“Eternal chemicals” refer to over 14,000 per- and polyfluoroalkyl substances (PFAS). These compounds contaminate the environment and can accumulate in the human body, negatively impacting health. Previous studies indicate that PFAS increase the risk of hormonal disorders, type 2 diabetes, obesity, and certain types of cancer. In 15,000 locations across the globe, the levels of “eternal chemicals” have exceeded dangerous thresholds, and researchers have only recently learned how to eliminate these substances, which are used in the production of cookware, feminine hygiene products, and fitness items.
Experts from the University of Notre Dame in the USA investigated whether PFAS are present in the straps of smartwatches and fitness bands from various manufacturers. The research findings were published in the scientific journal Environmental Science & Technology Letters.
The authors of the article focused on fluorine, as well as 20 specific per- and polyfluoroalkyl compounds. The team examined 22 bands from different brands and price ranges. Of the 13 that were claimed to be made from fluoroelastomers, all contained fluorine. However, this element was also found in two of the nine bands that did not include fluoroelastomers. The researchers noted that the presence of fluorine suggests the possible existence of PFAS.
Bands priced over 30 dollars contained higher levels of fluorine. In cheaper alternatives costing less than 15 dollars, lower amounts of this substance were detected. The study revealed a significantly higher concentration of fluorine than previous research.
“We have never seen concentrations exceeding 1,000 parts per billion for a consumer product intended for wear and in contact with skin,” the authors stated. According to their data, the average concentration of the most common PFAS (PFHxA) in smartwatch and fitness tracker bands is nearly 800 parts per billion, with one sample exceeding 16,000 parts per billion. In comparison, in 2023, cosmetics were found to contain an average of 200 parts per billion of “eternal chemicals.”
Researchers are still uncertain how easily PFHxA penetrates the skin and how hazardous this substance is to health. However, they hypothesized that under normal conditions, a significant amount of the “eternal chemical” could enter the human body. The authors of the article recommended choosing smartwatches and fitness trackers with inexpensive silicone bands. If one wishes to purchase a high-priced item, it is crucial to review the product description and avoid bands containing fluoroelastomers.