Many patients experience more energy and focus within hours after their vitamin B12 shot, with continued benefits building over time
Neurology 2019 [Epub ahead of print] McElroy SL
While age was associated with clinical symptoms, there was very little association between MMA levels and other biochemical parameters or clinical symptoms, including neurological symptoms
If it starts after a day, theres an increased chance that youll have delayed recovery and the swelling or bruising may continue up to 24 hours longer
Liu, C., Jiang, L., Liu, L., Sun, L., Zhao, W., Chen, Y., et al., Front
The primary causes include: Autoimmune Response: The immune system attacks stomach cells that produce intrinsic factors, preventing vitamin B12 absorption