can i have b12 injection and covid vaccine COVID-19 Vaccine: Answers to Frequently Asked Questions (Part Two) Vitamin B-12 Shots Available Now
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Too Much Vitamin B12 Linked to Acne Too much vitamin B12 may promote acne, according to a new study

Thus, megaloblastic anemia should not be treated with folic acid until the underlying cause has been determined (20)

That depends on your goals
