why do you have b12 injections Are Vitamin Shots Right for You? Vitamin B12 Injection at a

Studies that used 1 mg/day in oral and intravenous trials did not show meaningfully better outcomes than lower doses, and higher doses were associated with more reports of headache, diarrhea, and gastrointestinal effects

For most people with adequate B12 levels, additional intake through energy drinks is unlikely to meaningfully affect energy or alertness

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In the alkaline environment of the small intestine, R-proteins are degraded by pancreatic enzymes, freeing vitamin B 12 to bind to intrinsic factor (IF), a protein secreted by specialized cells in the stomach (parietal cells)

Can be used at home as an injection, under instruction of a doctor.

Vitamin B12 supports everything from the production of red blood cells to nerve function and DNA synthesis