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
It is commonly prescribed to prevent stroke and systemic embolism in patients with nonvalvular atrial fibrillation, and to treat or prevent deep vein thrombosis (DVT) and pulmonary embolism (PE)
Topical use: Yes, widely available in cosmetic serums and creams
Any yellowing, browning, or cloudiness indicates degradation
Also, we used the doses that were reported in a previous study, which may not be optimal for treating PDL9 chondrocytes