a 2025 IV pilot in two adults used 10 mg and 20 mg single infusions and reported no adverse effects (Lee et al., Alternative Therapies in Health and Medicine)
Before pursuing B12 injections or other interventions marketed for weight loss, patients should consult their GP for proper assessment, investigation of any underlying medical conditions affecting weight, and discussion of evidence-based treatment options
The dose figures above are the documented per-dose amounts
[3] Ridyard KE, Overhage J
Improved Metabolism: Helps the body process food more efficiently and promotes fat loss
Vegetarians may also benefit from [2] B12 injections may help with a wide range of symptoms like mental and physical fatigue, irritability, and numbness or tingling in your hands and feet