Due to its high concentration of anthocyanins, freeze-dried jaboticaba peel/skin extract has a high ORAC.
The peel powder has been studied for improving insulin sensitivity in mice which were fed a high-fat diet (1).
The Brazilian grape tree ORAC is substantially lower when evaluated using the entire fruit.
Research Support, Non-U.S. Gov't: Leite-Legatti AV, Batista AG, Dragano NRV et al. Jaboticaba peel: Antioxidant compounds, antiproliferative and antimutagenic activities. Food Research International. Volume 49, Issue 1, Pages 596-603. Nov 2012