Testosterone propionate was introduced in 1937 by Schering AG in Germany under the brand name Testoviron .  It was the first ester of testosterone to be introduced,  and was the major form of testosterone used medically before 1960.  In the 1950s, longer-acting testosterone esters like testosterone enanthate and testosterone cypionate were introduced and superseded testosterone propionate.  Although rarely used nowadays due to its short duration,  testosterone propionate remains medically available and is still marketed in the United States .  
Now that you know what is testosterone you will be pleasantly surprised to know that there is a new revolutionary formula called Testoxyl manufactured by Kalpa Pharmaceuticals . This patented formula is comprised of completely natural ingredients such as Testofen - clinnicly shown to raise free testosterone 98%, sugar cane and LJ100 tongkat ali. Testoxyl contains 12% strength of Octacosanol which is derived from 10% natural sugar cane. Thus Testoxyl is completely natural and safe and does not cause any side effects whatsoever. Besides this, Testoxyl helps in raising your overall stamina, strength and vitality. It also helps in increasing your libido which will eventually result in an increased sexual drive. The good thing about Testoxyl is that you will start to experience instant energy and a feeling of power as soon as you start taking it. It is because Testoxyl raises the level of free testosterone in your body by as much as %!