Dr Koo Level 1 Retinol | Sensitive Skin Renewal Shop-All RETINOL Level 3: Phytosterols stimulate

RETINOL Level 3: Phytosterols stimulate collagen and elastin

and Sodium Hydroxide

giving a radiant finish to natural skin or over makeup

to add a natural glisten and protective finish

and pat dry

Dr Koo Level 1 Retinol | Sensitive Skin Renewal Shop-All RETINOL Level 3: Phytosterols stimulateFormulated 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