Vitamin B12 absorption is a complex process requiring adequate stomach acid, intrinsic factor (produced by gastric parietal cells), and proper function of the terminal ileum
Figure 2 [12,13] shows how the signals that stimulate responses in the regulation of intake in the brain come from the digestive organs and adipose tissue
In contrast, APOE4 has been consistently linked to increased risk and earlier onset of Alzheimers disease (AD), possibly due to its detrimental influence on lipid homeostasis, mitochondrial integrity, and neuroinflammatory pathways (Volgman et al., 2024
2.59, I 2 86%/ FPG = -5.9 mg/dL, 95% CI -12.4
Note that semaglutide is available as either an oral tablet or an injection, whereas tirzepatide is available only as an injection