Trans-resveratrol is believed to be the most active form of resveratrol. It is one form of a compound produced by some plants to combat fungal infection. When ingested, it might provide health benefits, ranging from protection against disease to anti-aging properties.
Trans-resveratrol metabolism occurs rapidly once it is ingested, which means that it doesn’t spend much time in the body before being altered and eliminated. The levels of trans-resveratrol and its metabolites are at their highest about 30 minutes after consumption. In laboratory studies, it has shown that trans-resveratrol acts as a powerful antioxidant, binds to estrogen receptors, inhibits tumor activity and affects cellular enzymes.
The main dietary source of trans-resveratrol is red wine, but other forms of wine and other grape products also contain this compound. Red wines and dark grape juices have more trans-resveratrol than white wine or juice. Other berries, including bilberries, cranberries and blueberries, also contain trans-resveratrol. Peanuts and peanut butter are another food source of resveratrol.