Every day, new products are identified as containing harmful chemicals, from food and personal care products to the clothes we wear. One class of chemicals, known as per- and polyfluoroalkyl substances (PFAS), is particularly concerning due to its persistence in the environment and the human body. Often referred to as “forever chemicals,” PFAS do not break down easily, allowing them to accumulate over time. These substances are found in water, soil, air, and even the bloodstream of humans.
Now, a new study reveals that smartwatch bands—worn by millions of people daily—may contain these potentially harmful chemicals.
Study Finds High Levels of PFAS in Smartwatch Bands
Research conducted by scientists at the University of Notre Dame examined 22 smartwatch bands and found that 15 contained high levels of fluorine, a strong indicator of PFAS contamination. The findings raise concerns, as studies show that approximately one in five people wear a smartwatch regularly.
PFAS are commonly used in products to provide resistance to water, oil, and heat. Fluoroelastomers, a type of synthetic rubber, are often found in smartwatch bands because of their durability and resistance to sweat. However, researchers warn that prolonged skin exposure to these chemicals could pose health risks.
Dr. Oddný Ragnarsdóttir, a scientist studying chemical absorption through the skin, explains the potential dangers. “We cannot say with 100 percent certainty that PFAS will enter the bloodstream, but they have managed to penetrate the skin—which is the first step in the process of dermal absorption,” she states.
Although the skin is a strong protective barrier, heat and sweat can increase the likelihood of absorption. This means people who wear their smartwatch bands for long periods—especially while exercising—may experience greater exposure.
Potential Health Risks of PFAS Exposure
The Environmental Protection Agency (EPA) has warned that certain levels of PFAS exposure have been linked to serious health issues, including:
- Decreased fertility and developmental effects in children
- Increased risk of prostate and kidney cancer
- Weakened immune response, including a reduced ability to fight infections and lowered vaccine effectiveness
One of the biggest challenges in studying PFAS is the sheer number of different compounds in use and how they evolve over time. As manufacturers adjust their chemical formulas, it becomes harder for researchers to track their long-term effects on human health.
How Are Consumers Reacting?
Given the potential risks, how are smartwatch users responding?
Many students we spoke to said they were not overly concerned about the findings. Some had already switched to metal watchbands, while others preferred rubber bands for comfort and durability. One student noted, “I wear my watch every day, but the risk doesn’t bother me.”
Despite the mixed reactions, awareness of PFAS in consumer products is growing. Recent efforts by the federal government aim to limit the use of these chemicals in manufacturing, but many products containing PFAS are still available on the market.
How to Reduce Your Risk
If you’re concerned about potential exposure to PFAS from your smartwatch band, here are a few steps you can take:
✔️ Research materials before purchasing. Brands like Apple, Nike, and Fitbit use fluoroelastomers in their watchbands. Consider switching to metal, fabric, or untreated leather bands if you want to minimize exposure.
✔️ Check for regulatory updates. The Consumer Product Safety Commission (CPSC) provides information on hazardous chemicals in everyday items. Visit CPSC.gov to learn more.
✔️ Limit prolonged contact. If you prefer to keep using a synthetic band, consider removing it occasionally to reduce extended skin exposure, especially after sweating.
The Bottom Line
While research on PFAS absorption through the skin is still ongoing, the presence of these chemicals in everyday items—including smartwatch bands—is raising concerns among scientists. Although regulatory efforts are underway, consumer awareness remains the best defense against potential exposure.
For those looking to minimize risks, switching to alternative watchband materials and staying informed about evolving regulations may be the safest approach.
