You cannot see them. You cannot taste them. But scientists estimate the average person consumes anywhere from 39,000 to 52,000 microplastic particles every year — and that number climbs higher when you factor in the air we breathe.
What Are Microplastics?
Microplastics are tiny plastic fragments smaller than 5 millimeters — some are measured in micrometers, smaller than a grain of sand. They come from two primary sources:
- Primary microplastics — intentionally manufactured at small sizes, like the microbeads once found in face scrubs and toothpastes.
- Secondary microplastics — formed when larger plastic items like bottles, bags, and clothing break down under UV exposure, heat, and physical wear.
Once released into the environment, microplastics do not disappear. They accumulate in soil, waterways, oceans, and food supplies — and ultimately, in us.
How Do Microplastics Get Into Your Body?
The entry points are everywhere and surprisingly mundane:
1. Drinking Water
A landmark study published in PLOS ONE found microplastics in 93% of bottled water tested across 11 brands and 9 countries. But tap water is not immune — microplastics have been detected in municipal water systems worldwide, including in the United States. Filtering alone does not remove nanoplastics, the even smaller fragments that pass through most conventional filters.
2. The Food You Eat
Seafood is a well-documented source — shellfish like mussels and oysters can contain thousands of microplastic particles per kilogram. But it goes far beyond seafood. Microplastics have been found in:
- Table salt (sea salt and rock salt)
- Honey and beer
- Fresh fruits and vegetables (absorbed through root systems from contaminated soil)
- Packaged and processed foods stored in plastic containers
3. The Air You Breathe
A 2019 study in Nature Geoscience found microplastics raining down from the sky in the remote Pyrenees mountains — far from any industrial source. Indoor air is often more contaminated than outdoor air, with synthetic textiles, carpets, and furniture shedding plastic fibers constantly. Studies estimate we inhale an additional 26,000 to 130,000 microplastic particles per year through air alone.
4. Plastic Packaging and Containers
Heating food in plastic containers, drinking hot liquids from plastic cups, or even drinking cold beverages from plastic bottles all accelerate the leaching of microplastic particles and chemical additives into your food and drink. Research from Environment International found that a single plastic baby bottle can shed over 16 million microplastic particles per day during normal use.
What Happens Once Microplastics Are Inside You?
This is where the science gets concerning. Researchers have found microplastics in human blood, lungs, liver, kidney, spleen — and most recently, in human breast milk, placentas, and heart tissue. A 2024 study published in the New England Journal of Medicine found microplastics and nanoplastics in arterial plaque, and people with detectable particles in their plaques had a significantly higher risk of heart attack and stroke.
Once inside the body, microplastics can:
- Trigger inflammatory responses
- Act as carriers for other environmental contaminants, including heavy metals and persistent organic pollutants
- Disrupt endocrine function (many plastics contain BPA, phthalates, and other hormone-disrupting chemicals)
- Accumulate in organs over time
The Scale of the Problem
Plastic production has grown exponentially since the 1950s. In 2020 alone, the world produced over 367 million metric tons of plastic. Less than 10% of all plastic ever produced has been recycled. The rest is in landfills, oceans, soil — and steadily breaking down into the particles that end up on your plate and in your body.
The situation will not improve soon. Plastic production is projected to double by 2040.
What You Can Do
Reducing your exposure is meaningful, even if total elimination is not currently possible:
- Switch to glass, stainless steel, or ceramic containers wherever possible
- Use a high-quality water filter certified to reduce microplastics
- Avoid heating food in plastic containers
- Reduce single-use plastic purchases
- Choose natural-fiber clothing and furnishings when possible
Beyond reducing intake, many people are also turning to targeted nutritional support to help their bodys natural systems function at their best in an increasingly contaminated world. Ingredients like zeolite, chlorella, NAC, and modified citrus pectin have attracted growing research interest for their roles in supporting cellular health, gut integrity, and natural antioxidant defenses.
The invisible threat is real. But awareness is the first step — and the steps after that are within your control.