“Forever” PFAS chemicals appear to harm bone health in Hispanic teenagers, a new study finds. The more PFAS chemicals found in the bodies of Hispanic adolescents, the lower their bone density was, researchers report in the Dec. 6 issue of the journal Environmental Research. … Peak bone mineral density in adolescence helps predict whether a person will develop osteoporosis later in life, University of Southern California researchers noted. … Per- and polyfluoroalkyl substances (PFAS) are used in a wide range of consumer products, and also are widely present in drinking water and the environment.