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Can Vitamin B12 Cause a False Positive Drug Test

Possible side effects include: Nausea, diarrhea, vomiting, constipation, mild to moderate abdominal pain, headache, fatigue, dyspepsia, dizziness, abdominal distension, belching, hypoglycemia, flatulence, gastroenteritis, loss of lean muscle mass and gastroesophageal reflux disease

You should avoid eating grapefruit or drinking grapefruit juice

During later infancy and early childhood inadequate intakes of B12 due to low intake of animal-source foods and possibly malabsorption, may play a role (Sobczynska-Malefora et al., 2023)

That is the nuance most thin articles miss
