Fueled by Quercetin. A powerful all natural antioxidant. What's our secret? It all began with health scientists trying to create a product to provide sustained energy for chemotherapy patients. They discovered Quercetin (pronounced kur-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. But don't take our word for it-read what real users say ay FRS.com, and you'll know all our secrets. Promise not to tell? We trust you!