Microplastics at Home: What the Science Says and 15 Ways to Reduce Your Exposure

They're in the ocean, in the air, in our food and water. Over the past few years, scientists have also found them in human blood, lungs, placentas, arteries and even the brain. Microplastics have gone from an ocean pollution story to one of the biggest personal health questions of our time. The Global Wellness Institute even launched a dedicated "Microplastics Watch" initiative to track the issue in 2026.

It's easy to feel overwhelmed. Plastic is everywhere, and you can't avoid it completely. But here's the encouraging part: some of the biggest sources of exposure are inside our own homes, which means there's a lot you can do. Let's look at what science knows, what it doesn't, and practical ways to cut back without panic.

What are microplastics and nanoplastics?

• Microplastics are tiny plastic pieces smaller than 5 millimeters, about the size of a sesame seed or smaller.
• Nanoplastics are even smaller, less than 1 micrometer, far too small to see. Because they're so tiny, they may be able to pass into cells and tissues more easily.

They come from larger plastics breaking down over time through sunlight, heat, friction and wear, and from products that shed fibers and fragments, like synthetic clothing, tires and packaging.

Where do microplastics come from in your home?

Household dust

Studies have found that indoor dust can be a major source of microplastic exposure, much of it from synthetic textiles: carpets, upholstery, clothing, curtains and bedding. We breathe it in and swallow it.

Bottled water

In a 2024 study published in PNAS, researchers at Columbia University used a new imaging technique to analyze bottled water. They found an average of about 240,000 detectable plastic fragments per liter, around 90% of them nanoplastics. Earlier methods had missed most of these tiny particles.

Heating food in plastic

Heat speeds up the release of particles. A 2023 study in Environmental Science & Technology found that microwaving food in some plastic containers released millions of microplastics and billions of nanoplastics from each square centimeter of plastic in just three minutes.

Plastic tea bags

A 2019 study at McGill University found that steeping a single plastic tea bag at brewing temperature released billions of microplastic and nanoplastic particles into the cup.

Baby bottles

A 2020 study in Nature Food found that polypropylene baby bottles released millions of microplastic particles per liter when prepared with hot water, especially when sterilized and shaken.

Plastic cutting boards

Chopping on plastic boards can shed particles into food, according to a 2023 study.

Synthetic clothing and laundry

Washing polyester, nylon and acrylic clothing releases microfibers into water and air.

Food and drink

Microplastics have been found in seafood, salt, tea, beer, honey and many other foods, often from packaging and processing.

Microplastics in the human body: what research has found

In arteries

In a striking 2024 study published in the New England Journal of Medicine, researchers in Italy examined plaque removed from the carotid arteries of about 250 patients. Plastic particles were found in the plaque of more than half of them. Over about three years of follow-up, patients with plastics in their plaque had about four and a half times the risk of heart attack, stroke or death compared with those without. It was an observational study and can't prove plastics caused the harm, but it caught scientists' attention.

In the brain

A 2025 study in Nature Medicine analyzed human tissue samples and reported finding microplastics in brain tissue, at higher concentrations than in liver and kidney samples, and at higher levels in samples from 2024 than from 2016. The research is new and methods are still being refined, but it raised big questions.

Elsewhere

Microplastics have also been detected in blood, lungs, placentas, breast milk and testicular tissue.

Are microplastics harmful to your health?

This is the honest answer: scientists don't know yet. The World Health Organization has said there isn't enough evidence to determine the health risks of microplastics in drinking water and has called for more research. Measuring microplastics accurately in the human body is technically very difficult, and standard methods are still being developed.

Researchers are investigating possible links with:

• Inflammation and oxidative stress
• Heart and blood vessel disease
• Hormone disruption, partly from chemicals in plastics such as some bisphenols and phthalates
• Gut and immune effects

Lab and animal studies raise concerns, and human studies like the arterial plaque study are worrying. But much of the research is early. The sensible approach is reasonable caution, not panic: reduce exposure where it's easy, especially for children and during pregnancy, while science catches up.

