FGF23 and autosomal dominant hypophosphatemic rickets: More or less at the same time, FGF23 was described in the murine brain in thalamic nuclei,(1) while putative gain‐of‐function mutations in the FGF23 gene were independently identified as the genetic cause of autosomal dominant hypophosphatemic rickets (ADHR), an inherited renal phosphate‐wasting disease.(2) The latter finding turned out to be a seminal discovery with major impact in the field of bone and mineral homeostasis.