You've heard about them, but do you how they work? Or why they suck? Hank explains the science behind performance enhancers, including steroids, blood doping, and that stuff supposedly made out of deer antlers. You'll never look at cheating the same way again! ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: dftba.com/artist/52/SciShow Or help support us by subscribing to our page on Subbable: subbable.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Thanks Tank Tumblr: thankstank.tumblr.com Sources: www.mayoclinic.com/health/growth-hormone/HA00030 www.businessinsider.com/what-is-deer-antler-spray-2013-5 www.scientificamerican.com/article.cfm?id=is-human-growth-hormone-t www.thedailybeast.com/newsweek/2008/02/16/myth-meets-science.html www.nytimes.com/2006/08/20/sports/playmagazine/20hgh.html www.insidefitness.co.za/?p=1007 www.ncbi.nlm.nih.gov/pmc/articles/PMC2657499/ www.ncbi.nlm.nih.gov/pubmed/20020365 www.hhs.gov/asl/testify/2012/12/t20121212a.html www.mayoclinic.com/health/performance-enhancing-drugs/HQ01105 www.theguardian.com/sport/2013/feb/15/performance-enhancing-substances-blood-boosters www.health.harvard.edu/newsletters/Harvard_Mens_Health_Watch/2010/May/growth-hormone-athletic-performance-and-aging www.garvan.org.au/news-events/news/first-scientific-study-showing-effects-of-growth-hormone-on-athletes.html www.livescience.com/32601-does-human-growth-hormone-really-help-athletes.html www.nature.com/news/performance-enhancement-superhuman-athletes-1.11029 sitn.hms.harvard.edu/sitnflash_wp/2013/02/issue135a/ pediatrics.aappublications.org/content/117/3/e577.full www.nytimes.com/2013/01/30/sports/igf-1-has-long-been-banned-as-performance-enhancer.html news.nationalgeographic.com/news/2013/01/130130-deer-velvet-antler-spray-science-health-football-sports/ blogs.wsj.com/health/2009/05/08/understanding-hcg-the-drug-that-got-manny-ramirez-in-hot-water/

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