Recent investigations have revealed that smartwatch and fitness tracker bands may not be as safe as they appear. Researchers discovered that many of these bands harbor PFAS, a class of persistent chemicals known colloquially as “forever chemicals.” These compounds do not decompose easily, and they have been associated with a range of health complications. Considering that some individuals wear these devices constantly, it’s important to ponder—what exactly is in these wristbands?
Key insights from the research
As reported in the Journal Environmental Science & Technology Letters, investigators from the University of Notre Dame and the American Chemical Society (ACS) examined 22 wristbands from major brands including Apple, Fitbit, Google, and Samsung. They sought fluorine, which indicates the presence of PFAS. As expected, all 13 wristbands marketed as being constructed from fluoroelastomers—a category of synthetic rubber—were found to contain fluorine. However, it was more unexpected that two of the nine bands not identified as fluoroelastomer also tested positive. This prompts concerns about the undisclosed presence of PFAS in products lacking clear designation.
The PFAS they discovered most frequently was PFHxA. It appeared in nine wristbands, with a median concentration of 800 parts per billion (ppb). In one instance, a sample exceeded 16,000 ppb—an alarming figure for an item worn against your skin daily.
Price also played a role. Bands priced over $30 had higher fluorine concentrations compared to those costing less than $15. These more expensive bands, often noted for their resilience and attractive design, might come with an unseen chemical burden.
Furthermore, the research does not explicitly name the brands with hazardous wristbands, which would have been beneficial to know. However, it is a substance frequently found in smartwatch straps, especially those designed for sports.
Is there cause for concern?
PFAS are utilized in a variety of products due to their resistance to water, perspiration, and oil. This is why they are favored in non-stick cookware and waterproof clothing. In smartwatch bands, they contribute to keeping the material robust, clean, and stain-free. Although it’s a logical choice for manufacturers, it may not be as beneficial for the wearer.
The issue with PFAS is their persistence. They do not degrade easily, either environmentally or within our bodies. Over time, exposure can lead to adverse effects, even when initially the exposure appears minimal.
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PFAS have been associated with health complications such as thyroid disorders, liver damage, and even specific cancers. Researchers are still determining how much PFAS from wristbands can penetrate the skin. Studies indicate that some PFAS may indeed permeate human skin under typical conditions. If you are wearing your smartwatch all day, every day, it’s prudent to consider what is coming into contact with your skin.
What actions can you take?
If this information has you reconsidering your wristband, think about switching to a silicone band. Silicone typically contains fewer chemicals such as PFAS. Scrutinize product specifications, and if an item is marketed as fluoroelastomer, it might be wise to contemplate avoiding it. There’s no need to completely abandon your smartwatch—just be a bit more discerning about the accessories you select.
While the issue of toxic wristbands is concerning, what’s happening inside your body could be even more significant. Studies indicate that we are ingesting PFAS and microplastics from sources like bottled water and food packaging. These plastics can persist within the body, leading to harm over time. Therefore, while it’s advantageous to monitor wearable technology, reducing plastic use—especially single-use bottles—may provide even greater benefits for your health.
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