<prompt> Glutathione requires which vitamin to act as antioxidant -Vitamin ENiacinVitamin CVitamin A  <response>: Ans. is b i.e., Niacin o Option a, c d are themselves antioxidants, but glutatbion requires niacin as NADPH.o NADPH is necessary tor the maintenance of a reducing environment in the cell.o NADPH plays a key role in antioxidant defences by converting the oxidized glutathione into the reduced glutathione, which is protective. 