Drugs can be added and removed from this list by WADA annually, although not all of the banned substances are explicitly named. Caroline Hatton, PhD , a sports anti-doping science consultant, told in a Mar. 12, 2010 email that "A key concept in prohibited lists is that they avoid being finite. Instead of listing all banned drugs one by one, they list entire drug classes and name drugs merely as examples. This is to keep users who took designer drugs from claiming that they didn't break the rules because the drugs they took weren't listed."
Another good example is Clenbuterol or Clenbuterol pills. This specific steroid has the distinct purpose of helping asthma sufferers to breathe better. Still, on the subject of steroids, it is common to hear the words cycle or stacking thrown around. A cycle or more specifically a Dianabol cycle is a popular practice of suspending the use of the steroid temporarily in order to avoid certain side effects such as overworked kidneys or liver . On the other hand, the best steroid stack is the act of combining the usage of two or more kinds of steroids in order to harness a combination of desired effects.
Neural injections of Bromodeoxyuridine (BrdU) were applied to males of both groups to test for neurogenesis . Analysis showed that testosterone and dihydrotestosterone regulated adult hippocampal neurogenesis (AHN). Adult hippocampal neurogenesis was regulated through the androgen receptor in the wild-type male rats, but not in the TMF male rats. To further test the role of activated androgen receptors on AHN, flutamide , an antiandrogen drug that competes with testosterone and dihydrotestosterone for androgen receptors , and dihydrotestosterone were administered to normal male rats. Dihydrotestosterone increased the number of BrdU cells, while flutamide inhibited these cells.