HCG 5000 refers to your dosage energy (5000 IU) of Human Chorionic Gonadotropin (HCG), a hormone produced in the course of pregnancy. In professional medical and Physical fitness contexts, it can be used for many purposes: what's HCG? Human Chorionic Gonadotropin (HCG) can be a hormone In a natural way made by the placenta in the course of pregnan