Dr Koo Level 4 Retinol | Intensive Renewal Serum entry-protocol Finish with your favorite sunscreen

Finish with your favorite sunscreen or makeup routine

and normalized keratinocyte differentiation

A small amount between your palms

irregular texture

Spray 2 pumps of Hydration Myst

Dr Koo Level 4 Retinol | Intensive Renewal Serum entry-protocol Finish with your favorite sunscreenFormulated For Deep wrinkles, significant texture irregularity, advanced photoaging. Your skin has tolerated Level 3 and is ready for maximum intensity dermal renovation. This is the concentration Dr. Koo uses for pre surgical skin conditioning. The Mechanism At 8,000 IUs, Level 4 activates the full spectrum of nuclear receptor mediated gene transcription aggressive collagen induction, comprehensive MMP downregulation, and profound epidermal renewal.