National Heart, Lung, and Blood Institute
Mood Enhancement The relationship between B12 and mental wellbeing is well-established: B12 is involved in producing and regulating serotonin and dopamine It supports overall neurotransmitter balance Deficiency is linked to depression, anxiety, and mood instability Optimal levels help maintain emotional resilience While not a treatment for clinical depression, many clients experience improved mood stability and outlook with regular B12 injections
Route of Administration: Oral gavage, subcutaneous injection, intraperitoneal injection each route has distinct implications for absorption, bioavailability, and systemic exposure
However, serum levels may be maintained at normal or borderline levels at the expense of tissue concentrations
Low red blood cell counts (anemia) due to vitamin B12 deficiency
How are Vitamin B12 Side Effects Treated