Life Extension Quercetin, 500 mg, 100 capsules

Quercetin is a bioflavonoid that supports cellular health and function. In human cell culture studies, it has been shown to block the manufacture and release of inflammation-causing substances,293-296 which can help support a healthy immune response to the seasonally changing environment. It also helps promote a healthy cardiovascular system by preserving endothelial integrity297-300 and supporting healthy blood glucose levels for those already within normal range.301-307