1, advantages: the skin of iron stick yam is as nutritious as meat. Because the iron stick yam is thin and smooth, only 2-2.5 cm thick. After peeling, there is less meat left, which reduces the nutritional value. If you eat the skin together, you can make the human body absorb more effective ingredients and achieve better results.

2, joint pain: Because the skin of iron stick yam contains saponin and plant alkali, this substance belongs to allergens, and oral numbness may occur after eating. In severe cases, there may be other allergic symptoms such as itchy skin, and the epidermis tastes rough, and there is no delicate feeling of eating only yam meat.