Sunday Riley A+ High-Dose Retinoid Serum

One of the most bio-available, non-prescription forms of vitamin A products on the market, this pro-strength formula is for those who want serious results without the unwanted side effects of traditional retinol formulations. Combining 5% retinoid ester blend, 1% liposomal-encapsulated retinol blend, and 0.5% blue-green algae with natural, retinoid-alternative activity, this serum fights the signs of ageing and improves the look of congested and UV damaged skin.