Using ethanol in a retinol serum is generally not recommended.
While it achieves fast evaporation, it often does more harm than good.
Why it's a bad idea:
1. Skin Barrier Damage
Ethanol strips natural lipids. Since retinol already causes dryness and peeling, combining them can lead to severe irritation or "retinol burn."
2. Enhanced Penetration (The Risk)
Alcohol pushes retinol deeper and faster into the skin. While this sounds beneficial, with a potent active like retinol it often triggers inflammation.
3. Oxidation Risk
Retinol is highly unstable. Pure ethanol can accelerate degradation if the formula is not professionally stabilized.
Better Alternatives for Fast Absorption:
Propanediol – A gentler solvent that absorbs quickly without the harsh drying effect.
Cyclomethicone – A volatile silicone that provides a silky finish and evaporates rapidly.
Dimethyl Isosorbide (DMI) – Enhances penetration safely with a fast dry-down.
The Bottom Line:
Avoid DIY modification. If you want a dry finish, choose a “dry oil” retinol or a micro-encapsulated formula labeled as quick-absorbing.