Semaglutide and tirzepatide do not directly cause muscle wasting
If the underlying disease process has resolved and cobalamin body stores have been replenished, serum cobalamin concentration should be supranormal [higher than normal] at the time of reevaluation
Dejgaard TF, Schmidt S, Frandsen CS et al (2020) Liraglutide reduces hyperglycaemia and body weight in overweight, dysregulated insulin-pump-treated patients with type 1 diabetes: the Lira Pump triala randomized, double-blinded, placebo-controlled trial
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However, preclinical studies demonstrate therapeutic effects with once-daily or even less frequent administration, suggesting tissue distribution, receptor binding, or cellular signaling effects extend beyond plasma clearance