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. 
In Brazil the bodybuilding population is not nearly as educated on steroid use as in other parts of the world. As a result, most end up injecting themselves with something called Synthol, a lethal mixture of oil and alcohol that essentially inflates a user’s muscles. Users of Synthol are extremely susceptible to infections, abscesses, amputations and ultimately death. When cut open to treat an abscess, oil and pus are the two most common things found within; and that’s in those lucky enough to survive. Many Brazilians have died due to muscles literally exploding, causing massive blood loss, or from serious infection that kills them before the area can be cleaned out or amputated.