A lot of myths surround injectable hGH and its effects on athletes. Here are some risks you should be aware of. If you buy what may be called "growth hormone," "growth stimulator" or "growth factors" online, it's likely they're not really hGH. Many websites claim to be selling growth hormone, but they're really selling amino acids that don't significantly increase growth hormone levels in your body. Also there's a risk of contracting HIV or other diseases (like hepatitis) if people share needles, because human growth hormone can only be injected, like many steroids.
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.