First and foremost it’s important to know the weight loss ingredients that are contained in the HCG injection diet. HCG stands for Human Chorionic Gonadotropin and it contains essential components for the proper functioning of both the male and female reproductive systems. When HCG is in its pure form is referred to glycoprotein which contains oligosaccharide chains. Basically glycoprotein contains a mass of hundreds of amino acids. Both males and females produce low amounts of during their entire life but expectant mothers tend to produce higher levels of HCG during the pregnancy period.