Why Microplastics Are Emerging As The Gut’s Newest And Most Invisible Threat

Last Updated:September 13, 2025, 13:22 IST

Microplastics, fragments smaller than five millimeters, are now found in food, drinking water, and even human tissue. This puts an increased strain on the gastrointestinal tract.

Microplastics may disrupt gut health and overall body systems.

Plastic was once celebrated as the ultimate modern convenience. Today, it is infiltrating places it was never meant to go – our bodies. Microplastics, fragments smaller than five millimetres, are now turning up in food, drinking water, and even human tissue. Scientists estimate that an average person may unknowingly consume about five grams of plastic every week, which is roughly the weight of a credit card. That is not just unsettling trivia; it’s a signal that our daily choices and industrial systems have made plastic a hidden part of our diet.

How Microplastics Sneak Onto Our Plates

“The average person consumes thousands of microplastic particles each year, placing the gastrointestinal tract under increasing strain,” explains Dr. Neeraj Goel, Director & Senior Consultant – GI Oncology, GI & HPB Surgery, Dharamshila Narayana Superspeciality Hospital, Delhi. Seafood harvested from polluted oceans, bottled water marketed as pure, and even fruits and vegetables irrigated with contaminated water are all carriers of these invisible particles.

Everyday actions like reheating leftovers in plastic containers or sipping tea from plastic-lined cups only add to this hidden intake. “Seafood, table salt, bottled water and packaged food have all been found to contain microplastic residues. Even reheating food in plastic containers can release fragments that are unknowingly ingested,” adds Dr. Goel.

Why the Gut Takes the Hit

The gut is not just a digestive tube; it is a living ecosystem of microbes that calibrate immunity, metabolism and mood. “Microplastics may erode this delicate balance, Laboratory studies suggest irritation of the gut lining, shifts in microbial diversity and altered nutrient absorption,” warns Dr. Sukrit Singh Sethi, Director & Senior Consultant – Gastroenterology, Hepatology and Liver Transplantation, Narayana Hospital, Gurugram.

The concern is not sudden poisoning but long-term disruption. Low-grade inflammation, nutrient malabsorption, and microbial imbalance (known as dysbiosis) are all possible outcomes. “Research has suggested links between microplastic exposure and conditions such as irritable bowel syndrome and inflammatory bowel disease,” says Dr. Goel.

Beyond the Gut: A Wider Threat

The risks don’t stop at digestion. “Microplastics can act as carriers of harmful substances including phthalates, bisphenols and heavy metals,” explains Dr. Goel. Once these particles cross the gut barrier, they can enter the bloodstream and circulate throughout the body, potentially impacting the cardiovascular, endocrine and immune systems. While large-scale human studies remain limited, the early evidence is clear: microplastics are not inert bystanders.

What We Can Do

The problem is global, but small steps make a difference. “Drink from glass or stainless-steel bottles, reheat meals in ceramic or steel instead of plastic, and favour unpackaged produce,” advises Dr. Sethi. Dr. Goel adds, “Choosing filtered or boiled water instead of bottled water and avoiding microwaving in plastic containers are simple but effective measures.” Collectively, such habits reduce personal exposure while signalling demand for sustainable packaging.

The silent accumulation of microplastics in our bodies is more than a medical curiosity; it is a slow-moving public health challenge. The gut may be the first organ to register this invasion, but the responsibility to act extends far beyond it.

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Author: News18