can b12 injections cause weight gain Vitamin Injection Dose for Loss: What Does the Science Say? Does a B12 injection increase

Injections are generally for people with systems and bodies that have problems absorbing vitamin B12 and those who have undergone gastric surgery

Check with your pharmacist if unsure

According to this program the highest dose is 0.85mg

23 Supplementation of 1 mg daily is recommended for patients with specific risk factors (e.g., bariatric/gastric surgery patients, those with severe malnutrition, chronic alcohol use, chronic hemolytic anemia and conditions with high cell turnover, and use of antimetabolite medications such as methotrexate)

If your B12 deficiency is not diet-related, you'll need to take B12 injections