which is better nad or ghk cu NAD+ GHK-Cu… glow are you going for? ✨ Boost Energy & Brain Function

DOI: 10.3390/nu11010070

Patients with Chronic Medical Conditions: BPC-157 interacts with multiple biological systems (vascular signaling, inflammatory pathways)

GHK-Cu is Copper Tripeptide-1

Blood 2006, 108, 13881394

Always good to have a reason I have also had this happen when my folate was low , it may be worth you getting it checked I had self inject my B12 every 4 weeks for the last 20+ (cannot really remember how long accurately), and 2 months ago got a similar 'electric shock tingling' all over my body - head, face, arms, hands, legs, feet etc within a couple of minutes of injecting, which lasted about 3 seconds or so