Can consuming more antioxidants prevent cancer ?

Only if your body has too little antioxidants at its disposal. Though toxic HCA originate oxidative radicals  , and decrease antioxidant level  , extra antioxidants cannot prevent the damaging effects of toxic HCA.

To absorb sufficient antioxidants, you only need to consume lots of fruits, containing all the antioxidants you need. Consuming more antioxidants can impossibly prevent cancer. Don't force your body to absorb more antioxidants by taking supplements. Supplements are far too concentrated, not allowing the body to avert excessive antioxidants.