Aldehaini in 2021 observed the shortening of TL in T2DM and found TERT C/A SNP associated with high plasma levels of the telomerase but they did not find any association with telomerase deficiency or TERC and TERT gene polymorphisms (AlDehaini et al., 2021). The gene discussed is TERC; the disease is hyperinsulinemic hypoglycemia, familial, 4.