Its made from the plant camellia sinensis. Black tea has low Caffeine Promote the blood flow in the brain, without stimulating the heat & improve mental alertness and concentration. Black tea is a tremendous source of potent antioxidants. Vital for health and wellness, antioxidants encourage a strong immune system, disable free radicals, improve cardiovascular health, fight harmful inflammation, and provide protection against chronic disease (cancer, heart disease, to name a few). It has been found that blueberry has the highest antioxidants capacities among all fruits & spices. It reduces against againg & cancer. Regular intake of blueberry can help prevent heart attack, reduce blood pressure, help to improve brain function .