Considered “un-oxidized”, nearly all green teas come from Japan or China. In Japan, the leaves are picked and then steamed to neutralize the enzymes resulting in a fresh, bright green color with a grassy, nutty flavor and aroma. In China, the leaves are tossed in a hot pan, releasing a more vegetal and sometimes nutty flavor and aroma. There is low to moderate caffeine. With its high antioxidant profile, green tea receives the most attention for its health benefits.