Microplastics and Health

How plastic breaks into tiny particles now found in water, food, air and human bodies, what scientists know about health effects, and why uncertainty complicates policy.

Microplastics are plastic particles smaller than 5 millimetres.

Sources

Larger plastic breaking down.
Synthetic clothes shedding fibres in washing.
Tyre wear.
Microbeads in cosmetics (banned in some countries).

Where found

Oceans, rivers and soil.
Drinking water and bottled water.
Food like seafood and salt.
Air.
Human blood, lungs and placentas, according to recent studies.

Health effects

Scientists are still studying effects.
Some research links microplastics to inflammation and heart risks, but evidence is still developing.

Policy challenge

Uncertainty about harm makes policy difficult.
The precautionary principle suggests reducing exposure while research continues.

Indian research

Studies have found microplastics in Indian salt and sugar brands, raising concerns.

The salt study

A 2024 study reported microplastics in several salt and sugar brands sold in India, prompting calls for more research.

Thinking microplastics are only an ocean problem

They're found in food, water, air and human bodies.

Key takeaways

Microplastics are particles under 5 millimetres.
They come from breakdown, clothes, tyres and cosmetics.
They're found in food, water and human bodies.
Health effects are still being studied.