Retinoid Conversion Timeline
Visualize the enzymatic steps required for Vitamin A derivatives to become active Retinoic Acid.
Retinyl Palmitate
Retinol
(Esterases)
Retinaldehyde
(Alcohol Dehydrogenase)
Retinoic Acid
(Retinaldehyde Dehydrogenase)
3 Steps to Active: Highly stable but requires three distinct enzymatic cleavages. Minimal efficacy for anti-aging; acts mostly as an antioxidant.
2 Steps to Active: The industry standard. Conversion rate is highly variable depending on individual metabolic pathways. Moderate irritation.
1 Step to Active: Direct precursor to Retinoic Acid. Shows comparable clinical efficacy to Tretinoin with significantly less barrier disruption.
0 Steps (Direct Action): Prescription only. Binds directly to RAR/RXR receptors in the skin. High efficacy, high irritation risk.