Carnosine Vs. Carnitine

左旋肉碱和肌肽都是由氨基酸组成，但不同的。肉碱是从赖氨酸和蛋氨酸合成，而肌肽选自丙氨酸和组氨酸制成。对于左旋肉碱的最佳来源和肌肽是肉类，奶制品，家禽和鱼，但他们也可作为补充。

Carnitine burns fat by transporting fatty acids into the mitochondria inside cells, where the fats are converted into energy. It also transports toxic wastes out of the mitochondria. Large concentrations of carnitine are found in skeletal and cardiac muscle. Carnitine may help lower the pain associated with diabetic neuropathy and reduce the symptoms of an overactive thyroid.

肌肽的功能在大脑中的抗氧化剂，神经系统和骨骼肌肉。虽然他们不知道它确切的方式，这也是一个螯合剂去除过量的从体内锌和铜。研究表明是帮助白内障和提高伤口愈合。

Carnitine and carnosine may help slow the progression of age-related memory loss and Alzheimer's disease. A study in the March 2011 edition of "PLoS One" by Carlo Corona et al. indicates that carnosine reduces the accumulation of amyloid tangles that cause Alzheimer's. Carnitine slows the progression of memory loss by enhancing memory-related proteins, according to researched published by Xia Jiang et al. in the June 2011 edition of the "Journal of Neurochemistry." They also provide cardiovascular benefits, but in different ways. Evidence suggests that carnosine reduces the risk of atherosclerosis and lowers cholesterol, while carnitine relieves symptoms of angina and peripheral vascular disease.

八周后肌肽,auti儿童sm demonstrated significant improvements in behavior and communication, according to research conducted by Michael Chez, M.D., et al. and published in the November 2002 issue of the "Journal of Child Neurology." Dan Rossignol, M.D., reviewed previous research into the effectiveness of alternative and off-label treatments for autism. His results, published in the October 2009 edition of the "Annals of Clinical Psychiatry," gave carnitine a grade "B" and carnosine a grade of "C." These grades indicate that both substances may improve symptoms related to autism, but the studies supporting carnitine were better designed and more reliable.

Even though carnitine and carnosine are both marketed as supplements to improve sports performance, there is no evidence that it works, according to the University of Maryland Medical Center. Carnitine is available in several forms, but you should avoid D-carnitine because it interferes with the natural form of L-carnitine.