b12 injection effects on body Feeling worse after Injection: Answering concerns Vitamin B12 Injection Side Effects

For example, these shots are often used to prevent or treat pernicious anemia a rare blood disorder that results from the intestines not absorbing enough B12

Some people experience slight discomfort at the injection site, and minor side effects like headache or nausea are rare

If you have any questions about this, talk to your health care provider.

Vitamin B12 plays a vital role in maintaining your overall health, supporting energy levels, enhancing mood, and boosting cognitive function

Mild nausea and digestive discomfort Some users report mild nausea, particularly when injecting on an empty stomach first thing in the morning