These influence appetite, blood sugar regulation, and insulin sensitivity
Those with a diagnosed deficiency - usually through a symptom checker alongside a simple blood test - will be prescribed and offered regular vitamin B12 intramuscular injections through their GP practice, district nurse, or NHS services
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Transient potassium replacement at the initial stage of vitamin B 12 replacement, especially in those with low-normal serum potassium, can prevent subsequent hypokalaemia