22+ Tea And Coffee Caffeine Difference Images. Tea caffeine is much milder, and the fact that it's usually in a lower concentration than coffee caffeine also helps with the general feeling, i guess. Both coffee and tea have legendary pasts, including wars that have been waged for access to these products.
Coffee and tea contain caffeine and theophylline, respectively, which are methylated purine derivatives that inhibit camp phosphodiesterase.
Another study noted that caffeine stimulates brown fat cells, thus causing them to burn more calories. Not as simple as many think. But not all caffeinated beverages are the same. An estimated 80% of the world's population enjoys a caffeinated product daily.