can you feel b12 injection right away How Quickly Does a Shot Work? What to Expect Feeling worse after B12 Injection:
Description
According to the American Association of Clinical Endocrinologists and American College of Endocrinology (AACE/ACE) Obesity Clinical Practice Guidelines, all patients undergoing weight loss therapy should be monitored for mood disorders, depression, and suicidal ideation

Its chosen based on what each patient needs

Recommended Dosage and Frequency After Bariatric Surgery The UK BNF standard regimen for confirmed B12 deficiency is 1 mg hydroxocobalamin IM on alternate days for two weeks, then 1 mg every three months
This is why it is so important that you take a vitamin B12 supplement daily, or get vitamin B12 injections routinely

This reduces some risks but does not eliminate all potential side effects
