A group of ergogenic aids taken to increase the levels of hormones or neural transmitters naturally produced by the body, including anabolic steroids, erythropoietin and human growth hormone
A naturally produced hormone responsible for the production of red blood cells. A synthetic copy 'recombinant' or RhEPO can be supplemented to increase red blood cell production typically used in patients with severe anaemia or kidney failure
Potential benefits and risks associated with erythropoietin use
Benefits: Increased red blood cell and haemoglobin count, Increased oxygen transport and aerobic capacity, Increased intensity and duration of performance before fatigue
Risks: Increased blood viscosity, Decreased cardiac output, Increased risk of blood clots and heart failure, Decreased natural production of EPO
Potential benefits and risks associated with human growth hormone
Benefits: Increased muscle mass and strength, Increased fat metabolism and decreased fat mass, Increased blood glucose levels, Increased speed of recovery, Increased intensity and duration of training
Risks: Abnormal bone and muscle development, Enlargement of the vital organs, potentially leading to multi-organ failure, Increased risk of certain cancers and diabetes