Steroids are synthetically created hormones most commonly used to treat medical conditions such as anemia and asthma. They can also be injected or taken orally to increase muscle mass in bodybuilders or those looking to gain greater athletic performance. It should be noted, however, that steroids can have long-term consequences on the body like skin problems, weakened immune system and possibly even organ damage. In some cases they are even linked with depression and addiction. Those wishing to use steroids should first consult a doctor to assess any potential harm it could cause and weigh that against the benefits of taking them.