...this...? I heard about Resveratrol on TV (60 minutes?) and now noticed you could buy 500mg tablets in stores. It said on TV that it could help you live longer, fight many diseases etc...

Is this the same stuff? Is this the same potency? Should I buy this? Should I stock up and buy it for my whole family?

I just need some general info about what is available in stores and if it is like what was on TV