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.
1 Green tea has a more delicate taste than black tea. The oolong teas are a combination of green and black tea. 2  Non-herbal teas contain varying amounts of caffeine and antioxidants.  Non-herbal teas are made from leaves of tea plants.