Citrus bioflavonoid extract from lemons, oranges or grapefruits. Flavonoids are also phytochemicals in plants that have disease and free radical fighting capabilities due to their various anti-inflammatory, antioxidant and anti-microbial functions. They protect the plant from disease and cellular damage. When we consume the plant or the extracts, the theory is that we benefit from these same protective factors. In vitro (in lab, test tube) studies show the potential for flavonoids to fight and kill cancer cells. In vivo (live, in body) studies are rather inconclusive at this time, but only because we’ve just scratched the surface. When flavonoids are metabolized in the body, there is very little left of the original compound; however, some studies are indicating that it is the act of metabolizing these flavonoids that offers us the benefits. Many supplement formulas use bioflavonoids. They likely have some benefits, albeit unproven at this time. Eriodictyol glycoside is one of the ingredients in Lipoflavonoid, a supplement meant for tinnitus sufferers. In this case, it has not been proven as an effective remedy, but is more likely to help those who suffer from Meniere’s disease and who experience dizziness.