SELENOS and diabetes mellitus: In the study of healthy control group and diabetes mellitus group, Hardy‐Weinberg equilibrium test showed that there was no significant difference in the theoretical frequency and observation frequency of the four Selenoprotein S loci genotypes in diabetes mellitus group, and there was no significant difference in the theoretical frequency and observation frequency of the other three loci except rs28665122 in healthy people, which was consistent with Hardy‐Weinberg equilibrium random mating group.