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
Its an incredibly effective preservative, but its efficacy isn't infinite, and it's certainly not invincible
5-Amino-1MQ is widely used in laboratory settings investigating metabolic pathways, enzyme inhibition mechanisms, and cellular energy regulation
Mood and mental clarity : Early research and anecdotal reports suggest women feel more mentally clear and emotionally balanced
Tiaminal B12 Injection: Combined B1 and B12 Therapy Tiaminal B12 injection is a special treatment