Usually, lecithin is not harmful to women when eaten properly, but it is only when eaten in excess that it can cause some harm. Lecithin is a phospholipid with a high content in human tissues, also called methionine, and is widely found in the human blood and nervous system, and has the functions of antioxidant, eliminating free radicals, protecting the liver and heart, and cleaning blood vessels. Therefore, it is beneficial to eat foods rich in lecithin, such as animal offal, eggs, milk and soybeans. For patients with dyslipidemia, fatty liver or obesity due to fat metabolism disorders caused by lecithin deficiency, in addition to dietary supplementation of lecithin, it can also be supplemented by medication. However, it should be noted that lecithin should not be taken in excess, and the following hazards may exist in women: 1. neurological reactions: lecithin is involved in the regulation of the nervous system, and excessive supplementation of lecithin may cause neurological disorders, headaches, dizziness and other symptoms; 2. cardiovascular reactions: eating lecithin appropriately can help regulate the metabolism of lipids such as cholesterol and triglycerides, but long-term excessive supplementation may cause lipid metabolic disorders, prone to atherosclerosis; 3, gastrointestinal reactions: excessive supplementation of lecithin can disrupt the function of the gastrointestinal tract, which is governed by the vegetative nerves, resulting in nausea, vomiting, diarrhea and other uncomfortable symptoms. In addition, pregnant and lactating women should determine the need for oral lecithin under the guidance of a doctor, and should not take or discontinue it on their own to avoid damage to the body; or cause a lack of lecithin due to self withdrawal, resulting in abnormal fat metabolism and obesity and other adverse consequences.