Most commonly reported Mild stimulant-like effects (warmth, slight resting heart-rate rise) in the first 1 to 2 weeks
It might be an enzyme you have never heard of, one that is actively working against your fat loss efforts at the cellular level
Chewable B12 tablets begin absorbing through the oral mucosa before reaching the stomach, providing an absorption pathway that bypasses some of the reliance on intrinsic factor making the chewable format particularly well suited to those who may have compromised digestive absorption.*
Without proper guidance from a medical professional, it is possible to ingest excessive amounts of B12 especially if you misread the label or mistake micrograms for milligrams, for instance
taking over-the-counter pain relievers after vaccination (avoid them before, as there's some thought they could interfere with the effectiveness of the vaccine)
It is important to talk to your doctor or nurse about the risks and benefits of vitamin B12 injections before receiving them.