Concord grapes, blueberries, blackberries, raspberries and cranberries.
This group is a polyphenol-rich berry blend built around resveratrol, a compound most associated with red grapes and widely studied for antioxidant activity.
Concord grapes lead the group, joined by four common berries that each carry their own independent antioxidant research base beyond resveratrol alone.
The blend is also the primary source of TonicGreens' naturally pleasant flavor profile, according to the brand — berries doing double duty as both function and taste.