Sodium metabisulfite is harmful to people if consumed. Sodium metabisulfite is a food additive used as a preservative, bleaching agent and filler in food processing. When used as a bleaching agent, it is only used for fumigation, not for soaking, etc. If it comes into direct contact with the item, it will cause the item to discolor. Sodium metabisulfite should not be eaten, and eating it will have certain effects on the human body, causing liver damage and even death in serious cases. In daily life, buyers can make a simple judgment from the color and smell of food. In food, you can see whether the color of the skin is too bright, and if it is bright, you can smell it again to see if there is any irritating smell. If it is a fruit, you can peel the skin and smell it, if there is a pungent odor, generally may be soaked in medicine. Daily use of sodium metabisulfite should be standardized, if the body appears abnormal, go to the hospital in time for examination and treatment under the guidance of the doctor.