Forever Chemicals in Fitness Trackers: New Study Raises Concerns

A recent study published in Environmental Science & Technology Letters has uncovered alarming levels of "forever chemicals" in certain pricier smartwatch wristbands. Researchers discovered that wristbands made from fluorinated synthetic rubber, particularly those priced over $30, contain significant amounts of perfluorohexanoic acid (PFHxA), a harmful type of per- and polyfluoroalkyl (PFAS) substance . These chemicals are notorious for their persistence in both the human body and the environment, with some studies linking them to serious health risks, including cancer.

The research involved screening 22 smartwatch wristbands from various brands and price ranges. Findings revealed that all 13 wristbands marketed as containing fluoroelastomers exhibited detectable levels of fluorine, indicating the presence of PFAS. PFHxA emerged as the most prevalent compound, with concentrations reaching as high as 16,000 parts per billion (ppb) in some samples—significantly higher than PFAS levels found in previous studies on cosmetics. This raises concerns about the safety of wearing these fitness tracker wristbands for extended periods.

While the exact health implications of PFHxA absorption through skin contact remain unclear, researchers recommend consumers consider lower-cost wristbands made from silicone as a safer alternative. For those who prefer higher-priced options, it is crucial to read product descriptions carefully and avoid any wristbands listed as containing fluoroelastomers.

For further reading, please click here.