Profiling at mRNA, protein, and metabolite levels reveals alterations in renal amino acid handling and glutathione metabolism in kidney tissue of Pept2/ mice
A 2021 study tracking substrate oxidation in fasted subjects found that peptide agonists administered during the cortisol peak increased fat oxidation by 1822% compared to evening dosing, sustained across an 8-hour measurement window
Glutathione binds to free radicals via sulfhydryl groups, thereby accelerating their excretion
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However, abrupt discontinuation of GLP-1R agonists in patients with metabolic disorders may lead to rapid weight regain and potential exacerbation of IIH symptoms, as reported in a case study [101]
Limitations A key limitation was the rarity of trials directly comparing tirzepatide and semaglutide, leading to indirect comparisons