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The Encyclopedia Of Nutrition And Good Health - N

Bách khoa toàn thư - Dinh dưỡng và sức khỏe tốt - Vần N | N N-acetylcysteine NAC A derivative of the sulfur-containing amino acid cysteine that occurs naturally in the body N-acetylcysteine is used to produce the powerful cell antioxidant glutathione. This sulfur compound delivers cysteine to cells. It has been used medicinally to reduce mucus buildup in people suffering from respiratory ailments such as chronic bronchitis and asthma and adult respiratory distress syndrome. NAC may help reduce the risk of heart attack in patients with unstable chest pain. It is also helpful as an IV treatment in ridding the body of toxic levels of the nonsteroidal anti-inflammatory drug NSAID acetaminophen. Now also available as a dietary supplement N-acetylcysteine is promoted as an aid in boosting the body s immune system preventing heart disease and cancer and slowing the progression of parkinson s disease and multiple sclerosis. Initial studies indicate N-acetylcysteine shows promise in treating some or all of the conditions. However additional research is needed to confirm these preliminary studies. Because N-acetylcysteine is sold as a dietary supplement for treating these conditions and not as a drug its safety and efficacy has not been tested by the U.S. Food and Drug Administration FDA or any other government agency. Breast-feeding women should avoid NAC. Pregnant women should use it only with a doctor s prescription. Grandjean E. M. P. Berthet R. Ruffmann et al. Efficacy of Oral Long-Term N-acetylcysteine in Chronic Bronchopulmonary Disease A Meta-Analysis of Published Double-Blind Placebo-Controlled Clinical Trials Clinical Therapy 22 2000 209-221. naphthoquinone See vitamin k. narcotics See addiction. National Cholesterol Education Program See cholesterol. National Marine Fisheries Service Organization that is part of the National oceanic and Atmospheric Association NOAA responsible for overseeing fisheries management in the United States. under the federal Agricultural Marketing Act of 1946 NOAA administers a voluntary .