I think the labs are going to vary widely between different peptides and even between the same peptide being utilized for different applications. Generally, labs that come to mind (and without regard to where these may be more appropriate and indicated) – CBC, CMP, Vit D, mag, B12, iron studies, A1c, fasting insulin, hs-CRP, ESR, IGF-1, immunoglobulin panel, CD4:CD8, cytokine panel. Additional testing could include panels for oxidative stress and mitochondrial performance, glutathione.
There is perhaps a temptation to throw everything at the wall and see what sticks, but I don’t think that’s the correct approach, and many people (at least in my area) are going to face affordability issues when faced with expansive labs on top of the cost of peptide therapy itself.
All in all, the best bet would be judicious and selective use of labs that have the highest yield and greatest relevance to clinical decision making.