Prevage MD contains the full strength 1% Idebenone. Allergan also produces a 0.5% Idebenone product called Prevage (no "MD") in conjunction with Elizabeth Arden. We recommend our full strength, 1% Idebenone Prevage MD. What does Prevage MD do? Prevage MD corrects the appearance of fine lines and wrinkles Prevage MD helps protect skin from environmental stressors known to cause skin aging Prevage MD improves the overall appearance of skin What makes Prevage MD work? 1% Idebenone (more powerful in preventing cell damage than five other popular antioxidants like vitamins C and E, co-enzyme Q10, kinetin and alpha lipoic acid). Idebenone is the most powerful topical antioxidant available with an EPF® rating of 95 out of 100.