can b12 injections cause headaches does injection headache Vitamin B12 deficiency cause symptoms like headaches, fatigue, depressive mood Vitamin B12 levels low? My

Also, certain medications, like proton pump inhibitors and metformin, might affect B12 absorption

[1] [2] As a dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist, tirzepatide enhances insulin secretion, suppresses glucagon release, and slows gastric emptying to improve glycemic control and promote weight loss

Generally, the effects of Vitamin B12 injections start waning after a week

If people lose weight while getting mic b12 shots , it may be driven mainly by the surrounding program (dietary changes, activity, counseling, and consistency), rather than the injection formula itself