As a replacement product for hypothyroidism, Eucerin not only has a therapeutic effect on hypothyroidism, but also inhibits the possibility of thyroid cancer. Doctors do not recommend excessive use in the early stages of the disease, so it may result in too little thyroid hormone, leading to insufficient metabolism in the body and ultimately causing obesity. Eugenol, also known as levothyroxine, is used as a replacement medicine for patients with hypothyroidism and needs to be taken for a long period of time. After the patient has just got hypothyroidism, it will slow down the metabolism, that is to say, the nutritional absorption should be greater than the consumption, and naturally there will be the phenomenon of weight gain, the doctor will according to the patient’s course of the disease and the severity of the disease to increase the dosage of medicine appropriately and gradually, to maintain the normal thyroid function sound. Until the dosage reaches the necessary level, the patient’s thyroxine is at a low value, and the body will accumulate too much fat and protein, making it difficult to consume. During this period, due to the patient’s mental condition are reduced outdoor activities and lack of exercise, leading to further accumulation of fat. Especially patients with hypothyroidism, most of them have good digestion and absorption function, so obesity is a normal phenomenon, and it is more likely to occur for those who are accompanied by high blood fat and high cholesterol. In the early stage of patients eating eugenol, there may be symptoms of obesity, adjusting dietary habits, appropriate increase in outdoor exercise, improve the quality of life, the body will gradually thin down, will not affect the normal health of the body.