L-carnitine weight loss survey: limited effect "Fudge" unlimited

Business News Agency September 16 L-carnitine, a professional but unfamiliar vocabulary, but recently fired all over the north and south. It was promoted as "the most lazy weight-loss drug," and the weight-loss experts with doctoral titles have also spared no effort in publicizing their effectiveness in TV health programs. However, some experts believe that -

The 30-year-old Miss Yi has been trying to lose weight for five years. Dieting, exercise, all kinds of cellulose, diet pills... almost every kind of weight loss method has been tried again and again, but the effect has not been obvious. Some time ago, when Miss Yi was upset about this, the mother from Hunan Province called her and asked her to hurry to buy L-carnitine. It was a side-effect that Dr. Ximu recommended in Hunan Taiwan’s “Encyclopedia” program. The weight loss recipe.

"Before this, I never heard of the word L-carnitine," said Yi.

Since Dr. Xi Mu’s recommendation of L-carnitine on TV shows, L-carnitine has been enthusiastic for a while, and various brands of L-carnitine products have mushroomed.

28 days to lose 7-15 pounds, is it true or false?

In fact, before Dr. Nishi debuted, the people knew that L-carnitine was rare. As Dr. Shimu continued to visit guest stations in major TV stations such as Shandong, Tianjin, and Beijing, women who wanted to lose weight seemed to have known this fat burning weapon at night.

The host of Hunan TV station "Encyclopedia of Encyclopedics" said: "Dr. Ximu wants to introduce a slimming diet recipe for you. If you eat in this way, you can lose 7 to 15 pounds in 28 days."

"L-carnitine is extracted from lean meat and can turn fat into lean meat. It is a kind of lipase. The more fat people have, the less it contains. And this is a nutrient that can be used to burn fat, and it is absolutely Safety.” Dr. Ximu further explained in the program, “If you take L-carnitine, after a week, the hands and feet will be hot, indicating that fat is burning, including burning when you sleep.”

The weight-reducing recipe recommended by Westwood is 3-5 tablets of L-carnitine for each meal, plus 30-50 grams of cocoa powder for breakfast and lunch. On Dr. Ximu’s Sina blog, the dieting diet also claimed “28-50 pounds in 28 days and 3-6 cm in waist circumference.”

External effects need experimental verification

"The method of L-carnitine is not reliable, which is not controversial in the academic community." Wang Zebin, Ph.D., professor of food engineering at Purdue University and senior member of the American Food Technology Association, told reporters.

Wang Zebin first introduced L-carnitine. "Carnitine is an amino acid derivative that is widely found in cells. It has a different structure, and it has a structure that is present in living organisms. It is also a biologically active structure. The role of L-carnitine is to grow long. The fatty acids in the chain are transported to the mitochondria, where they 'burn' the energy. On the other hand, the toxic substances produced in the cells are transported away. Therefore, in animal tissues with high energy requirements, the content of L-carnitine is relatively high. , such as muscles, heart, etc."

The vice chairman of the China Nutrition Society and director of the Nutrition Evaluation Office of the Nutrition and Food Safety Institute of the Chinese Center for Disease Control and Prevention, Yang Weixin and Wang Zebin, all believe that: “The effect of L-carnitine is to move fatty acids from the mitochondrial inner membrane to the matrix, where Fatty acids 'burn' to generate energy, so its function is to help fat metabolism. So adding it to help 'burn fat' has become the 'theoretical basis' of its ability to lose weight. Such inference itself is not outrageous, but the human body is, after all, a In a very complex whole, we have not yet known what kind of digestion process L-carnitine has undergone. It is also necessary to verify the effectiveness of externally applied L-carnitine products.”

"The sale of L-carnitine as a weight-loss item is a concept of weight loss rather than a well-founded fact.” Wang Zebin added further, “The Office of Dietary Supplements of the National Institutes of Health (NIH) is targeting L-meat Alkaline made a comprehensive summary. This review referred to studies on the various functions of L-carnitine but did not mention weight loss."

Obesity: Energy intake is greater than expenditure

In fact, some people in China are conducting L-carnitine metabolism or weight loss experiments. In August 2004, Huang Zong rust and others from the Fujian Provincial Center for Disease Control and Prevention conducted a 35-day human trial on 110 simple obesity volunteers, and the subjects who received L-carnitine lost an average of 0.7 kg body weight.

The data of such scientific experiments is far from the “28 days minus 7-15 pounds” announced by Dr. Xi Mu.

China National Agricultural University's Department of Food Nutrition and Safety, the chief of any Jiguo said: "Although L-carnitine can increase the rate of lipolysis, it is the rate-limiting enzyme that determines the rate of lipolysis. Lipid metabolism is a continuous process in which several steps are The speed limit enzyme works, the simplest example is that when we eat at ordinary times, it is not easy to be hungry when we eat more fat foods, that is, rate-limiting enzymes limit the rate of decomposition of substances, and this catalytic process has nothing to do with carnitine. The fatty acids still need to be further decomposed, when L-carnitine comes into play, the rate-limiting enzyme is still needed, and carnitine is just a combination of raw materials. To accelerate the decomposition of fat, one is to exercise more and increase the consumption of fat. The other is to eat less and reduce your intake."

"The main physiological mechanism of obesity is that energy intake is greater than energy expenditure, and the energy balance is unbalanced. Excessive body energy intake or insufficient energy consumption can cause obesity, which is the main factor in obesity. Excessive energy intake is mainly reflected in In terms of dietary nutrition: irrational dietary patterns, excessive food intake, and poor eating habits are important factors leading to obesity.The lack of energy consumption is mainly reflected in lack of exercise.The weight loss health food containing L-carnitine can increase fat Metabolic effect, but at the same time taking such diet foods, a reasonable diet, control diet, exercise, in order to achieve better weight loss.” Yang Yuexin believes.

Have a suitable crowd and take taboos

Dr. Nishimu has always claimed that "L-carnitine is absolutely safe, because breast milk and infant milk powder are contained in it." Some of the online forum participants gave out different voices.

Some netizens said that after eating, not only did not lose weight, but there are side effects such as "dizziness, body heat and weakness"; some people have many adverse reactions such as constipation, abdominal distension, insomnia after taking; some women have ovulation after taking it. The symptoms of bleeding.

“An item is absolutely safe. This statement itself is wrong. There is no food in the world that is absolutely non-toxic, and there is absolutely no poisonous thing. It depends on the dose of intake. Sugar and salt are not necessary in daily life. Missing things, eating too much can also cause damage to the body." He Jiguo reminded, "If breastmilk contains, the human body can synthesize this substance itself, then there is no need to supplement the intake? Alkali is suitable for the population and taboos are usually consumed by athletes who can consume more energy, and the lack of L-carnitine in the normal population is less likely to happen.The side effects of L-carnitine are more commonly caused by disorders of the gastrointestinal tract. Patients with liver and kidney disease should take L-carnitine with caution because it promotes fat metabolism and may increase the burden on the kidneys and liver."

For Ximu’s view that “the fatter human body contains less L-carnitine”, Wang Zebin said: “The human body has the ability to automatically adjust the concentration of L-carnitine in the body. People who eat meat from food The amount of intake will be more, and if the person is vegetarian, the intake will be low, and if the intake is small, the human body will accumulate relatively well, and if the intake is high, the human body will discharge part of it through the urine. With the manufacturing function plus regulatory accumulation, the L-carnitine content in the body will be controlled at a reasonable level."

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