What Are Quercetin & Resveratrol?

Quercetin and resveratrol are two of the most talked-about plant compounds in nutrition science, and they anchor two of TonicGreens' six formula groups.

Quercetin

Quercetin is a flavonoid found in many common vegetables and fruits — kale, broccoli, green bell pepper, and citrus among them. It's studied for its antioxidant properties and its role in supporting normal cellular function.

Resveratrol

Resveratrol is a polyphenol concentrated in the skins of dark berries and grapes. TonicGreens' resveratrol group draws from concord grapes, blueberries, blackberries, raspberries, and cranberries — a combination chosen as much for antioxidant content as for a naturally pleasant flavor profile.

Why Group Them Separately

Rather than folding these into one undifferentiated blend, TonicGreens breaks them into their own named groups on the label — one of the details several reviewers specifically mention as a reason they trust what they're buying.

See the full six-group breakdown on our ingredients page.