If your primary concern is musculoskeletal (joint pain, tendon repair, muscle recovery), subcutaneous injections are the standard approach
From a psychiatric perspective, the peptide market is filling the same gap the GLP-1 conversation revealed, the not sick but nowhere near well, which is a real clinical need
In the case of HCG injections, a false-positive just may happen if the pregnancy test is done before 12-14 days because after the injection, it takes at least 10 days for the hormones to be eliminated from blood and urine
Introducing outside chemicals or alternative peptide structures directly into the vial can alter the pH, disrupt the molecular stability, or cause the components to precipitate out of the liquid solution
Acknowledgements We appreciate the statistical help of Paul Shragg and Reena Deutsch, PhD, of the NIH/NCRR-sponsored UCSD Clinical Research Center (MO1-RR00827)
They understand the research nature of the products