Medications with narrow therapeutic windows like warfarin, cyclosporine, or certain antiarrhythmics may reach toxic levels when combined with berberine
Still, the Black Box warning remains: If you have a family history of endocrine tumors or medullary thyroid cancer, these drugs are not for you
Always follow laboratory safety protocols and consult with a healthcare professional for clinical applications of GHK-Cu
Sources Ragusa, F., Fallahi, P., Elia, G., Gonnella, D., Paparo, S
Diabetologia 45 , 195202 (2002)
A consultation with a healthcare professional is recommended to determine whether a B12 deficiency injection is appropriate before travelling