vitamin b12 injections for ulcerative colitis and Crohn's: Possible links and more Vitamin B12 oral treatment regimens

For patients seeking weight loss who request B12 injections, GPs should: Assess for genuine deficiency through appropriate blood tests rather than empirical treatment Provide education about the lack of evidence supporting B12 for weight loss in non-deficient individuals Explore underlying concerns about weight and energy levels, addressing these through appropriate channels Signpost to evidence-based resources such as NHS weight management services according to local pathways Patients should contact their GP if they experience unexplained fatigue, neurological symptoms (numbness, tingling, balance problems), or signs of anaemia (pallor, breathlessness, palpitations), as these may indicate B12 deficiency requiring investigation

Vitamin B12 is used by every cell in the body and supports overall health, including the nervous system and blood cells

Neurol Sci 46:56075619

There is no gold standard test that gives a clear, unequivocal answer to the question does this person have a vitamin B12 deficiency, yes or no