Picture this: you run your plastic lunch containers through the dishwasher and use them again the next day without a second thought. Completely ordinary, and yet with each use, something invisible may be quietly making its way into your meal. Microplastics are tiny plastic particles that find their way into food, water and air without announcing themselves. The reassuring part is that once you know where to look, there is a great deal you can do.
What it is and how to recognize it
Microplastics are solid plastic particles smaller than 5 millimetres. They come in two forms: primary microplastics, which are intentionally manufactured at a small size (such as microbeads in cosmetics or synthetic fibres in clothing), and secondary microplastics, which form when larger plastic objects break down under sunlight, heat and mechanical wear. They belong to the family of synthetic polymers and serve various functions in products: as exfoliants, carriers for active ingredients, thickeners or textile fibres.
Also known as / found on labels as: polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), nylon, polyester, acrylate, polymethyl methacrylate (PMMA), carbomer, acrylates copolymer, polyquaternium, microbeads, plastic microbeads, synthetic polymer
Where it hides
- Cosmetics and personal care – facial scrubs, toothpastes, shower gels, finely textured foundations, mascaras
- Synthetic textiles – fleece jumpers, polyester sportswear, nylon tights; microplastics are released with every wash cycle
- Plastic food containers – plastic bottles, cups, lunch boxes, particularly when heated or physically damaged
- Bottled water – both plastic bottles and carton-style packaging can release microscopic particles into the liquid
- Tea bags – some bags are made from nylon or polyester and release fibres when steeped in hot water
- Seafood and fish – aquatic organisms absorb microplastics from their environment and store them in their tissues
- Indoor dust – synthetic carpets, upholstery and plastic surfaces gradually shed particles that float through the air we breathe
What it does in the body
Microplastics enter the body through three main routes: ingestion (food and water), inhalation (indoor and outdoor air), and to a lesser extent through the skin during contact with cosmetic products. The smallest particles, known as nanoplastics, are capable of crossing cell membranes.
- Digestive system: microplastics can irritate the gut lining and disturb the balance of the intestinal microbiome
- Respiratory system: inhaled fibres can settle in lung tissue and contribute to chronic low-level irritation
- Hormonal system: plastics frequently contain added chemicals such as plasticisers and stabilisers that can act as endocrine disruptors, mimicking or blocking hormones
- Cardiovascular system: the smallest particles may enter the bloodstream and accumulate in tissues
- Inflammatory response: the body recognises plastic particles as foreign bodies and may respond with chronic low-grade inflammation
- Vulnerable groups: children and pregnant women are more sensitive, as developing organisms are more susceptible to foreign substances
How to reduce exposure
- Switch to glass, stainless steel or ceramic containers for food and drinks, especially for anything hot
- Check cosmetic ingredient lists and avoid products listing polyethylene, polypropylene or acrylates copolymer; look for certifications such as COSMOS Organic or Zero Plastic Inside
- Use a laundry bag designed for synthetic fabrics (such as a Guppyfriend bag) to capture microfibres during washing
- Filter your drinking water with a quality activated carbon or reverse osmosis filter, which can capture very small particles
- Ventilate your home regularly and vacuum with a HEPA filter to reduce the concentration of microplastics in household dust
- Choose paper tea bags or loose-leaf tea, and favour foods packaged in paper, glass or metal over plastic
Supporting your body's natural elimination
- Stay well hydrated – the kidneys are a primary route for eliminating small foreign particles, and good hydration supports their work
- Eat fibre-rich foods – legumes, wholegrains and vegetables support regular bowel movement, reducing the time microplastics spend in contact with the gut lining
- Move outdoors in nature – regular physical activity supports the lymphatic system and the body's overall capacity to process foreign substances
- Support your gut microbiome – fermented foods such as kefir, sauerkraut and natural yoghurt help maintain a resilient gut barrier against foreign substances
Microplastics are part of the world we live in, and avoiding them entirely is not realistic. But every small, considered choice adds up to less burden on your body and less plastic in the environment around you. The steps you take today quietly build into a way of living you can feel good about.
