Dr Koo Level 1 Retinol | Sensitive Skin Renewal Shop-All to add a natural glisten

to add a natural glisten and protective finish

Citric Acid

Almond glycerides calm sensitivity and reduce redness

giving a radiant finish to natural skin or over makeup

RETINOL Level 3: Phytosterols stimulate collagen and elastin

Dr Koo Level 1 Retinol | Sensitive Skin Renewal Shop-All to add a natural glistenFormulated For Prevention, sensitive skin, retinol naive skin, or post procedure maintenance. This is the entry concentration where your skin learns to respond to retinoid signaling without overwhelming the barrier. The Mechanism At 1,000 IUs, Level 1 initiates retinoic acid receptor (RAR RXR) binding at threshold concentration. Retinol is converted intracellularly through a two step enzymatic process retinol to retinal, then retinal to retinoic acid