What"s the secret?It all began with health scientists trying to create a product to provide sustained energy for chemotherapy patients. They discovered Quercetin (pronounced kwur-si-tin}, a powerful all natural antioxidant and combined it with Green Tea Catechins. Their patented formula was called FRS, and it quickly became the "secret weapon" for many elite athletes. Lately, FRS has become the choice for people looking to increase their energy and stamina to get through a busy day without crashing. Comparison of flavonoid antioxidants per serving:FRS Healthy Energy 410mgBlueberries: 120mgApples: 20mg