B12 is usually considered safe, but when combined with certain medications or other vitamins, things get complicated
Convenient professional supply
If youre taking vitamin B12 supplements in addition to the vitamin-rich foods youre consuming, you could experience diarrhea, nausea, vomiting and headache
Careful dosing ensures the therapy is both effective and safe for individual patients
However, observational studies suggest that whilst acute toxicity remains exceptionally rare, sustained very high levels of B12particularly from supplements or injectionsmay be associated with certain health concerns, though these are correlations rather than proven causal relationships
An individual following a plant based diet, who is at risk of developing a vitamin B12 deficiency