If by compounding you mean producing semaglutide, no. If you have a source to buy lyophilized semaglutide and some BAC water, you could certainly reconstitute

If by compounding you mean producing semaglutide, no. If you have a source to buy lyophilized semaglutide and some BAC water, you could certainly reconstitute it yourself and pick a dosage, or compound in some vitamin b12 or similar. In practice for an average person, this means either buying them as research chemicals directly from china, or from resellers that mark it up by 10-50x. You might get a COA that testifies the chemical in question and it's purity level for that batch, and maybe that COA will actually match the batch in your vial. But you almost certainly won't get any guarantee on sterility. And there are reports of the contents of vials getting mislabeled, so people got entirely different products. You can try to counter some of the sterility issues with filter syringes, etc., but you're only mitigating some risk, not eliminating it.