retinoid
Retinol
Also sold as Vitamin A
Retinol appears in 4 products in this index, 3 of which publish a strength — the highest is 1% in Paula's Choice 1% Retinol Treatment. It works between pH 5 and 6.
Mechanism
Converts in skin to retinaldehyde and then retinoic acid, binding nuclear retinoic acid receptors. Increases epidermal turnover and procollagen synthesis. Degrades under UV and above pH 6.
Products containing it
sorted by published strength| Product | Size | Strength | Best price | Per ml of active |
|---|---|---|---|---|
1% Retinol Treatment Paula's Choice | 30 ml | 1% | awaiting retailer | — |
Retinol 0.5% in Squalane The Ordinary | 30 ml | 0.5% | awaiting retailer | — |
0.3% Retinol + 2% Bakuchiol Treatment Paula's Choice | 30 ml | 0.3% | awaiting retailer | — |
 Granactive Retinoid 2% Emulsion The Ordinary | 30 ml | unstated | $12.10 | — |
Cost per active is price divided by the volume of pure active in the bottle. It appears once retailer prices are being tracked, and only for products whose strength the maker publishes.