This week's stories:&nbsp;*Bartonella Hides in Cat Scratches — and It Might Be Why You Feel Like Garbage&nbsp;A stealth bacterial infection transmitted by everyday cat scratches and flea dirt has been quietly linked to chronic fatigue, brain fog, and neurological symptoms for decades. Dave breaks down how Bartonella slips past standard testing, why&nbsp;it's&nbsp;almost never&nbsp;on a conventional&nbsp;doctor's&nbsp;radar, and the specific PCR protocol you need to&nbsp;actually find&nbsp;it.&nbsp;Sources:&nbsp;<ul><li><a href="https://pubmed.ncbi.nlm.nih.gov/" rel="noopener noreferrer" target="_blank">https://pubmed.ncbi.nlm.nih.gov/</a>&nbsp;</li></ul>&nbsp;*High Tyrosine Levels May Be Cutting Years Off Men's Lives&nbsp;A Mendelian randomization study of 270,000 UK Biobank participants found that elevated tyrosine is causally linked to&nbsp;nearly a&nbsp;full year of lost lifespan in men — with zero effect in women. The culprit&nbsp;appears to be&nbsp;an inflammatory oxidation pathway that men metabolize very differently. Dave examines what this means for every guy stacking L-tyrosine nootropics or eating high-protein keto.&nbsp;Sources:&nbsp;<ul><li><a href="https://pubmed.ncbi.nlm.nih.gov/41045493/" rel="noopener noreferrer" target="_blank">https://pubmed.ncbi.nlm.nih.gov/41045493/</a>&nbsp;</li><li><a href="https://www.aging-us.com/news-room/high-tyrosine-levels-linked-to-shorter-lifespan-in-men" rel="noopener noreferrer" target="_blank">https://www.aging-us.com/news-room/high-tyrosine-levels-linked-to-shorter-lifespan-in-men</a>&nbsp;</li><li><a href="https://www.usnews.com/news/health-news/articles/2026-02-27/study-suggests-one-common-amino-acid-may-affect-how-long-men-live" rel="noopener noreferrer" target="_blank">https://www.usnews.com/news/health-news/articles/2026-02-27/study-suggests-one-common-amino-acid-may-affect-how-long-men-live</a>&nbsp;</li></ul>&nbsp;*Blue Light Blocking Contact Lenses Are a Legitimate Vision Upgrade&nbsp;ALTIUS Vision's tinted contact lenses&nbsp;aren't&nbsp;just blue light filters — they cut chromatic aberration by 53% and improve motion tracking and contrast sensitivity in ways that software filters simply&nbsp;can't&nbsp;replicate. Dave covers the mechanism, who&nbsp;benefits&nbsp;most (screen workers, TBI recovery, gamers), and how to find a provider.&nbsp;Sources:&nbsp;<ul><li><a href="https://altiusvision.com/chromatic-aberration/" rel="noopener noreferrer" target="_blank">https://altiusvision.com/chromatic-aberration/</a>&nbsp;</li><li><a href="https://altiusvision.com/science-of-altius/" rel="noopener noreferrer" target="_blank">https://altiusvision.com/science-of-altius/</a>&nbsp;</li><li><a href="https://www.westvalleyvision.com/-altius--performance-tinted-contact-lenses" rel="noopener noreferrer" target="_blank">https://www.westvalleyvision.com/-altius--performance-tinted-contact-lenses</a>&nbsp;</li></ul>&nbsp;*Taurine Plus B Vitamins Actually Moves the Needle on Motivation&nbsp;A randomized crossover trial found that a daily stack of taurine, B6, folate, and B12 sustained effort-reward motivation and cut cognitive lapses significantly compared to placebo — and the mechanism runs through glutathione production in brain astrocytes. Dave breaks down why this combo works when either ingredient alone&nbsp;doesn't.&nbsp;Sources:&nbsp;<ul><li><a href="https://pubmed.ncbi.nlm.nih.gov/41889717/" rel="noopener noreferrer" target="_blank">https://pubmed.ncbi.nlm.nih.gov/41889717/</a>&nbsp;</li><li><a href="https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1711478/full" rel="noopener noreferrer" target="_blank">https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1711478/full</a>&nbsp;</li><li><a href="https://www.nutraingredients.com/Article/2026/03/23/taurine-and-b-vitamins-bost-motivation-and-focus/" rel="noopener noreferrer" target="_blank">https://www.nutraingredients.com/Article/2026/03/23/taurine-and-b-vitamins-bost-motivation-and-focus/</a>&nbsp;</li></ul>&nbsp;*30 Seconds of Smelling Flowers Resets Your Nervous System&nbsp;Research out of the Monell Chemical Senses Center confirms what your grandmother knew: a slow, deep floral inhale measurably lowers heart rate and activates the parasympathetic nervous system — and it works because olfaction bypasses the cortex entirely and hits the limbic system directly. Dave makes the case for building a daily scent ritual.