Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system.  Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.
We have seen an insane number of hardcore bodybuilders take to SARMs as the latest is supplements. The fact that SARMs has gained so much attention over the past 5 years is no surprise. The promise of larger muscle mass without all the fast and side effects has really been popular. There just hasn’t been anything quite like this in our lifetime. For far too long bodybuilders had to resort to using very harmful mixtures to get these results. Bodybuilders are looking at SARMs as the one of the answers that they have been needed for a long time now.