These trials tracked numerous safety parameters and laboratory values, but vitamin b12 levels were not routinely monitored or reported in the published results
Reusing needles, using contaminated Vitamin B12, not washing your hands, or improperly preparing the injection site may cause abscesses to form
Problems due to lack of cell division in fast dividing tissues: Anaemia, or any cytopaenia (including leucocytes, lymphocytes, platelets) Mouth ulcers, malabsorption, diarrhoea due to macrocytosis and atrophy of the intestinal mucosa as demonstrated by Foroozan and Trier
Never spray directly onto the powder cake or shake vigorously
Possible side effects include: headache, flushing (warmth or redness of the face), dizziness or light-headedness, nausea, or transient fatigue/somnolence