The weight loss injections currently on the market are all GLP-1 (glucagon-like peptide 1). GLP-1 is one of the four hormones that primarily help control body weight. The three injections are Victoza (one shot, once a day), Symlin (one shot, twice a day) and Byetta (one shot, twice a day). In January 2012, there is supposed to be a one shot, once a week version of Byetta released. In addition to injecting GLP-1, the addition of a DPP-4 Inhibitor (Dipeptidyl Peptidase Inhibitor) that inhibits the breakdown of GLP-1 in the body, can also help weight loss. HCG injections do not speed up fat burning or help you lose weight.