Yam contains about 13% sugar, which is not high enough to be consumed in moderation compared to other foods that provide a source of carbohydrates (e.g., potatoes 17%, sweet potatoes 24%, corn 23%). Yam contains mainly starch, which mainly provides carbohydrates to the body and energy for basic activities of life. Compared to green leafy vegetables and fruits its sugar content is high, but it is richer in carbohydrates, which cannot be provided by green leafy vegetables and fruits. For other major daily sources of carbohydrates (e.g. rice, sweet potatoes, etc.), their sugar content is lower and their intake can be increased appropriately. Yam is not high in sugars, and for those who need to control blood glucose and those who have lost weight, their intake can be appropriately increased to reduce the intake of other staple foods with higher sugars. For individualized diets for patients with diseases, it is recommended to formulate them under the guidance of professional doctors.