, highest potency available in the uk, safe but powerful dose, a highly active flavonoid & one of the most researched, fast release tablet specially coated for ease of swallowingquercetin is the most researched of the flavonoids having been used in human trials & delivering some very compelling results. flavonoids are water-soluble plant pigments commonly found in black & green tea as well as in onions & apples. whilst an apple contains 5-10mg quercetin each of these tablets delivers a powerful 500mgthis product provides concentrated quercetin from natural plant sources in high doses to help protect your cells from oxidative damage as you push your body hard through training & sport. flavonoids convert free radicals into less reactive compounds protecting cell structure from damage & have the added benefits of reducing the body's production of histamines. recent research also highlights quercetin's beneficial effects on cardiovascular health.