Does decaff green tea have any caffeine in it?

Yes, decaffeinated green teas usually contain some amount of caffeine due to the method used to decaffeinate them. While "decaffeination" involves removing most of the caffeine from the tea, it does not eliminate it entirely. However, the caffeine levels in decaf green tea are far less compared to regular green tea. Typically, decaffeinated green teas have less than 2 milligrams of caffeine per cup, which is a significantly low amount compared to the average 30-50 milligrams in regular green tea. Some decaf green teas may be completely caffeine-free, but always check the product labeling for accurate information.