What are the best antioxidants? between foods,beverages and herbal supplements

Antioxidants : Grape and pure grape juice

Nobody really knows: There are thousands of supplements advertised to do all sorts of magical remedies. Very few supplements have real research studies to show benefits (but manufacturers make claims, based on theories, animal tests, testimonials, chemical similarities, etc... but not upon real research because real research is hard to do and is expensive to do). Also, how does one know what really is in a supplement?