b12 injection dose schedule Vitamin Dosage: 7 Facts Adults Should Know Cobalamin (vitamin B12) and Folate

Also, people with diabetes who take a medication called metformin are at a higher risk of developing B12 deficiency because this medication can reduce B12 absorption

Some individuals may experience an increase in symptoms like headaches or lethargy shortly after a B12 injection, this effect should be temporary and followed by symptom improvement

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While most people obtain B-12 from meat, eggs, and dairy, excessive intake from food and supplements has no adverse effects in healthy individuals

B12 shots typically require weekly or monthly visits, while IV therapy sessions are usually scheduled every two to four weeks