REN Clean Skincare\'s Bio Retinoid Youth Concentrate Oil is made with 99% ingredients of natural origin and promotes a youthful complexion with its powerful anti-wrinkle formulation. Used as part of your evening routine and utilizes bidens pilosa, REN\'s plant-based retinol alternative, which is safe for use on sensitive skin types. Supporting ingredients such as omega-rich rosehip and sea buckthorn oils provide nourishing power, while promoting a resistant moisture barrier and improving structure. This facial oil has been shown to minimize fine lines and wrinkles visibly after 28 days of continuous use and helps you achieve a smoother and younger complexion over time.