Not "dental floss" but specifically floss which contained PFASs. Other culprits were Teflon cookware and cardboard food packaging.<p>The dental floss results are hidden in the Supplementary Information document linked in the original Nature article:
<a href="https://www.nature.com/articles/s41370-018-0109-y#MOESM1" rel="nofollow">https://www.nature.com/articles/s41370-018-0109-y#MOESM1</a><p><a href="https://static-content.springer.com/esm/art%3A10.1038%2Fs41370-018-0109-y/MediaObjects/41370_2018_109_MOESM1_ESM.docx" rel="nofollow">https://static-content.springer.com/esm/art%3A10.1038%2Fs413...</a><p>These products contained fluorine, a marker for PFASs, as determined by particle-induced γ-ray emission (PIGE) spectroscopy:<p>Colgate Total Dental Floss Mint<p>CVS Health SuperSlip Ease Between Waxed2<p>Oral-B Glide Pro-Health Mint<p>Oral-B Glide Pro-Health Original<p>Crest Glide Deep Clean Cool Mint Floss3<p>Signature Care Mint Waxed Comfort Floss2<p>These products were found not to contain any fluorine:<p>CVS Unwaxed<p>Desert Essence Tea Tree Oil Dental Tape<p>EcoDent Gentle Floss Premium Dental Floss with Essential Oils Mint Vegan Waxed<p>Johnson & Johnson Listerine Cool Mint Mint Floss<p>Johnson & Johnson Reach Clean Paste Icy Mint Woven Floss<p>Johnson & Johnson Reach Mint Waxed<p>Reach Mint Waxed<p>Reach Waxed Unflavored<p>Oral-B Complete Deep Clean Ultra Mint<p>Oral-B Satin Floss Mint<p>Rite-Aid Premium Waxed Mint Floss2<p>Tom's of Maine Naturally Waxed Antiplaque Flat Floss