Our goals vary depending on our pursuit, depending on our need but generally speaking the same rules apply to all if we are to maximize activity and reach the productive end we truly desire. For the individual who supplements with anabolic androgenic steroids for therapeutic measures, most commonly being that of low testosterone treatment, as testosterone is needed androgen replacement is really all they will be concerned with; after all, if you’re testosterone deficient the only thing that will cure it is androgen replacement. It is the performance enhancer that will truly find understanding here to be a little more worthwhile as quality stacks and cycles will generally include steroids of both anabolic and androgenic nature and activity.
As the use of anabolic androgenic steroids will suppress natural testosterone production, with total suppression varying from steroid to steroid, in most cases the primary androgen testosterone is needed in exogenous fashion in order to maintain adequate levels in the body while the cycle is in play. For many this will be the only androgen they will need and anything else they add may be of a strict anabolic capacity; this does not mean you must add anything, some will be fine even more than fine with only testosterone; after all, it is not only highly anabolic and androgenic in nature but equal in both in-terms of makeup and action and extremely well-tolerated by most healthy adult men. For others , especially those who are really looking to grow and this is found in many bodybuilding and hardcore gym circles, multiple androgenic items may be coupled together in the same cycle with an additional possible strong anabolic in nature steroid. Prime examples of such stacks might be Testosterone/Trenbolone/ Anadrol ; with this stack you have two steroids of powerful anabolic and androgenic power and a third steroid in Anadrol, while possessing decent androgenic activity highly anabolic in nature.
Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
A common mistake regarding fat loss steroids and steroids in general for that matter is that if you use them results will happen all on their own. Much of this ridiculous way of thinking is due to the manner in-which steroids are perceived by popular culture; as dark substances from a mystical land of evil. The fact of the matter is, if you are using fat loss steroids, if your diet is not that of a calorie deficiency, meaning you are burning more calories per day than you are taking in, then you wont lose fat. You still have to diet and train/exercise; steroids can simply help you burn more fat than you would otherwise, they are not magical.