVEL 3 – pH OPTIMUM RETINOL REPAIRING - 5000 IUs

For moderate to advanced wrinkles, irregular texture, and noticeable pores

$185
LEVEL 4 – pH OPTIMUM RETINOL RESTORING - 8000 IUsLEVEL 4 – pH OPTIMUM RETINOL RESTORING - 8000 IUs

LEVEL 4 – pH OPTIMUM RETINOL RESTORING - 8000 IUs

For deep wrinkles, rough texture, and significant pores

$215