Tea is a beverage that is believed to give a lot of health benefits. Various epidemiological studies in many countries prove that the phytochemical compounds in tea have an impact on the decline in deaths from cancer, heart disease, and so forth. The content of phytochemicals in tea such as fluoride, amino acid L-theonine, an antioxidant flavonoid, quercetin, kaempfrol, myricetin, and caffeine.
It is estimated that each cup of tea contains about 15-40 mg of caffeine. Caffeine content was determined from the length of time the tea leaves are dried. Caffeine itself is a central nervous system stimulant that will increase the frequency of breathing, pulse, blood pressure, and stimulates the body to release stress hormones. Implications of the body such as dizziness, heart pounding, and insomnia (difficulty sleeping).