GSTM1 and diabetes mellitus: Zaki et al reported that 50% of Egyptian children with diabetes have almost 50% deletions of GSTM1, which was comparable to the general population, yet an unforeseen factor seemed to make these children develop the diabetes type 2 disease.[53] In the same study, the children with type 2 diabetes had other detoxification defects as GSTT1 and GSTP1.