Yam is a good source of energy

100 g provides 118 calories. It mainly composed of complex carbohydrates and soluble dietary fiber. Together, they raise blood sugar levels rather very slowly than simple sugars and therefore, recommended as the low glycemic index healthy food. In addition, dietary fiber helps reduce constipation, decrease bad (LDL) cholesterol levels by binding to it in the intestines and prevent colon cancer risks by preventing toxic compounds in the food from adhering to the colon mucosa.