Honey
Draven you are right!
honey = EPO or Erythropoietin.
It is a protein hormone secreted by the kidneys and liver that stimulates red blood cell production - a process known as erythropoiesis. Red blood cells carry oxygen to the tissues of the body and so obviously are vital to maximal health and athletic performance - especially in endurance athletes such as long distance cyclists, swimmers, and runners.
Before the commercial production of EPO by recombinant DNA technology, athletes attempted to increase the red blood cell proportion of their blood -called the hematocrit - by a process known as blood doping. Blood doping involves an athlete first removing a substantial volume (a liter or so) of his or her own blood a few months prior to competition and freezing it. Shortly before competition, this whole blood or enriched red blood cells is thawed and re-infused into the athlete, resulting in an increase of hematocrit.
Blood doping was obviously a very inconvenient and dangerous procedure (i.e. infection, blood clots), so the introduction of commercially available EPO basically ended the practice for good. EPO only requires that a water based injection be taken a few times a week.