New research uncovers alarming levels of PFAS toxins in fluoroelastomer wristbands, raising concerns about long-term exposure through the skin

A recent study published in Environmental Science & Technology Letters has raised serious health concerns for smart watch and fitness tracker users. Researchers have discovered that wristbands made from fluoroelastomers — a material commonly used in wearable tech — may contain high concentrations of perfluorooctanoic acid (PFHxA), a toxic “forever chemical” that could seep through the skin.

PFHxA is part of a broader class of industrial chemicals known as per and polyfluoroalkyl substances (PFAS). Dubbed “forever chemicals” due to their resistance to degradation, PFAS have been linked to severe health conditions, including cancer, infertility, and high blood pressure. Despite these dangers, PFAS are widely used in everyday products such as non-stick cookware, waterproof fabrics, and cosmetics.

Lead author Graham F. Peaslee, a physicist at the University of Notre Dame, explained that his team was surprised to find PFHxA while analyzing 22 watch bands from various brands. “We weren’t initially looking for PFHxA,” Peaslee said, “but it turned out to be the most frequently detected compound, present in alarmingly high concentrations.”

The research highlights a significant concern: these bands, especially those marketed for sports and fitness, are often in direct contact with sweaty skin. Sweat and open pores could increase the likelihood of PFAS absorption. While the study didn’t directly test human exposure, the findings suggest potential risks that warrant attention.

Experts are urging consumers to consider alternative wristband materials, such as fabric or metal, to reduce the risk of PFAS exposure. “The good news is that the consumer can opt for alternative wrist bands to avoid potential PFAS exposure risks,” Peaslee noted.

This revelation adds to the growing scrutiny surrounding PFAS in consumer products. As awareness spreads, calls for stricter regulations on these persistent pollutants are likely to intensify. For now, users may want to think twice about the materials in their wearable tech accessories.