Technically, you can drink alcohol while taking venlafaxine, but they each have side effects, and these can worsen when you combine them
GHK-Cu is widely known as a copper-binding tripeptide associated with collagen production, skin and hair research, and cellular signaling
PEGylating or fusing peptide with albumin/Fc domain are also feasible and even the DPP-4 would be resisted by steric hindrance if the latter method is taken
Anyone with known copper metabolism issues should consult physicians before using copper peptides in any form
Berberine may also help keep blood glucose in check via other mechanisms, such as reducing gluconeogenesis (glucose production by the liver), stimulating glycolysis (metabolism of glucose for energy), promoting insulin secretion, and reducing intestinal glucose absorption