Semaglutide Potency and Identity Testing for Compounded Medication

I am seeking laboratory analysis of a compounded Semaglutide medication to verify its identity, potency, and concentration. The product was obtained through a compounding pharmacy. After a recent pharmacy change, the medication appears to have lost efficacy. I would like to determine whether the current formulation contains the correct active pharmaceutical ingredient (API) and whether it meets expected potency specifications or shows signs of dilution or substitution.

Testing requested includes compound identification, quantitative potency analysis, and impurity screening if applicable.