It is well known and understood in the bosom of the world’s anti-aging and beauty forum...... that the ONLY proven anti-aging ingredient on the market today is .......Retinol. This ingredient is fundamentally what everything else aspires to become. Antioxidant, collagen building, wrinkle eradicating, tone correcting, texture refining, skin thickening and pore tightening. This is Retinol. The down side as we all know is that many skin types cannot tolerate the irritation and sun sensitivity that comes along with this stand alone ingredient. Which is why RSL has massively upgraded our retinol into a form that does NOT irritate the skin, DOES add moisture to the skin, and has ALL of the benefits of standard Retinol minus the slight smell and color. Its a beautiful thing.....and that's our thing.