A study conducted by the American scientific journal Environmental Science & Technology Letters shows that several smartwatches and smartbands sold worldwide have a high concentration of eternal chemicals — or FPAS. In short, these chemicals are given this name precisely because they are resistant to time and deterioration and can be highly harmful to health.

The research analyzed several smartwatches, from various categories and price ranges, but the common denominator among them was the material used in the strap, the fluoroelastomer — the famous silicone strap that accompanies most wearables sold today.

According to the researchers, a high level of perfluorohexanoic acid (PFHxA) was found in 22 straps from different brands analyzed. According to them, this chemical can be easily absorbed by the skin. This can also be potentially aggravated by the fact that these straps are recommended for physical activities, since sweat can facilitate the absorption of the elements.

The researchers did not reveal which brands of smartwatches the eternal chemicals were found in, but they did point out that they could be present in any strap made with fluoroelastomer. This type of material is commonly used by popular brands such as Samsung, Apple, Amazfit, Huawei and Google.

It is important to note that, despite being potentially harmful to health — FPAS can increase the risk of cancer, in addition to being linked to cases of high cholesterol — there is still much research to be done on the subject. In any case, if possible, it is worth avoiding the use of this type of material.

Most manufacturers — such as Samsung and Apple — already offer additional straps made with other materials, such as Fabric Nylon, which are also recommended for sports and do not pose any risk of contamination by FPAS.