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A mild deficiency may cause no symptoms
Additionally, alcohol can exacerbate gastrointestinal side effects such as nausea and may contribute to dehydration if combined with vomiting or diarrhea caused by the medication
According to other studies, the B12 vitamin has a half-life of approximately six days in the blood, implying that it would take six days before half of the injected amount was eliminated from the body
B12 deficiency can also cause water retention, constipation, muscle weakness, fatigue, and weight loss
These injections are particularly helpful for individuals who have difficulty absorbing B12, as well as those who have undergone gastric surgery, since they make it possible for B12 to be absorbed without first being digested
