Does Artificial Turf Cause Inflammation? What the Science Actually Says

Longevity biohacker Bryan Johnson recently put artificial turf on the map as a hidden health concern — and the question is fair: can the synthetic grass under our feet quietly fuel inflammation? The honest answer is nuanced. There is no large study proving that artificial turf directly inflames the body. But the materials it sheds — PFAS, microplastics and recycled tyre rubber — are individually linked, in Tier-1 research, to immune disruption and inflammatory signalling. This article separates what is established from what is still being investigated.

What artificial turf is actually made of

Synthetic turf is plastic grass blades stitched into a backing, usually filled with 'crumb rubber' — granules made from shredded end-of-life tyres. According to the Mount Sinai Institute for Exposomic Research, this combination introduces several compounds of concern into a surface children play on directly.

The inflammation and immune connection

Here is where the evidence is strongest — not on turf itself, but on the compounds it releases. PFAS are well-documented immune disruptors: in a landmark JAMA study, higher childhood PFAS exposure was associated with a roughly 40% drop in diphtheria antibody levels, evidence that these chemicals blunt the immune response. Microplastics, once dismissed as an external pollution problem, are now known to reach the bloodstream: a 2022 study quantified plastic particles in the blood of healthy adults for the first time. Particles that circulate in blood and lodge in tissue are a plausible trigger for low-grade inflammatory responses, which is why this is an area of intense research.

What the evidence really says (and doesn't)

Being precise matters. The link between artificial turf and chronic inflammation in humans is biologically plausible and supported by what we know about its components — but direct epidemiological studies on turf exposure are still scarce. Regulators, however, are not waiting for certainty: in 2023 the European Union classified the rubber granule infill in artificial turf as an intentionally-added microplastic and moved to ban it, a restriction projected to prevent hundreds of kilotonnes of microplastic release. And 6PPD-quinone, a breakdown product of tyre rubber, was shown in Science to cause acute mortality in coho salmon — its effects on humans are now an open research question, not a settled fact.

Why children are most exposed

Mount Sinai flags children as the highest-risk group: they breathe faster, put hands to mouth more often, are more susceptible to the heat that synthetic turf radiates, and have immature detoxification systems. For surfaces where kids play, the institute recommends natural grass as the safest option.

How to lower your exposure

Key takeaways