Sports & Leisure

6PPD-quinone is a chemical formed when 6PPD (N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine) — an antioxidant preservative added to virtually all car tyres to prevent ozone cracking — reacts with atmospheric ozone…

Chemical UV filters in sunscreens are organic compounds that absorb ultraviolet radiation and convert it to heat. They are distinct from mineral UV filters (zinc oxide and titanium dioxide) which physically scatter UV…

Artificial turf systems use recycled tyre rubber ("crumb rubber") as the infill material that cushions the synthetic grass surface. This crumb rubber is a complex mixture of styrene-butadiene rubber, carbon black, PAH…

DEET (N,N-diethyl-meta-toluamide) is the most widely used active ingredient in insect repellents worldwide, effective against mosquitoes, ticks, midges, and other biting insects. It has been used since the 1940s. DEET…

Disperse dyes are a class of water-insoluble dyes designed for dyeing hydrophobic synthetic fibres including polyester, nylon, acetate, and triacetate. They are suspended rather than dissolved in the dye bath and are …

Disperse dyes are the colourants used to dye synthetic fibres including polyester, nylon, acetate, and spandex/elastane — they are called "disperse" because they are only sparingly soluble and must be applied as a fin…

Energy drinks are among the most chemically complex beverages in the food supply — combining high synthetic caffeine doses with taurine, glucuronolactone, B vitamin megadoses, artificial sweeteners, artificial colours…

Protein powders — whey, casein, soy, pea, rice, hemp, and blend formulations — are consumed daily by a large proportion of gym-going men and teenagers who use them to support muscle growth. The heavy metal contaminati…

Protein powders — whey, casein, pea, hemp, rice, and soy — are consumed daily by millions of gym-goers, athletes, and health-conscious individuals seeking to increase dietary protein. Multiple independent laboratory a…

Oxybenzone is one of the most common UV-absorbing chemicals in chemical sunscreens. It is absorbed through the skin into the bloodstream — confirmed by FDA research — and has demonstrated estrogenic activity. It is al…

Permethrin is a synthetic pyrethroid insecticide modelled on natural pyrethrins from chrysanthemum flowers. It is one of the most widely used insecticides in gardens, homes, and agriculture. Highly effective against a…

PFAS are a family of over 12,000 synthetic chemicals defined by their extremely strong carbon-fluorine bonds — the strongest in organic chemistry. This is why they do not break down: in the environment, or in the huma…

Durable water repellent (DWR) and stain-resistant finishes on everyday clothing — not just outdoor sportswear, but children's school uniforms, suit fabrics, ties, carpet-like flooring in vehicles, and seat upholstery …

Per- and polyfluoroalkyl substances (PFAS) have been used as durable water repellent (DWR) coatings on outdoor clothing, rainwear, sportswear, and equipment since the 1990s. The original long-chain PFAS (PFOA and PFOS…

Durable water repellency (DWR) coatings on waterproof jackets, hiking boots, tents, ski gear, and performance sportswear are almost universally applied using per- and polyfluoroalkyl substances (PFAS). These "forever …

Durable water repellent (DWR) treatments — sold as sprays, wash-in liquids, and factory-applied coatings for waterproof jackets, boots, tents, and outdoor gear — have historically been based on long-chain PFAS (C8 flu…

Yoga mats, exercise mats, foam rollers, resistance bands, gym flooring, and many gym accessories are made from PVC or other synthetic rubber materials requiring plasticisers. The intimate skin contact during yoga, flo…

Rubber crumb infill — made from recycled end-of-life vehicle tyres — is used as the filling between the blades of artificial turf in football pitches, playgrounds, and premium garden artificial lawns to provide cushio…

Silver nanoparticles are incorporated into sportswear, socks, workout clothing, and childrenswear under marketing claims including "antibacterial," "odour-resistant," "hygienic," and "antimicrobial." Silver ions relea…

Every wash of synthetic clothing releases hundreds of thousands of plastic microfibres into wastewater that pass through sewage treatment, accumulate in oceans, food chains, and ultimately human tissue, representing o…

Trichloramine is the compound responsible for the characteristic "pool smell" — a smell most people associate with cleanliness. It is not the smell of clean water. It is the smell of chlorine reacting with urine, swea…

The familiar "swimming pool smell" is not chlorine — it is trichloramine (nitrogen trichloride, NCl₃), a volatile chloramine formed when pool chlorine reacts with nitrogen-containing compounds in human body fluids: ur…

Trihalomethanes (THMs) are disinfection byproducts formed when chlorine used to disinfect drinking water reacts with naturally occurring organic matter (humic and fulvic acids from decaying vegetation). The four regul…