From the perspective of traditional Chinese medicine, thinness is mostly caused by weakness of the spleen and stomach. When the transportation of spleen is unfavorable, it is difficult for people to absorb nutrients, and people gradually become thinner. However, Chinese medicine pays attention to the five internal organs as a whole, so there are many reasons for spleen and stomach weakness, such as liver depression and kidney deficiency. The dried tangerine peel, poria cocos, endothelium corneum Gigeriae Galli and bergamot have the effects of soothing the liver, relieving depression, strengthening the spleen and nourishing the stomach, which are extremely beneficial to the weakness of the spleen and stomach caused by liver depression and qi stagnation, and can cause the thin people to get fat gradually. However, if it is thin due to kidney deficiency or other factors, it will have no effect. The effective situation generally depends on the patient's own situation. If people with liver depression and spleen deficiency are not serious, it will have an effect for one week, and some people will have an effect for one month or three months. If it still doesn't work after three months, then it is suggested to find a good Chinese medicine practitioner to dialectically again. That's my answer to your question. Thank you.