Zentonil for the maintenance of normal liver function for dogs & & cats. Zentonil is a nutritional supplement for supporting normal liver function. It contains S-Adenosylmethionine (SAM-e), a molecule that is produced by all living cells & has a very important role in the production of Glutathione, one of the liver's major antioxidants. Whenever a liver is compromised, the production of naturally occurring antioxidants is decreased & a production of free oxygen radicals increases. Free oxygen radicals damage cell membranes & are thought to be the main mechanism of liver cell destruction. Antioxidants are liver's main defence during this process. Around 45% of cats & dogs with liver problems have a low hepatic glutathione level. Zentonil is available in two strengths, for greater accuracy & ease of administration. Tablets are enteric-coated & should be given to the animal on an empty stomach. Enteric coating ensures that the active substance