According to the sources cited in Figure 2 for T1D, peripheral venous plasma glucagon concentrations in STZ‐ or alloxan‐induced diabetes in rodents vary between a low of 20 pM and a high of 246 pM, with a mean inside the transitional zone, 78.2 ± 17.3 pM (Figure 2c). Here, GCG is linked to diabetes mellitus.