Switching contraceptives unilaterally and at short notice is not something to do without advice
The Pernicious Anaemia Society notes this is recognised but not fully understood
However, since absorption into the body from the gut appears limited, injectable forms are still used for bodywide effects
We can also advise on lifestyle changes, which may help those without an underlying deficiency
Signs of Vitamin B12 deficiency Persistent tiredness or weakness Pale or yellowish skin Shortness of breath on exertion Loss of appetite Pins and needles (especially in hands or feet) Poor concentration or brain fog Low mood or anxiety Glossy, sore tongue Left untreated, B12 deficiency can lead to pernicious anaemia , a condition that requires medical management
Given their non-invasive nature and similar clinical performance, these routes may represent suitable alternatives to intramuscular therapy, particularly in settings requiring long-term management