REJUVENOL C CONTAINS O.P.C. 100 WHICH IS A PURE GRAPE SEED EXTRACT TYPICALLY CONTAINING 99% OR MORE OF PRO-ANTHRO-CYANINDINS. VITAMIN C IS ADDED AS IT COMPLIMENTS AND POTENTIATES THE ACTIONS OF O.P.C. O.P.C. ARE THE STRONGEST FORM OF NATURALLY OCCURRING ANTI OXIDANTS