Mar 13, First we think it's worth sharing some facts about tea and caffeine. True tea is made White, green, oolong, and black teas all come from this plant, and all contain caffeine. Our herbal teas Tea, mg. Coffee, mg. May 31, Find out how much caffeine is in coffee, tea, hot chocolate, cola, energy drinks, Similarly, teas blended with other ingredients (such as mint green teas or on tea grade and tea brewing method, see Caffeine in Teabags vs. Most people swear by either coffee or tea to get their daily caffeine fix, but the benefits of these two beverages extend far beyond a simple pick-me-up. See how . Coffee vs. Tea Tea leaves have more caffeine than coffee beans before they are brewed. . Does anyone know if the brewing process in green tea reduces caffeine to the. Sep 27, However, just like regular tea, green tea contains caffeine. Caffeine is found in a wide range of beverages like black tea, coffee, soft drinks. Jun 9, Here's how much caffeine content is in that coffee, green tea, Diet Coke, Red Bull and more — and what it's really doing inside our bodies.