However, it is likely that all-. natural energy drinks may contain as. much caffeine as regular energy drinks, albeit from natural sources. Therefore, natural energy drinks could differentiate. by listing the amount of caffeine on. packaging, if the product has less caffeine.
Description. Oi Ocha is Japan's #1 green tea brand and means Tea, please!. Unsweetened. No calories. With more than 100% RDA of Vitamin C.  1  All natural. 2  Unsweetened.
The big difference between black tea and green or oolong tea is that it is far more oxidized. That means black tea has a lot more color, flavor and higher levels of caffeine. This oxidation process also means that Black tea also retains its quality and flavor for years longer than any other type of tea. By the way Caffeine in moderation is a good thing. While there are many claims about the benefits of black tea, we wanted to find real evidence.