Yam has high nutritional value and regular consumption of yam can replenish energy, carbohydrates, proteins as well as vitamins and minerals for the body. Yam is a common food, 100 grams of yam can provide the body with 251KJ of energy, 12.4g of carbohydrates, 1.9g of protein. 100 grams of yam also contains 5.0mg of vitamin C, as well as 213.0mg of potassium, 34.0mg of phosphorus and so on, to the human body to replenish the nutrition. However, when consuming yam, diabetic people should limit their consumption because yam is rich in carbohydrates, so yam should not be consumed in large quantities as a staple food group. Other people can properly eat yam, but not too much. Be careful to eat yam in moderation, and seek medical treatment if you feel unwell after consuming it.