can a b12 injection give you a headache Vitamin Side Effects and Safety Headache After B12 Shot: Why

Some people with high vitamin B12 levels are at greater risk for liver or pancreatic cancer ( Cancer Epidemiology, Biomarkers & Prevention , April 2019)

Hi, Might be worth posting your update in a new thread as responses on older threads sometimes get missed

However, this approach is not routine first-line treatment in UK practice, is considered off-label, and requires good patient adherence and clinical follow-up

Understanding GLP-1 withdrawal symptoms provides insight into what happens when discontinuing therapy, which is relevant for anyone planning an exit strategy from the beginning

You might get mild redness, swelling, or itching on the injected skin

So, unless youre deficient, megadoses of vitamin B12 may be just passing through your body and making some organs work harder (NIH-a, 2021)