I bought a low batch of semiglutide on peptidetechnologies.com, the bottles contain a label with QR code to a COA that shows a Janoshik test, this is the link: https://janoshik.com/tests/45587-Semaglutide_5mg_9INC2ZPM8T6P   The test they show gives a purity over 99%. BUT I sent off a sample to a drug lab anyway.

Below is the result, my sample is only 36% semiglutide, the rest appears to be mannitol, which is a sugar alcohol used as an osmotic diuretic- it can cause fluid and electrolyte imbalances, which can be very dangerous.