L-carnitine is not a supplementary nutrient. Healthy people don't need extra supplements. People who lose weight need to use it under the guidance of a professional dietitian or doctor to avoid negative reactions. In addition, healthy red meat and dairy products are abundant, so there is no need to supplement them with drugs or health products. Pay special attention to commercial propaganda.

The study of carnitine began in the early 20th century. 1905, Russians Gulewitsch and Krimberg discovered L- carnitine from meat extract. Since then, scientists from various countries have conducted in-depth research. Early research found that L-carnitine is a vitamin nutrient and named it vitamin BT. In fact, the chemical structure of alkali is similar to choline and amino acid; In addition, because some animals can meet the demand of carnitine through their own synthesis, it is considered that carnitine is not a vitamin, but it is still called vitamin BT. Experiments show that L-carnitine is an essential nutrient. L- carnitine was designated as a "multifunctional nutrient" at the international nutrition conference held in Chicago on 1985.

Note: those who intend to improve obesity metabolism and muscle capacity are generally advised to stop using it for one week after one month; Taking a large amount (5 grams per day for adults, except AIDS patients) may cause diarrhea. L-carnitine is not recommended for patients with liver or kidney diseases.

For the use of L-carnitine, it is recommended to consult relevant professional nutritionists or doctors. If the supplementary effect is achieved through diet, there is no need to buy and use it.