According to clinical resources such as the Mayo Clinic, while B12 is essential for nerve and red blood cell health, theres no strong evidence that injections improve energy or aid weight loss in people without a documented deficiency
Routes of Administration Oral (only route): Capsule form, typically available in 50 mg capsules
A common protocol, for example, is to begin with about 20 mg of NAD+ (corresponding to a small volume from the vial, typically around 0.1 mL depending on concentration) administered subcutaneously and gradually increase the dose over subsequent injections up to around 100 mg per injection
In terms of side effects, most users report minimal issues, with occasional mentions of mild digestive discomfort
[14] Doctors usually recommend intramuscular injections, which is what we're describing
However, some people cannot take vitamin B12 injections safely, including those with Lebers disease or similar eye concerns, kidney disease, liver disease, iron or folic acid deficiency, an active infection, or those taking medications that may interact with vitamin B12
