Obagi Medical Retinol 1.0 (1 oz.) Brand New, never used! Details: Obagi's Retinol 1.0 fights the signs of premature aging caused by environmental aggressors to promote a more radiant and youthful-looking complexion. Powered by 1% retinol, this anti-wrinkle treatment boosts cell turnover to minimize fine lines and wrinkles while diminishing hyperpigmentation. Hydrating jojoba oil and shea butter promote firmness and elasticity, as vitamins C and E work synergistically to neutralize free radicals.