Douglas Fischer

That nice waxy glide as you floss your teeth? Turns out it could be courtesy of PFAS, the “forever chemicals” that hijacks hormones and is linked to reproductive problems, birth defects, testicular cancer and a host of other diseases.

Mamavation, the wellness site, and EHN.org tested 39 different brands of floss for PFAS and found evidence of the chemical in one-third of the samples. Levels ranged from 11 parts per million, or ppm, to 248,900 ppm.

Four products had more than 70,000 ppm, or 7%, PFAS, with Oral-B Glide testing at 248,900 ppm, or nearly 25%.

“None of these contaminants are something our readers want in their products,” Mamavation founder Leah Segedie wrote.