too much b12 injection side effects Vitamin B12: Overdose and Too much vitamin B12: Level

The 2026 Sports Medicine and JAAOS Global Research and Reviews papers (PMID 41966639, PMID 41490200) place multiple compounds including this one into the wider research context of unapproved compounds under active investigation, with attention to both the mechanism findings and the regulatory framing that researchers consulting these reviews should weigh equally

These injections may cause (11): Diarrhea or constipation Dry mouth Fatigue Incontinence Increased heart rate Anxiety Insomnia Feet and hand numbness Nausea Vomiting Palpitations Elevated blood pressure The intensity of the side effects of lipotropic injections can vary

But remember, B12 shots and weight loss work best when combined with the right diet and regular exercise

Healthcare services administering B12 injections should have anaphylaxis protocols and equipment available

Vitamin B12 helps support your bodys natural energy production and metabolism