THE ENDOCRINE SOCIETY WASHINGTON—Per- and polyfluoroalkyl substances (PFAS) and phthalates (two types of endocrine-disrupting chemicals) may be associated with lower bone mineral density in male teens, according to a new study published in the Endocrine Society’s Journal of Clinical Endocrinology and Metabolism. Endocrine-disrupting chemicals are chemicals or mixtures of chemicals that interfere with the way the body’s hormones...