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.
If any of these effects persist or worsen, contact your doctor promptly. Tell your doctor immediately if any of these unlikely but serious side effects occur: fast/ irregular heartbeat, mental/mood changes (e.g., nervousness, confusion), trouble sleeping, restlessness, shakiness (tremor), seizures.A very serious allergic reaction to this product is rare.ses. Green tea contains caffeine and it has been used to increase alertness. Green tea has also been used for cancer prevention, to lower cholesterol, and to prevent/delay Parkinson's disease. Some herbal/diet supplement products have been found to contain possibly harmful impurities/additives.