Hopefully the price will come down more as it becomes more prevalent or as generics become available.
You reconstitute it with Bacteriostatic Water which is available without a prescription in the USA and contains 0.9% benzyl alcohol to inhibit bacterial growth.
If you're particularly concerned you buy a 0.22 micrometer PVDF "syringe filter" and pump it through that to another, fresh/sealed sterile vial which you can get for like $2.00 from a medical supply company (the syringe, filter, and vials are gamma-irradiated to destroy any remnants of RNA/DNA). That size filtration will filter out any lifeforms (fungal, bacterial, viral) while allowing the peptide/drug itself to pass through. So you get a guaranteed sterile solution out of the filter.
The same distributor sells legal things to import like L-Carnitine, Epitalon, Berberine, NAD+, NACET, and vitamins at great prices so I was saying I use them for things like that.
But others use them for GLP-1 agonists and many do their own independent testing.
0.22 won't filter out viruses, but time will inactivate enveloped viruses (which are usually the ones you want to avoid injecting), and source control/proper handling should take care of the rest.
This is ignorant/uniformed, but, taking research chemical by ingestion feels like I have some natural barriers still. Where-as I feel like there's a much more raw exposure to risk with injection. Also there's dumb risks like infection, if I don't attend well enough to injections.
In spite of these protests, I think you are probably much closer to the truth here. Thanks for writing. These reactions I have are, I suspect, not really significant.