does oolong tea have caffeine

Does Oolong Tea Have Caffeine? Yes, oolong tea naturally contains caffeine, but usually less than black tea and more than green tea. On average, an 8-ounce cup of oolong tea has 30–50 mg of caffeine, depending on leaf type, oxidation level, and brewing method. Oolong also contains L-theanine, which works with caffeine to provide a…