Iron stick yam skin can be eaten. But before ingesting it, you first need to make clear that your body is not allergic to the iron stick yam. Generally speaking, when you eat the yam, you can eat it directly, but when you eat the skin of the yam, the taste may be slightly worse, if the taste of the yam is more demanding, try to peel off the skin when you eat the yam. It is also important to note that you should not eat the raw yam skin, because the raw yam skin contains alkaloids, saponins and mucus proteins and other components, and may even cause stimulation of the oral mucosa, triggering discomfort in the oral cavity. If you do not want to remove the skin, before cooking should also be cleaned, to avoid unclean things on the iron stick yam, eaten after the gastrointestinal tract caused discomfort such as bloating, abdominal pain and diarrhea.