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 caffeine found in green tea is partly responsible for its weight-loss effects. Caffeine is not without side effects, and too much can cause toxicity.ide Effects and Precautions. Side effects of caffeine include increased heart rate, insomnia, nausea and vomiting, frequent urination, tremors, anxiety and depression. Consult with your doctor before drinking green tea if you have a medical condition.