In Sun Zhenren's "Avoid Eating", arborvitae leaves and sesame oil are used to treat alopecia and gray hair. Sesame oil, also called sesame oil, is a traditional seasoning vegetable oil in China. It is extracted from sesame seeds and has a strong aroma of fried sesame seeds. Sesame oil on the market can be mainly divided into black sesame oil and white sesame oil, which are called sesame oil and actually belong to one kind of sesame oil. Black sesame oil, white sesame oil and sesame oil are all extracted from sesame. The sesame oil mentioned in Sun Zhenren's food record is now sesame oil.