REN Clean Skincare Bio Retinoid Youth Concentrate Oil is powered by REN's plant-derived alternative to retinol, Bidens Pilosa, this new-formula evening oil is proven to visibly reduce fine lines and wrinkles after 28 days while being designed to help limit irritation, making it suitable for sensitive skin. With 99% natural-origin ingredients, including Organic Rosehip Oil (rich in Omega 3 and 6) to help strengthen the skin’s moisture barrier, improve firmness and suppleness; while Sea Buckthorn Oil helps nourish, reduce roughness, and combat the dulling effects of dryness or dehydration, for a healthier-looking complexion.