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Hematological alterations can be reversed with treatment

The lack of Vitamin B12 in the diets of vegetarians has challenged researchers to develop veganic and vitamin-enriched dietary resources and supplements

Reduced Inflammation Optimal B12 levels may help modulate inflammatory responses: Supports balanced immune function Helps regulate cellular repair mechanisms May reduce inflammatory markers in some individuals Supports overall cellular health This anti-inflammatory effect can contribute to improvements in various inflammatory conditions

And this is not to be mistaken for a comprehensive list

Prolonged vomiting or diarrhoea can lead to dehydration and, in some cases, acute kidney injury (AKI)