When researching the testosterone video, I noticed a common theme: men often bought Viagra assuming it was exogenous T. In this video, Dr. Rohin Francis and I break down how erectile dysfunction works and what’s up with Viagra’s efficacy. Subscribe to Medlife Crisis: https://www.youtube.com/channel/UCgRBRE1DUP2w7HTH9j_L4OQ You may have also noticed that I used annotations for sources in this video. It’s something I’d like to do more of in order to earn your trust. I research each of these videos in depth and want to make everything as accurate as possible, and provide you with the sources so you can read more into things. SOURCES 1. Physical Activity to Improve Erectile Dysfunction: a Systematic Review of Intervention Studies (2018) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5960035/ 2. Massachusetts Male Aging Study (1994) for American Statistic https://www.ncbi.nlm.nih.gov/pubmed/8254833 German ED Comparison, physiology of erections (2002) https://www.researchgate.net/publication/307638771_Gresser_Gleiter_PDE-5-Hemmer_EurJMedRes_2002?enrichId=rgreq-9bbaff00657b169893eff4e5dcb2c0ac-XXX&enrichSource=Y292ZXJQYWdlOzMwNzYzODc3MTtBUzo0MDMyMjEyMjM4ODY4NTBAMTQ3MzE0NjgzOTkxOA%3D%3D&el=1_x_2&_esc=publicationCoverPdf 3. 10% of impotent men seek treatment https://www.nytimes.com/1998/03/28/us/us-approves-sale-of-impotence-pill-huge-market-seen.html 4. 2017 Guardian article. Viagra use in the UK statistics https://www.theguardian.com/lifeandstyle/2017/aug/11/viagra-prescriptions-on-nhs-triple-in-10-years-as-stigma-fades 5. Paper presented on screen. JAMA (2005) https://jamanetwork.com/journals/jama/fullarticle/202047 6. Slidenafil Citrate Drugs.com https://www.drugs.com/monograph/sildenafil-citrate.html Overall cardiovascular profile of slidenafil citrate (1999) https://www.sciencedirect.com/science/article/pii/S0002914999000466 7. 64% of men… https://www.jwatch.org/jw198803220000002/1988/03/22/penile-brachial-pressure-index-noninvasive 8. Exercise prescriptions for ED treatment Heart https://heart.bmj.com/content/105/2/160?hwoasp=authn%3A1549644658%3A4073202%3A168117551%3A0%3A0%3AZ9rweBTxAeOhe9q0X1OV3w%3D%3D Further recommended reading: JAMA (2011) https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/archinternmed.2011.440 EHJ https://academic.oup.com/eurheartj/article/34/27/2034/440049 ___ FOLLOW ME ON: Instagram: @patrickkelly_ Twitter: @patkellyteaches FOLLOW Rohin on Instagram: instagram.com/medcrisis Twitter: twitter.com/medcrisis ___ MUSIC Epidemic Sound Written, filmed, edited, hosted, and graphics by Patrick Kelly All photos from Wikimedia Commons, Pixabay, Pexel, and PublicDomainPictures. Shot with Canon 80D, RODE Shotgun mic, and edited with Adobe Creative Cloud