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This article was reviewed by Lynn Marie Morski, MD, JD. Key Takeaways: Tirzepatide with B12 is sometimes combined as a weekly injection for weight loss. Vitamin … ...

Vitamin B12 shots are injections that a doctor may prescribe to treat a vitamin B12 deficiency. They may be useful for those with gastrointestinal issues, older adults, vegans, and vegetarians. A ...