The definition of half-life in regards to biology and pharmacology is simply the time required by the body, tissue, or organ to metabolize or inactivate half the amount of a substance taken in (Taber’s Cyclopedic Medical Dictionary). These principles are used for all medications, not just AAS. I’m going to break this down to the simplest form I can so bare with me because it may get a little confusing. The key thing to remember when it comes to half-life’s is that they will always ...