what happens if you inject b12 into a blood vessel Vitamin shots: Uses, benefits, and side effects Where To Inject Vitamin B12

Potential common lipotropic injection side effects include, but are not limited to: stomach upset, diarrhea, urinary frequency/urgency/hesitancy, fatigue, elevated heart rate, and restlessness

In most cases, treatment for B12 deficiency is effective, and a person will not continue to have symptoms

And unless you have low vitamin B-12 levels in your body, vitamin B-12 shots arent likely to give you more energy or improve your performance

1 The British Society for Haematology does not recommend retesting vitamin B 12 levels after treatment has been initiated, and no guidelines address the optimal interval for screening high-risk patients