Vitamin B12 shots are often prescribed for people with: Pernicious anemia (autoimmune destruction of intrinsic factor needed for B12 absorption) Gastrointestinal surgeries (e.g., gastric bypass, ileal resection) Crohns disease or celiac disease Chronic alcoholism Long-term use of acid-reducing medications Vegan diets without supplementation Infants or children with congenital absorption disorders (i.e., vitamin B12 for kids in clinical care) Injections ensure direct delivery into the bloodstream, bypassing the digestive system entirely
In practical terms, a 95 kg person with 30% body fat who maintains a 400-calorie daily deficit might lose 5-6 kg total over 12 weeks through diet alone
How often IV B12 is given can vary from weekly to monthly, depending on how the patient responds and the reason for the deficiency
Deltoid and Thigh Injection Sites Buttock Injection Sites Vitamin B12 Injection Instructions After choosing your injection site, follow these steps for how to give a B12 shot for a painless dosage every time
Rare: mild nausea (brief, self-resolving)
However, growth hormone has also demonstrated effects in maintaining body composition