Vassopressin, Volume 111, the latest release in the Vitamins and Hormones series, first published in 1943, covers the field of hormone action, vitamin action, X-ray crystal structure, physiology and enzyme mechanisms, with this release focusing on topics relating to hepcidin, bacterial infection, and iron overload, the role of heparan sulfates in hepcidin regulation, hepcidin CDNA and human gene sex hormones, growth factors and hepcidin, HFE gene polymorphisms and hereditary hemochromatosis, hepcidin and il-1beta, hepcidin-ferroportin axis, cardiomyocyte hepcidin, adipocyte iron, leptin and hepcidin, regulators of hepcidin expression, and much more.