Tret-A lotion (Retinaldehyde) is the Precursor to Retinoic acid with little or no irritation.
 
For use PM
All skin types
 
In Clinical Trials vs. Tretinoin, Tret-A Showed Equal Efficacy/Less Irritation
Coverts to Retinoic Acid Intracellular
20 Times more Potent than Retinol