LONGECITY

I have read plenty of forums here about resveratrol and its positive/negative side effects,,,,I would much appreciate anyones favourite resveratrol and why so i can make an informed decision of which to buy since I have never bought it before...
I need to feel more energetic...I have been feeling quite lethargic for a long time....after birth of baby....am taking iron tablets but not seeing a big difference....also would like to lose weight and if resv helps diminish hunger pangs....well i would be happy to take it
So i would really appreciate you insight
thank you