Perfluoroalkyl substances and metabolic outcomes in pregnancy

Perfluoroalkyl substances (PFASs) were put on the market more than 50 years ago. They were not believed to enter biological systems or to be biologically active and it came as a big surprise when they were found in wildlife. Later, they were found in humans and are now ubiquitously present in many populations. It is of concern but we still do not know how serious the potential health problems are.