As a "western wood doctor" in the media wantonly sell, called L-carnitine in the health care products has recently become a popular weight loss of domestic products. The Dr. Ph.D. in economics, how to sell if he Laijiang Jiang and his health care professional may also be detached, to hear him to lose weight so do not fly, unless the weight loss as the body economics. But most people see the ocean for a doctorate, with regard to this person must be Shangzhi astronomy knowledge of geography, threading the body of experts, health care and then the maverick theory have become authoritative point of view, which control what areas he is a Ph.D. .
L-carnitine is what is it? It was originally from the meat
Isolated a compound, so it is called carnitine. This compound has two similar structures, just like the left and right images do not overlap each other, are called left and right hand. Only the kind of L-carnitine in the body have a function. Distribution of L-carnitine in the body almost all the cells, and human relating to the use of fat. Human need to "burn fat", that is, to use the energy stored in the fat, the first break down fat into fatty acids and fatty acids to the cells of the "energy factories" - mitochondria, where it oxidized, releasing out of energy. Fatty acids can not enter the mitochondria themselves, need to ride in, this car is the L-carnitine. Mitochondrial metabolism of certain hazardous wastes generated by the L-carnitine and then shipped out. If there is no L-carnitine, the body can not burn fat.
L-carnitine can see a very important physiological functions. Healthy human liver and kidney of L-carnitine can make enough to meet the needs of the body is the use of synthetic lysine and methionine. These two amino acids are common in food, so L-carnitine is not essential nutrients. L-carnitine in food can also be absorbed by the body. Foods generally contain L-carnitine, especially meat, dairy products, the most abundant, on the contrary, grain, vegetables, fruits, seldom in the L-carnitine. For example, 100 grams of beef contains about 90 mg of L-carnitine, but only about 100 grams of rice, containing 0.05 mg. If a person eating a balanced intake of food a day from about 60 to 180 mg of L-carnitine, and pure vegetarians who can only intake about 10 to 12 mg. However, since L-carnitine needed to make their own synthesis of the human body, so do not care about how much content in food. Only suffering from certain diseases (such as chronic renal failure) or eat a certain drug, caused a disturbance of bodily functions, it need extra carnitine.
Some people think that if healthy people ate health care products through a large number of extra L-carnitine supplement, is not to burn body fat can contribute to it? The idea is like mine more than want to sent a number of trucks to transport coal, to increase the thermal power plant generating capacity. The problem is not lack of human body fat transport vehicles, like how many cars can own making, and then sent a car coming from the outside but also how much of it? L-carnitine in the body of food absorption rate of only 5%% 15%%, that is, if the two grams of oral L-carnitine, only about 0.1 to 0.3 grams can enter the body. And a human body has about 20 grams of L-carnitine, the amount of foreign compared with L-carnitine is negligible. If the capital increase at the amount of oral L-carnitine it? Also no use, because if the amount of fluid in the high L-carnitine, it will go from the urine, taking L-carnitine in large numbers only in the manufacture of expensive urine.
So want to add extra L-carnitine to promote fat burning, only a naive, simple idea, but it can achieve a lot of people have fantasies they want to take a class athletes to gain more energy to enhance athletic performance One is to lose weight to obesity.
This is not the "West Wood Dr.," the first thought or a salesman, has been abroad 20 years ago under which health care products in the marketing of L-carnitine. However, the effectiveness of a health care products are not derived from theory alone (especially a flawed theory), animal experiments can not be alone, and medications need to have human clinical trials. Since 1985, there are 2 dozen 9 grams of oral L-carnitine effect on athletic performance in clinical trials, most found no effect, the individual found to reduce the accumulation of lactic acid and increased oxygen consumption. Of oral L-carnitine is very little clinical trials to lose weight, I found only one, is the Royal Melbourne Institute of Technology in 2000 to do research, 36 moderately overweight women were randomly divided into two groups to do double-blind controlled trial. Experimental group, two grams twice daily oral L-carnitine in the control group was treated with the same amount of lactose as a placebo, subjects did not know was in which group, the researchers do not know (ie, "double blind"), group case by a third party control, test solution after the completion of the statistical blind, so as to avoid the test results to the subjective bias. Both groups do moderate exercise (walking a day 4 days a week for 30 minutes.) After 8 weeks, both groups found that the amount of body weight and fat changes are not different from that of oral L-carnitine does not help to lose weight.
L-Carnitine health care ad claims: "Only in the large amount of movement when taking L-carnitine to help maintain weight loss." Null and void if the weight loss were attributed to not exercise enough. But animal studies show that animals in the high-intensity exercise to force the case of oral L-carnitine can not be allowed to further reduce weight, weight loss is caused due to movement. Large amount of exercise have been able to lose weight, eat in this case, of course, that L-carnitine effective. Such an obvious scam actually so many people believe. If I learn to develop a weight loss product, claiming that only in the case of eat less and exercise to help maintain weight loss, is not someone think it would be more effective than L-carnitine?
