L-carnitine is an amino acid, mainly from red meat foods, such as pork, beef, lamb, etc. Proper intake can help convert fat into energy, which has a certain effect on weight loss, and therefore has become one of the main ingredients of many weight loss products. However, excessive intake may be harmful to the human gastrointestinal tract and organ functions: 1, gastrointestinal tract dysfunction: excessive consumption may cause gastrointestinal tract dysfunction, which may lead to indigestion, stomach pain, bloating, diarrhea and other adverse reactions; 2, organ damage: excessive consumption can cause fatty acid metabolism disorders, which have a certain impact on liver and kidney functions. It can also lead to insufficient blood supply to the heart and brain of some women, as well as panic, palpitations, arrhythmia, chest pain and other uncomfortable symptoms; 3, menstrual disorders: some women may also experience menstrual disorders, including reduced menstrual volume, black color, blood clots, etc., and in serious cases can even lead to amenorrhea, and can also lead to a decline in the reproductive system and endocrine function; 4, muscle weakness: some women may also appear after the use of limbs The symptoms of weakness, muscle weakness, and in serious cases, muscle atrophy; 5, mental changes: L-carnitine has an excitatory effect, women consume a lot of it, may lead to a decline in sleep quality, prone to abnormal excitement, irritability, anxiety and other symptoms. It is recommended that women who want to lose weight should first lose weight through a reasonable diet and moderate exercise. If the weight loss effect is not satisfactory, you can take the appropriate drugs under the guidance of a doctor, but do not take drugs privately. For women with excessive weight that seriously affects their health, they can also choose surgery according to medical advice.