Yes, GHK/Epithalon integrates well with comprehensive longevity and aesthetic protocols including other peptides, hormone optimization, NAD+ therapy, senolytics, cosmetic procedures, and lifestyle interventions
Serious adverse events are rare and typically associated with improper dosing, poor-quality peptides, or individual predisposing factors
That said, consult your doctor if you have serious health issues
The peptide does not appear to significantly affect glucose metabolism or insulin sensitivity in the way that full-length growth hormone does - growth hormone causes insulin resistance through various mechanisms, whereas AOD9604 has been reported to be neutral or possibly even beneficial for insulin sensitivity
The effects of vitamin B12 shots can vary from person to person