From Dopage du Jour:
erythropoiesis is essentially the production of red blood cells, and the more you have of those babies the better your oxygen transport capacity erythropoietin or EPO is the substance that triggers production of red blood cells - the more EPO you have the more red blood cells are triggered to mature in the bone marrow EPO production is normally in your kidneys but lately pharmaceutical companies have built factories to make it as well, for medicinal reasons only, of course Thyroid hormones, thyroid-stimulating hormone, adrenal cortical steroids (like glucocorticosteroids or Prednisone) , adrenocorticotrophic hormone, and human growth hormone (HGH) all promote erythropoietin formation, which again means more red blood cells in your blood; however before you all rush off to secure illegal supplies of banned substances let's note that the side-effects of these substances on otherwise healthy people will vary from catastrophic to dangerous, and in fact... Very high doses of steroid hormones (whatever that means - 50-60mg/day, perhaps of a cortico-steroid?) "seem" to inhibit erythropoiesis, which is to say lower your red cell production and release - and is thus not very good for your bike riding, is it?Click on that text to go to the full article.
