Yes, several GLP-1s have been in short supply for months, though some appear to be back in stock
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Comparable to other peptides linked to fatty acids (e.g., the insulins detemir and degludec, the GLP-1RA liraglutide and semaglutide), the fatty acid side chain allows binding to albumin after subcutaneous injection, slows enzymatic degradation and prolongs biological half-life (60)
However, high agonist efficacy might result not only from a propensity to stabilize conformer 1, but also from an ability to promote G protein turnover, which could be hindered if conformer 1 were too long-lived
PubMed laboratory research record [PMID: 19102506] PubMed record related to this compound for laboratory literature review
Wild-type IDH enzymes as actionable targets for cancer therapy