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 . 
Steroid cycle is the time when people take steroids also referred to as on-cycle by athletes and bodybuilders. The time when steroids are not being taken is called off-cycle. Average steroid cycles last between four and twelve weeks. There are many individuals who take more than two oral anabolic steroids at the same time and this procedure is called stacking. Oral anabolic steroids are quick acting and they offer faster results. However, it is important to note that they can turn toxic with continued usage. Therefore, it is always a good idea to take legal steroids orally for a month and then switch to injectable steroids. It is also worth noting that legal anabolic steroids are used for the treatment of different debilitations and diseases in palliative medicine.
If you planning to buy anabolic steroids online , you must understand about the chemical structure and formula behind the manufacture of steroids to avoid side effects, that's why you should do a post cycle therapy after your steroids cycle . The steroids are synthetic hormones which can enhance the potential of body to stop muscle breakdown and prevent faster growth of muscles. Athletes usually take steroids to improve aggression, speed, stamina and strength. Athletes use steroids to lift heavier weights, run faster, jump higher and improve their power while performing in competitions.