The family of fibroblast growth factors (FGFs) was discovered in 1975 [1] and has since been investigated in numerous scientific studies. The FGFs comprise a group of 22 small polypeptides (consecutively numbered from FGF1 to FGF23, except for FGF15, which has not been identified in humans yet), which all have more or less important roles in embryological and postnatal development, as well as in human metabolism [2].
