It is harmful. Sour plum powder contains a lot of acidic components. Excessive consumption or inhalation will lead to hyperacidity, which is easy to cause nausea and acid reflux. In severe cases, it will also damage the human gastric mucosa, causing a high incidence of gastric ulcers. Sour plum powder is a healthy food that can lose weight. It can not only accelerate the burning and metabolism of fat in human body, but also help people lose weight.