**2.7 Case report George**

**Focus:** growing body mass and INS/d in a man using SmartGuard mode and TIR 100%.

**History:** George (today 32 y/o) was diagnosed with T1D in April 2021 and treated with insulin *via* an insulin pen, immediately resulting in an initial decrease in HbA1c. By September of the same year, a hybrid insulin pump MiniMed 780G was implemented. George is compliant and has been achieving excellent compensation in terms of HbA1c and time in range (TIR). However, instead of entering data about the amount of consumed saccharides, which would have allowed the pump to automatically infuse the right insulin dose, tailored to his metabolism, glycemia, and remaining function of beta-cells, he has been entering the order for a bolus in insulin units (**Figure 17**). This order tends to be less effective, resulting in higher insulin intake and a gradual increase in body mass (**Figures 18** and **19**). Even though the conversion of saccharides to IU could be appropriate for the use of an insulin pen or pump without AHCL, it lowers the efficiency of pumps with AHCL. Current TIR: 100% (November 16, 2022).
