Zinc is a nutrient that plays many important roles in your body. It is also involved in many cellular functions and is required for the activity of many enzymes that aid in metabolism, digestion, nerve function, and more. Zinc aids energy levels and promotes cognitive health Quercetin is a natural pigment found in many fruits, vegetables and grains. It is one of the most abundant antioxidants in the diet and plays an important role in helping the body fight free radical damage.