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
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The product should be used by the expiration or best-by date printed on the bottle, provided it has been stored properly and kept sealed between uses
Name: Vitamin B12 Injectable Brands: VetOne: Vitamin B12 Description: Vitamin B12 Injectable is a supplemental injection used to help manage vitamin B12 deficiencies in horses, dogs, and cats
Tirzepatide + semaglutide or CagriSema better established