In this episode, Dr. David Sinclair and co-host Matthew LaPlante discuss why we age. In doing so, they discuss organisms that have extreme longevity, the genes that control aging (mTOR, AMPK, Sirtuins), the role of sirtuin proteins as epigenetic regulators of aging, the process of "ex-differentiation" in which cells begin to lose their identity, and how all of this makes up the "Information Theory of Aging", and the difference between "biological age" and "chronological age" and how we can measure biological age through DNA methylation clocks.Thank you to our sponsors: Athletic Greens - https://athleticgreens.com/sinclair InsideTracker - https://insidetracker.com/sinclair Levels - https://levels.link/sinclairOur Patreon page: https://www.patreon.com/davidsinclair Lifespan book: https://amzn.to/3sUqurTDr. David Sinclair Social: Instagram Twitter FacebookTo stay up to date with David's work to democratize biological age testing and insights, visit tallyhealth.com.Matthew LaPlante's Social: TwitterTimestamps:(((((((((((((((((For the full show notes, including the peer-reviewed studies, visit the Lifespan podcast website.Please note that Lifespan with Dr. David Sinclair is distinct from Dr. Sinclair's teaching and research roles at Harvard Medical School. The information provided in this show is not medical advice, nor should it be taken or applied as a replacement for medical advice. The Lifespan with Dr. David Sinclair podcast, its employees, guests and affiliates assume no liability for the application of the information discussed.Special thanks to our research assistants, Adiv Johnson & Sarah Ryan.