On the black market Deca remains one of the most popular anabolics in circulation. Currently 200mg/ml preparations from Mexico are dominating the marketplace, and due to their high availability and lower cost are minimizing the appearance of lower dosed compounds. For example, in addition to Norandren 200 Brovel also makes Norandren 50 (a 50 mg/ml version of this steroid), but it is almost unseen right now. I should point out that their 50m1 vial of Norandren 200 is also the largest container of nandrolone to be found in such strength, and represents one of the best values anywhere for this steroid. We can see why it is much more desired right now. Also common are Nandrolona 200 from Tornel and Decanandrolen from Denkall, both in 1 Oml vials. In an effort to provide more innovative, conspicuous and cost-effective products, the Mexican firm Ttokkyo has recently topped its competitors and released Nandrolona 300. This is a 300mg/ml preparation of nandrolone decanoate, which is by far the highest dose of this compound ever to be produced commercially. To spite the defiant opinions of many, indeed this is a legitimate product. I have not experimented with the solubility of nandrolone decanoate myself, but do know that this particular ester is highly fat-soluble. Reaching 300mg in a milliliter of oil does not seem like an unreasonable or impossible task, and I would guess requires at best some minor tweaking of alcohol levels (perhaps none at all).
The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
The fact is that anabolic steroids do present various health risks – they are not without their faults and potential risks, as with anything. However, the context under which they are utilized presents a vast difference in how much of a risk is being taken. Responsible and judicious anabolic steroid use among healthy adult males is a significantly different situation in comparison to anabolic steroid use among children, teenagers, and females. Within the context of healthy adult male anabolic steroid use, the associated and proposed risks plummet by a massive degree, and from what we already know from studies referenced above, the average anabolic steroid user is in fact not teenagers and nor are they athletes, but are healthy adult males in the median age range of 25 – 35 years of age. Other more recent studies have also supported this fact among steroids statistics, where a 2006 study that surveyed 500 anabolic steroid users found that almost 80% of these users were not competitive athletes or bodybuilders but instead average adult physically active males  . Furthermore, the majority of anabolic steroid users are short-term users that do not engage in lifetime use (either in cycles or constant use), and that the rate of actual lifetime use among anabolic steroid users was found to be % for males, and % for females5. What this means is that only % and % of all male and female anabolic steroid users respectively will engage in lifetime use (mostly via subsequent cycles), while the rest will only utilize anabolic steroids once or a handful of times during their life.