For dietary B12 deficiency without malabsorption, oral cyanocobalamin may be an appropriate alternative to injections
A low brain magnesium level can be an expression of neuronal hyperexcitability of the visual pathways and be associated with a lowered threshold for migraine attacks (Aloisi 1997)
GPs can prescribe B12 injections following appropriate investigation, which should include: Full blood count to identify macrocytic anaemia Serum B12 and folate levels to confirm deficiency (using laboratory-specific reference ranges) Methylmalonic acid and/or homocysteine when B12 results are borderline Intrinsic factor antibodies if pernicious anaemia is suspected Additional tests depending on clinical presentation (e.g., thyroid function, coeliac serology) When both B12 and folate deficiency are present, B12 should be replaced before folate to avoid precipitating subacute combined degeneration of the spinal cord
These cells deliver essential oxygen to working muscles during exercise, delaying fatigue and enabling longer training sessions or competitive performances
Nerves that are more likely to be damaged are those in your arms, feet, and hands, though much of your body could be affected and cause uncomfortable or even painful sensations
Your provider will use blood tests to track your progress and make sure your B12 levels are rising as expected
