Microplastics contaminating food and drinks may be fueling a dramatic rise in bowel diseases

NANJING, China — Microplastics may be the reason some people are more likely to develop inflammatory bowel disease, a new study warns. Researchers at Nanjing Medical University found higher quantities of these microscopic plastic particles in the feces of people with IBD than in their healthy peers.

The study notes that people regularly ingest these particles through contaminated drinking water or by eating foods (like fish) which consume them first.

“Human ingestion of microplastics (MPs) is inevitable due to the ubiquity of MPs in various foods and drinking water. Whether the ingestion of MPs poses a substantial risk to human health is far from understood,” researchers write in the journal Environmental Science & Technology.

The team suggests that exposure to microplastics may be the actual reason people develop IBD. Another possibility is the condition exacerbates the retention of MPs.

According to the CDC, around three million people in the United States have IBD, an umbrella term that includes Crohn’s disease and ulcerative colitis. Symptoms include crippling stomach pain, fatigue, flatulence, nausea, backache, and problems going to the bathroom.

Cases of IBD are increasing worldwide, affecting up to one in 10 people across the globe. Women are 50 percent more prone to developing IBD than men.

“Microplastics — tiny pieces of plastic less than 5 mm in length — are everywhere, from bottled water to food to air,” the team says in a media release.

Thousands of particles in your food?

Researchers found higher numbers of microplastics of various shapes, such as sheets (left) and fibers (right) in the feces of people with IBD than in healthy controls.
(Credit: Adapted from Environmental Science & Technology 2021)

Estimates show some people may consume up to tens of thousands of microplastics each year. Their overall health consequences are generally unknown. The study finds the worse a person’s symptoms were, the more they had in their feces.

“The fragments could be related to the disease process… Characterized by chronic inflammation of the digestive tract, IBD can be triggered or made worse by diet and environmental factors,” the study authors explain.

The findings come from samples from 102 people across China, with half receiving an IBD diagnosis before the study. Analysis showed stools from the IBD patients contained about 50 percent more microplastics per gram. The shapes – mostly sheets and fibers – were similar in both groups, but the IBD feces had more smaller particles.


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