Try TrueDark glasses: https://truedark.comTry Danger Coffee: https://dangercoffee.com/Try Suppgrade Labs: https://shopsuppgradelabs.com/Over the last 15 years, I’ve built companies and spent millions testing what actually upgrades human performance, and I can tell you that mental fatigue has absolutely nothing to do with willpower. In this video, I break down the exact neurochemistry of deep focus. When your brain runs out of dopamine, norepinephrine, and acetylcholine, or gets bogged down by oxidative stress, your executive function collapses. The pharmaceutical industry wants you hooked on expensive stimulants that only treat the symptoms, but the real biological fix is a common antioxidant: Vitamin C.I explain how your brain hoards Vitamin C at levels 100 times higher than your blood, how to bypass the blood-brain barrier using SVCT2 transporters, and why eating sugar before you take it completely blocks its absorption. You'll also learn the exact biohacking stack—including NAC, CoQ10, PQQ, and L-theanine—you need to recycle this molecule, protect your mitochondria, and maintain effortless, razor-sharp focus all day long.Thank you to our sponsors!-KILLSwitch | If you’re ready for the best sleep of your life, order now at&nbsp;<a href="https://www.switchsupplements.com/" rel="noopener noreferrer" target="_blank">https://www.switchsupplements.com/</a>and use code DAVE for 20% off-Viome | Check it out at viome.com and use code 10DAVE for 10% off. It’s time to stop guessing and start knowing your body.-iRestore | Reverse hair loss at&nbsp;<a href="http://www.irestore.com/DAVE" rel="noopener noreferrer" target="_blank">www.irestore.com/DAVE</a>&nbsp;and get exclusive savings on the iRestore Elite, use code DAVETimestamps:00:00 – Trailer00:21 – Focus Is Biology01:53 – Brain Chemistry Explained05:33 – Vitamin C Revealed07:09 – How to Dose08:18 – Absorption Barriers09:31 – Optimize Uptake10:00 – Oxidative Stress Problem11:00 – Stack for Deeper FocusConnect with Dave Asprey!Website: https://daveasprey.comTikTok: https://www.tiktok.com/@daveaspreyofficialInstagram: https://www.instagram.com/dave.asprey/Facebook: https://www.facebook.com/Daveaspreyofficial/X: https://x.com/daveaspreyYouTube: https://www.youtube.com/c/daveaspreybprThe Human Upgrade Podcast: https://www.instagram.com/TheHumanUpgradePodcast/ https://m.facebook.com/Thehumanupgrade/Danger Coffee: https://dangercoffee.com/DAVE15Dave Asprey’s BEYOND Conference: https://beyondconference.com/Dave Asprey’s New Book - Heavily Meditated: https://daveasprey.com/heavily-meditated/Dave's favorite supplements: https://www.shopsuppgradelabs.com/discount/DAVE15Upgrade Labs: https://upgradelabs.com40 Years of Zen: https://40yearsofzen.comSee 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>.

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