<p>Most people think fasting is just about skipping breakfast. But what if 72 hours without food could actually reverse aging?</p><p><br></p><p>In this video, Dave Asprey breaks down what really happens when you fast for 3 days—and why short fasts don’t reach the deep repair zone your body is built for. You’ll learn:</p><p><br></p><p>The 3 critical stages your body passes through during fasting</p><p>How autophagy turns on and begins cellular repair</p><p>What mistakes destroy your progress (like bad refeeding or skipping electrolytes)</p><p>How to properly prepare, fast, and recover safely</p><p>Why fasting can make your mitochondria stronger, your mind sharper, and your cells younger</p><p><br></p><p>*** Dave's Biohacking Holiday Gift Guide | Go to https://daveasprey.com/giftguide/ to explore the full guide. ***</p><p><br></p><p>Timestamps </p><p>0:00 - Why 16-hour fasts don’t reach real fat burning</p><p>0:54 - The myth of aging and what doctors overlook</p><p>1:48 - How modern life damages your mitochondria</p><p>2:48 - How fasting restores your body’s repair mode</p><p>3:39 - Understanding the phases of fasting</p><p>4:58 - Why short fasts cut results short</p><p>5:34 - Day 1 of fasting</p><p>6:45 - Day 2 of fasting</p><p>7:22 - Day 3 of fasting</p><p>8:24 - Common fasting mistakes that harm your body</p><p>9:35 - How to prepare before your fast</p><p>10:31 - The right way to refeed afterward</p><p>11:14 - Listening to your body’s signals and responses</p><p><br></p><p><strong>Thank you to our sponsors! </strong></p><p>-BrainTap | Go to <a href="http://braintap.com/dave" rel="noopener noreferrer" target="_blank">http://braintap.com/dave</a> to get $100 off the BrainTap Power Bundle.</p><p><br></p><p><strong>Resources:</strong>  </p><p>• Dave Asprey's Latest News | Go to <a href="https://daveasprey.com/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/</a> to join <em>Inside Track</em> today. </p><p>• Danger Coffee: <a href="https://dangercoffee.com/discount/dave15" rel="noopener noreferrer" target="_blank">https://dangercoffee.com/discount/dave15</a>  </p><p>• My Daily Supplements: <a href="https://www.shopsuppgradelabs.com/discount/DAVE15" rel="noopener noreferrer" target="_blank">SuppGrade Labs</a> (15% Off)  </p><p>• Favorite Blue Light Blocking Glasses: <a href="https://truedark.com/?coupon-code=DAVEASPREY15&sc-page=shop" rel="noopener noreferrer" target="_blank">TrueDark</a> (15% Off)  </p><p>• Dave Asprey’s BEYOND Conference: <a href="https://beyondconference.com/" rel="noopener noreferrer" target="_blank">https://beyondconference.com</a>  </p><p>• Dave Asprey’s New Book – <em>Heavily Meditated</em>: <a href="https://daveasprey.com/heavily-meditated" rel="noopener noreferrer" target="_blank">https://daveasprey.com/heavily-meditated</a> </p><p>• Upgrade Collective: <a href="https://www.ourupgradecollective.com/" rel="noopener noreferrer" target="_blank">https://www.ourupgradecollective.com</a>  </p><p>• Upgrade Labs: <a href="https://upgradelabs.com/" rel="noopener noreferrer" target="_blank">https://upgradelabs.com</a>  </p><p>• 40 Years of Zen: <a href="https://40yearsofzen.com/" rel="noopener noreferrer" target="_blank">https://40yearsofzen.com</a> </p><p><br></p><p>Connect with Dave Asprey!</p><p>Website: https://daveasprey.com</p><p>TikTok: https://www.tiktok.com/@daveaspreyofficial</p><p>Instagram: https://www.instagram.com/dave.asprey/</p><p>Facebook: https://www.facebook.com/Daveaspreyofficial/</p><p>X: https://x.com/daveasprey</p><p>YouTube: https://www.youtube.com/c/daveaspreybpr</p><p><br></p><p><br></p><p>The Human Upgrade Podcast: </p><p>Instagram: https://www.instagram.com/TheHumanUpgradePodcast/ </p><p>Facebook: https://m.facebook.com/Thehumanupgrade/</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>