The mechanism seems to be independent of the catalytic activity, since these effects were not mimicked by systemic DPP-4 inhibition (73, 82), and it was suggested that soluble DPP-4 interacted with caveolin-1 on adipose tissue macrophages, the down-stream effects of which combined with actions of other pro-inflammatory molecules such as factor Xa, to lead to activation of the inflammatory signaling pathway (83) (Figure 3)
Results often last up to a year
Sources An open letter from Eli Lilly and Company warning of potential patient safety risks associated with tirzepatide compounded with vitamin B12 Eli Lilly and Company March 12, 2026 Lilly finds impurity in compounded version of its weight-loss drug, warns of health risks Reuters March 12, 2026
Inadequate nutritional intake, particularly of minerals and vitamins, can predispose individuals to muscle cramps
This unique mechanism sets it apart from earlier GLP-1only compounds by potentially engaging multiple hormonal pathways involved in energy balance, insulin signaling, and appetite regulation