Resveratrol is a natural chemical that is usually found on the skin of the red grapes. It is at par with the other powerful antioxidants like anthocyanadin and flavanoids. It is known to destroy the free radicals that have a lot of ill effects on the body like the various cardiovascular diseases and aging.

Hence, it is believed that the regular intake of resveratrol can actually stop ageing thereby increasing the longevity. Aging happens when the free radicals destruct the body cells. The regular intake of resvertrol can help to destruct the free radicals thereby preventing the death of body cells. This in theory can increase longevity.

Also, resveratrol is known to be very effective against problems like cardiovascular diseases, high blood pressure and diabetes. This means that it can actually increase the chances of a person not getting affected by these diseases. Hence, the life expectancy of that person will automatically increase.

The biggest factor that clarifies the role of Resveratrol is its activation of the SIRT1 gene. This gene is instrumental in the activation of the protein and enzyme named, Sirtuin. Sirtuin is considered to be an element that protects the cells and help them to repair themselves when they are facing destruction. When the cells are about to die, the Sirtuin helps it by healing the cell. As it does not allow the cells to die fast, the ageing process also gets delayed hence the person gets a longer youth. It also increases his or her life expectancy.