Vitamin B12 And The HCG Diet: Can This Help With Weight Loss? What Is the Difference Between B12 Shots and Lipotropic Shots? Avoid human chorionic gonadotropin (HCG) weight loss products. HCG is not FDA approved for use without a prescription for any purpose. It is not approved for weight loss. IV Therapy and Vitamin Injections Ann Arbor & Wyandotte Michigan Med 1 Aesthetics Low Dose HCG Patient Instructions UH Fertility Center University Hospitals University Hospitals How to Mix HCG Injections 5000iu