For more details on this topic, see deuterium. A deuterium atom contains one proton, one neutron, and one electron. 2H (atomic mass 2.013553212724(78) u), the other stable hydrogen isotope, is known as deuterium and contains one proton and one neutron in its nucleus.
The caffeine in green tea, especially when taken in large amounts, can worsen diarrhea. Irritable bowel syndrome (IBS) : Green tea contains caffeine. The caffeine in green tea, especially when taken in large amounts, can worsen diarrhea and might worsen symptoms of IBS.
The symptoms of diarrhea are frequent, loose or watery stools, and a subjective sense of urgency. An excessive number of high amplitude propagating contractions [rapid transit] can be a cause of diarrhea; it reduces the amount of time food residues remain in the large intestine for water to be reabsorbed.