15 ways to reduce microplastic exposure at home

In the kitchen

1. Don't microwave food in plastic. Use glass or ceramic containers instead, even if the plastic says "microwave safe."
2. Don't put hot food or drinks in plastic containers. Let food cool first, or store it in glass.
3. Hand wash plastic containers instead of putting them in the dishwasher, where heat can break them down. Replace scratched or worn plastic.
4. Switch to glass, stainless steel or ceramic for food storage, a little at a time as old containers wear out.
5. Choose wood or bamboo cutting boards over plastic.
6. Use loose-leaf tea or paper tea bags instead of plastic mesh "silken" bags.
7. Cut back on ultra-processed and heavily packaged foods. Fresh, whole foods have less packaging contact.

For drinking water

1. Drink filtered tap water instead of bottled water where tap water is safe. Certain filters, including reverse osmosis and some carbon block filters, can reduce microplastics. Look for certification to standards like NSF/ANSI 401 or 53 for the contaminants you care about.
2. Use a glass or stainless steel water bottle, and don't leave plastic bottles in hot cars.

Around the house

1. Vacuum regularly with a HEPA filter vacuum. Dust is a major source.
2. Dust with a damp cloth rather than a dry duster, which spreads particles into the air.
3. Ventilate. Open windows when outdoor air is clean, and consider a HEPA air purifier, which can capture airborne particles. See how to make your home healthier.
4. Choose natural fibers like cotton, wool, linen and hemp for clothing, bedding and rugs when you can.

In the laundry

1. Wash full loads in cold water, on shorter cycles, and air-dry when possible. Some people use microfiber-catching laundry bags or filters.

For babies and kids

1. Prepare formula in glass bottles, let boiled water cool before mixing it in plastic, and avoid heating food in plastic for little ones.

Don't let perfect be the enemy of good

You can't eliminate microplastics entirely. They're in the air outdoors too. Throwing out every plastic item at once creates its own waste. Focus on the biggest, easiest wins: don't heat food in plastic, filter your water, vacuum and dust well and replace worn containers over time.

Watch out for microplastic marketing

As concern grows, so does marketing. Be cautious about:

• "Microplastic detox" supplements and cleanses. There's no evidence they remove microplastics from your body.
• Expensive home testing kits for microplastics in your body. Measuring them accurately is very difficult even for specialized labs.
• Water filters with vague claims. Look for independent certification rather than marketing language.
• Products labeled "plastic-free" that still use plastic linings or coatings.

The proven basics, like not heating food in plastic, filtering water, ventilating and keeping dust down, cost little and make a real difference.

Microplastics and the planet

Every bit of plastic you avoid also helps the environment. Plastic production and waste are linked with climate change, ocean pollution and harm to wildlife. Reusable bags, bottles and containers, buying less, choosing products with less packaging and recycling properly all help. See our guide to reducing food waste for more planet-friendly kitchen habits.

Frequently asked questions about microplastics

Can you get microplastics out of your body?

There's no proven way to "detox" microplastics, and you should be wary of products that claim to. The body may clear some particles naturally. The best approach is reducing exposure.

Is bottled water worse than tap water for microplastics?

Studies generally find higher levels in bottled water. Filtered tap water is usually a better choice where tap water is safe.

Are glass and stainless steel really better?

For storing and heating food, yes. They don't shed plastic particles, they last for years and they're easy to clean.

Do water filter pitchers remove microplastics?

Some do, depending on the filter type. Check for independent certification and replace cartridges on schedule. Reverse osmosis systems generally remove the smallest particles most effectively.

Are "BPA-free" plastics safe?

They're free of one chemical, BPA, but may contain related chemicals, and they can still shed microplastics. Heat is the main thing to avoid.

Your surroundings shape your health. See how your environmental wellness compares to the other seven dimensions with our free wellness wheel quiz.