Tashkent, Uzbekistan (UzDaily.com) — Watch straps from several popular fitness tracker and smartwatch brands have been found to contain dangerous chemicals known as PFAS, or "forever chemicals." These substances are nearly non-biodegradable, posing risks to both the environment and human health, according to researchers from the University of Notre Dame (USA).

The study tested 22 watch straps from brands including Apple, Google, Fitbit, Samsung, and others, analyzing them for 20 different compounds. The straps, which spanned a range of price categories, revealed that many were made using fluoroelastomer—a synthetic polymer that enhances rubber’s resistance to sweat, skin oils, and lotions. Of the tested samples, nine contained high levels of perfluorohexanoic acid (PFHxA), with some exceeding 1,000 parts per billion, far above the typical standards for PFAS in consumer products.

PFAS, a group of synthetic substances first used in the 1950s, are known for their almost indestructible chemical structure, which prevents them from breaking down and allows them to persist in the environment for decades. They contaminate soil and groundwater, earning the nickname "forever chemicals." These substances are commonly used to make products water-, heat-, and stain-resistant, appearing in items such as clothing, food packaging, umbrellas, non-stick cookware, cosmetics, and shampoos.

The health risks associated with PFAS exposure are significant. Long-term accumulation in the body has been linked to thyroid and liver diseases, infertility, and cancer. The chemicals can transfer from treated surfaces to the skin, air, or dust and enter the body through pores or inhalation. The concern is particularly acute for smartwatch users, who, according to the study, wear these devices on their wrists an average of 11 hours per day.

This research highlights the urgent need for stricter regulations and safer alternatives in the production of wearable technology accessories.