A new study has found high levels of toxic chemicals in smartwatch bands from major brands like Apple, Google, and Samsung. The independent research group analyzed various bands and found some contain chemicals that could cause skin irritation, hormonal disruption, and other health problems. The chemicals, called fluoroelastomers, contain large amounts of perfluorohexanoic acid (PFHxA).
PFHxA belongs to a group of industrial products called per and polyfluoroalkyl substances (PFAS), also known as “forever chemicals.” They do not break down easily and have been linked to serious health issues. Lead author Graham F. Peaslee, a physicist at the University of Notre Dame, said the researchers were surprised to find such high concentrations of PFHxA in the watch bands.
“This was unique in the sense that it was the first time we had found only one PFAS, and that it was at such high concentrations — much higher than we typically find in consumer products,” Peaslee said. The study examined 22 smartwatch bands across different brands and prices. Bands costing over $30 had more fluorine than those under $15.
PFHxA was the most common PFAS found, appearing in 9 of the 22 samples.
High chemical levels in smartwatch bands
The median concentration was about 800 parts per billion, with one exceeding 16,000 parts per billion.
“We have never seen extractable concentrations in the part-per-million range (greater than 1000 parts per billion) for any wearable consumer product applied to the skin,” Peaslee noted. The scientists warn that the high PFAS levels in these products could lead to significant skin exposure and absorption. Many of the bands were marketed for sports and fitness, meaning wearers may be exercising and sweating with them on.
This could increase chemical contact with open skin pores. However, Peaslee pointed out that PFAS-free watch band options are available. “The good news is that the consumer can opt for alternative wrist bands to avoid potential PFAS exposure risks,” he said.
Study co-author Alyssa Wicks advises consumers to consider less expensive silicone bands and be wary of pricier options that may contain fluoroelastomers. Experts recommend caution and checking materials when buying wearable tech. They also urge manufacturers to address these safety concerns for the well-being of users.
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