Yams can be eaten without peeling. Yam is a very valuable food, and yam peel is also a very nutritious substance. Yam skin has high nutritional and medicinal value, can prevent fat deposits in the cardiovascular system, medical has been used as a prevention and treatment of atherosclerosis drugs. Therefore yam without peeling, boiled and eaten, is the correct way to eat, peel but easy to damage the nutrition of yam. But if the yam is eaten without peeling, the taste is a bit earthy and astringent, which will affect the taste. However, yam skin is edible and beneficial to the human body, because yam skin is rich in alkaloids, which are effective for skin beauty. But it should not be consumed in excess, some people are allergic to alkaloids. Therefore, if you have allergies, do not consume yam bark.