Dehydration exacerbates headaches, dizziness, and fatigue
A lack of this important nutrient can cause tiredness, brain changes, and big red blood cells
The medical professional administering the shot may pinch the skin around the site and inject the liquid from the syringe either intramuscularly or subcutaneously
this is why most people do better with sublingual B12 tablets rather than vitamins
The lowered absorption rate and increased frequency attributed to oral supplements can cause the overall treatment process via tablets to be slower than that of B12 injections
Other indications include malabsorption disorders (such as Crohn's disease or coeliac disease), following gastric surgery, strict vegan diets without supplementation, and certain medications that interfere with B12 absorption