text: caffeine in tea bags? tea bags contain herbal medicines specifically the leaves. these leaves contain caffeine. after doing an experiment on the extraction of caffeine using chloroform, the result showed 0% recovery of caffeine. what could be the possible reason for this? we followed the right procedures and were very meticulous in doing the experiment. the tea bags used were tsaang gubat tea. does this mean that tsaang gubat doesn't contain caffeine? please i need your answers and explanations. thanks! the obvious answer is that the tea bag you used was de-caffeinated. any other explanation might be from experimental error.