Description: Unlike other products, each production batch of Twinlab bioflavonoids is assayed by independent laboratories and tested by HPLC (High Pressure Liquid Chromatography) to measure and assure true content of the individual and total bioflavonoids. Twinlab offers the highest bioflavonoid content concentrated from fresh lemons, oranges, grapefruits, limes and tangerines, along with the greatest number of individual bioflavonoids available from any manufacturer. Packaged in a glass bottle for maximum stability, quality and freshness. This product is manufactured at our own state of the art facility. Ingredients: Other Ingredients: Gelatin, Purified Water, MCT, Magnesium Stearate.