They will assess your needs and health before recommending the dosage
Addressing this concern, Hyderabad-based neurologist Dr Sudhir Kumar took to Twitter to note that while vitamin B12 deficiency is known to cause anaemia, peripheral neuropathy, dementia, psychosis and skin pigmentation, calling for supplementation, excessive vitaminB12 may have adverse effects on health and life. Excess of vitamin B12 may be hazardous 1
B12 injections may help alleviate symptoms of depression and improve overall mood
Reduced risk of health disorders (heart disease, stroke, infertility)
According to the NHS, taking less than 2mg of B12 supplements a day is unlikely to cause any harm
The absorption caveat: for older adults, low absorption is typically the primary driver of deficiency rather than low dietary intake