mayo clinic vitamin b12 injections Vitamin B12 Injections (Cyanocobalamin Injections)

Conversely, severe VitB12 deficiency reportedly causes hypersomnia, possibly due to a disruption in circadian rhythm [41, 42]

While often mild and self-limiting, it causes some users to discontinue therapy or struggle with dose escalation

When stratified by administration route, the mean percentage changes were: Intramuscular (IM): 307% Oral: 285% Sublingual: 199% IM administration showed the highest average B12 increase, although oral and sublingual routes also yielded substantial improvements, supporting their use as effective and less invasive alternatives

People feel miserable and come in, they get a shot, and they feel fantastic for the next several weeks