PFAS leave fingerprints in your blood – researchers are figuring out how forever chemicals transform in your body to read these clues

Virtually every living thing on Earth, from Patagonian penguins to newborn human babies, has been touched by the synthetic chemicals known as per- and polyfluoroalkyl substances, or PFAS. In fact, you would be hard pressed to find a sample of human blood, tissue or breast milk without…