A viral plastic-wrapped eating trend in China is raising serious health concerns

A new weight-loss trend spreading on Chinese social media has startled doctors not because it is extreme, but because of how casually it is being promoted. The practice, often called “plastic-wrapped eating”, involves people tightly covering their mouths with plastic wrap, chewing food for flavour, and then spitting it out instead of swallowing. The claim is that this fools the brain into feeling full while avoiding calories.

There is no medical evidence that it works. There is plenty of evidence that it could cause harm.

Videos circulating widely in China show young people methodically wrapping cling film across their lips before eating sweets, rice, noodles, or snacks. The tone is often playful or aspirational, with creators framing the act as discipline, self-control, or a clever hack for staying thin in a calorie-obsessed online culture.

From a biological perspective, the idea falls apart quickly. Satiety is not triggered by chewing alone. The body relies on digestion, nutrient absorption, and gut hormones to signal fullness. Taste without intake does not activate those systems in any lasting way. At best, the effect is temporary. At worst, it leaves people hungrier and more likely to binge later.

Doctors are far more concerned about the risks people seem to be ignoring. Plastic wrap is not designed to be held against the mouth while eating. Small particles can be inhaled or transferred into saliva, adding to microplastic exposure. Researchers are already investigating links between microplastics and inflammation, hormonal disruption, and metabolic effects. Intentionally pressing plastic into the mouth only increases that exposure.

There is also a basic safety issue. Eating while airflow is restricted raises the risk of choking or breathing difficulty, especially if someone coughs, laughs, or panics. Even brief obstruction can be dangerous.

Mental health professionals see another red flag. Chewing food and spitting it out closely mirrors behaviours seen in eating disorders, particularly binge-and-purge patterns. While this method avoids vomiting, it still reinforces the same cycle of craving, guilt, and punishment. Over time, that can deepen anxiety around eating and normalise disordered habits.

What troubles experts most is how lightly the trend is being treated. Many videos present it as harmless experimentation, not as a behaviour with real

consequences. That matters because young audiences are often the most exposed and the most vulnerable to extreme diet messaging.

Public health specialists in China have already warned that viral diet hacks like this thrive in online spaces where shock value spreads faster than evidence. The stranger the method looks, the more attention it attracts. Platforms reward novelty, not safety.

There is nothing new or clever about chewing food and not eating it. The risks, however, are very real. Sustainable weight management has never involved plastic, deprivation, or tricking the body. It involves consistency, adequate nutrition, and addressing why food feels like an enemy in the first place.

The plastic-wrapped eating trend is less about health and more about desperation disguised as discipline. That is what worries doctors most.