ObjectiveMortality is increased in patients with hereditary hemochromatosis, in individuals from the general population with increased transferrin saturation(TS), and also in patients with diabetes type 1 and increased TS from a highly specialised diabetes clinic. Thus, we have recommended targeted screening for TS in specialised diabetes clinics. Whether mortality is also increased in individuals ascertained from the general population with diabetes and increased TS is unknown.Research design and methodsIn two Danish population studies(N=84,865), we examined mortality according to baseline TS and hemochromatosis genotype(HFE) C282Y/C282Y in individuals with diabetes(type 1,N=118;type 2,N=3228;total,N=3346).ResultsThe cumulative survival was reduced in individuals with diabetes with TS≥50% vs.