Semaglutide is a glucagon like peptide-1 which consists of at least 30-31 amino acids technically called a polypeptide. Since it is pretty short, it is considered to be very stable because they go through the lyophilization process in which water is removed from a product after it is frozen and placed under a vacuum. If a compound pharmacy has automated fast-flow peptide synthesis instrumentation this peptide can easily be made. Even reconstituted it is good for about 56 days stored in the refrigerator. In fact, quite a few peptide companies sell it as well as the Chinese are pumping out tons of it.