after effects of vitamin b12 injection What Does a Shot Do for You? B12 Deficiency Another question that filled my

But you might feel pain, redness, or swelling where you got the shot

Symptoms of low levels of Vitamin B12 in your body include anemia, weakness, fatigue, heart palpitations, pale skin, constipation, diarrhea, bloating, loos of appetite, nerve problems such as tingling or numbness, muscle weakness, loss of vision, mental problems such as changes in mood and depression

[5] A later Scientific Reports study evaluated 5-amino-1-methylquinolinium in diet-induced obese mice combined with a diet switch and focused on microbiome and adipose-tissue metabolite patterns

these effects are dose-dependent and resolve with dose reduction