A Medline search of articles on tea and its health effects yields scores of reports in the medical and scientific literature in the past several years. What emerges is a significant body of literature from animal studies showing that green tea may prevent heart disease and cancer. Other studies have also suggested that it may help avert osteoporosis, a condition characterized by fragile bones, and that it might have beneficial effects on skin when applied topically.
Grown under shade for three weeks prior to plucking, gyokuro is one of the most exclusive varieties of tea produced in Japan.[60] The shading technique imparts a sweeter flavor, and produces a particularly rich color thanks to the higher amounts of chlorophyll in the shaded leaf. Gyokuro tea is associated with the Uji region, the first tea-growing region in Japan. It is often made using smaller-leaf cultivars of the tea plant.[61] 
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