how does the b12 injection work B-12 (Methylcobalamin) Therapy Why B12 Shots are Better

The following adverse effects were reported in patients receiving semaglutide injection or oral tablets across all clinical trials and at incidences higher than with placebo: nausea (11% to 44%), vomiting (5% to 24%), diarrhea (8.5% to 30%), abdominal pain (5.7% to 20%), abdominal distention (2% to 7%), constipation (3.1% to 24%), dyspepsia (0.6% to 9%), decreased appetite (6% to 9%), eructation (0.6% to 7%), flatulence (0.4% to 6%), gastroesophageal reflux disease (1.5% to 5%), gastroenteritis (4% to 6%), and gastritis (0.4% to 4%)

F., Papaconstantinou, J., Fry, C

It also modulates nitric oxide production, supporting healthy blood flow and tissue oxygenation

On the plus side, I feel far less tired since having the injections

So, it may play a role in conditions such as Alzheimer's disease and stroke