Get your labs done people!
Most people dive into this without getting an adequate baseline of their health status. It's common amongst the men who start TRT to get a baseline of CBC, CMP, Testosterone, Estradiol, TSH, PSA before starting TRT treatment.
But people treat peptides differently, and just go into it cold turkey.
It's worth getting a baseline set of labs. For men, the above labs, and perhaps Vitamin D and Ferritin are something to consider.
Ask your PCP for a comprehensive blood panel during your annual visit.
If you don't want to talk to your PCP, order them labs yourself! Plenty of cheap options out there, including PrivateMDLabs, GoodLabs, Mereck, etc.
Personally I found https://goodlabs.com/ to be the cheapest option via Quest/LabCorp, a quick google search found a discount code: hormonetests for 20% off. Do your own research and don't sleep on getting labs done!