The outer skin of raw cashews is not edible, but the skin of cashews that have been sautéed can be eaten directly. Fully ripe cashew nut skin is edible. There are no toxins in the sautéed cashew nut skin. Cashew nut skin contains fiber and calcium and other trace elements. Proper consumption can supplement the body’s nutritional elements. It is important to note that the raw cashew nut skin can not be eaten, because the raw cashew nut carries a certain amount of lacquer phenol, which has a certain degree of toxicity, and will affect the health of the body after eating. Lac phenol can irritate the skin, causing redness and pain. Lac phenol may also cause tongue tingling and abdominal pain. The skin of cooked cashew nuts has been treated and is not toxic and can be eaten. However, the skin of cashew nuts is hard and too much of it can cause damage to teeth and burden the stomach and intestines, leading to abdominal pain. Therefore, people with bad teeth and poor gastrointestinal function should not eat cashew skin. People who are allergic to cashew nuts should not eat the skin.