He continued, “That’s my advice to everyone out there. Do your research and learn as much as you can about anything before you do it. There’s always a better way to do something. If you have the choice to do natural or do steroids, stay natural. There’s no reason to do steroids. You’re only hurting your body and hurting yourself. But if you want to become a professional bodybuilder, guess what? You’re probably going to have to f—— do them. You’re not going to have a choice — you’re going to have to do them. That’s the boat I was in. I was competing on stage and I was getting to point where I was going to keep getting blown off the stage if I didn’t do them. So I took that step and that’s the road I chose. And here I am.
Steroid isolation , depending on context, is the isolation of chemical matter required for chemical structure elucidation, derivitzation or degradation chemistry, biological testing, and other research needs (generally milligrams to grams, but often more  or the isolation of "analytical quantities" of the substance of interest (where the focus is on identifying and quantifying the substance (for example, in biological tissue or fluid). The amount isolated depends on the analytical method, but is generally less than one microgram.  [ page needed ] The methods of isolation to achieve the two scales of product are distinct, but include extraction , precipitation, adsorption , chromatography , and crystallization . In both cases, the isolated substance is purified to chemical homogeneity; combined separation and analytical methods, such as LC-MS , are chosen to be "orthogonal"—achieving their separations based on distinct modes of interaction between substance and isolating matrix—to detect a single species in the pure sample. Structure determination refers to the methods to determine the chemical structure of an isolated pure steroid, using an evolving array of chemical and physical methods which have included NMR and small-molecule crystallography .  : 10–19 Methods of analysis overlap both of the above areas, emphasizing analytical methods to determining if a steroid is present in a mixture and determining its quantity.