You will feel the benefits of the B-12 injection within 48 to 72 hours of receiving the shot.
That approval status is a hard regulatory fact, and it is the single biggest reason a CagriSema-versus-tirzepatide comparison is not a comparison of equals: one product has cleared a full regulatory efficacy-and-safety review, and the other has not yet
Other groups who may benefit include: Patients following gastric surgery (gastrectomy, bariatric procedures) where intrinsic factor production or absorption sites are compromised Individuals with malabsorption disorders such as Crohn's disease, coeliac disease, or chronic pancreatitis Strict vegans and vegetarians with dietary insufficiency, though oral supplementation is usually tried first Elderly patients with atrophic gastritis or reduced gastric acid production Patients on long-term metformin or proton pump inhibitors, which can impair B12 absorption Individuals with nitrous oxide exposure (recreational or medical), which can cause functional B12 deficiency Diagnosis typically involves serum B12 measurement, with levels below approximately 148 pmol/L (though thresholds vary between laboratories) generally indicating deficiency
Claims otherwise should be viewed with skepticism
Changing where you inject helps keep the treatment comfortable and effective
