Deficiency of vitamin B12 may cause tiredness, weakness, constipation, loss of appetite, weight loss and megaloblastic anemia (a condition when red blood cells become larger in size than normal)
Unlike oral supplements, which must go through the digestive system and may be poorly absorbed, B12 injections bypass the gastrointestinal tract entirely
Reconstituted vials should never be left out for more than a few hours
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Enhanced Cognitive Function: The benefits of improved focus, memory, and mental clarity are commonly reported
Which method wins here really comes down to your personality: if you are disciplined and dislike needles, pills may suit you