&nbsp;Sources:&nbsp;<ul><li><a href="https://time.com/" rel="noopener noreferrer" target="_blank">https://time.com/</a>&nbsp;</li><li><a href="https://www.southtabor.com/healthy-living-tip-stop-and-smell-the-flowers/" rel="noopener noreferrer" target="_blank">https://www.southtabor.com/healthy-living-tip-stop-and-smell-the-flowers/</a>&nbsp;</li></ul>&nbsp;This episode is designed for biohackers, longevity seekers, and high-performance listeners who want mechanism-level clarity on infection-driven cognitive decline, amino acid optimization, sensory performance, and evidence-based supplementation. Host Dave Asprey connects emerging clinical research, Mendelian randomization data, and real-world protocols into actionable frameworks for extending&nbsp;healthspan&nbsp;and sharpening performance.&nbsp;New episodes every Tuesday, Thursday, Friday, and Sunday.&nbsp;Keywords: Bartonella cat scratch infection, Bartonella brain fog chronic fatigue, stealth bacterial infection biohacking, tyrosine lifespan men, L-tyrosine risk men longevity, Mendelian randomization amino acid aging, blue light blocking contacts, ALTIUS vision chromatic aberration, performance contact lenses TBI, taurine B vitamins motivation RCT, taurine folate brain health, glutathione astrocytes focus, smelling flowers heart rate stress, olfaction parasympathetic nervous system, floral scent limbic system, biohacking news, longevity research 2026&nbsp;Thank you to our sponsors!&nbsp;&nbsp;-&nbsp;GOT MOLD? | Go to&nbsp;<a href="http://gotmold.com/shop" rel="noopener noreferrer" target="_blank">http://gotmold.com/shop</a>&nbsp;and use DAVE10 to save 10% and see&nbsp;what’s&nbsp;in your air.&nbsp;-&nbsp;MASA Chips | Go to&nbsp;<a href="https://www.masachips.com/DAVEASPREY" rel="noopener noreferrer" target="_blank">https://www.masachips.com/DAVEASPREY</a>&nbsp;and use code DAVEASPREY for 25% off your first order.&nbsp;-&nbsp;iRestore&nbsp;| Grow thicker, healthier hair back naturally. Use code DAVE at&nbsp;<a href="http://irestore.com/" rel="noopener noreferrer" target="_blank">irestore.com</a>.&nbsp;Resources:&nbsp;&nbsp;&nbsp;• Get My 2026 Clean Nicotine Roadmap | Enroll for free at&nbsp;<a href="https://daveasprey.com/2026-clean-nicotine-roadmap/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/2026-clean-nicotine-roadmap/</a>&nbsp;• Get My 2026 Biohacking Trends Report:&nbsp;<a href="https://daveasprey.com/2026-biohacking-trends-report/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/2026-biohacking-trends-report/</a>&nbsp;• Dave Asprey's Latest News | Go to&nbsp;<a href="https://daveasprey.com/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/</a>&nbsp;to&nbsp;join&nbsp;Inside Track&nbsp;today.&nbsp;&nbsp;• Danger Coffee:&nbsp;<a href="https://dangercoffee.com/discount/dave15" rel="noopener noreferrer" target="_blank">https://dangercoffee.com/discount/dave15</a>&nbsp;&nbsp;&nbsp;• My Daily Supplements:&nbsp;<a href="https://www.shopsuppgradelabs.com/discount/DAVE15" rel="noopener noreferrer" target="_blank">SuppGrade Labs</a>&nbsp;(15% Off)&nbsp;&nbsp;&nbsp;• Favorite Blue Light Blocking Glasses:&nbsp;<a href="https://truedark.com/?coupon-code=DAVEASPREY15&sc-page=shop" rel="noopener noreferrer" target="_blank">TrueDark</a>&nbsp;(15% Off)&nbsp;&nbsp;&nbsp;• Dave Asprey’s BEYOND Conference:&nbsp;<a href="https://beyondconference.com/" rel="noopener noreferrer" target="_blank">https://beyondconference.com</a>&nbsp;&nbsp;&nbsp;• Dave Asprey’s New Book –&nbsp;Heavily Meditated:&nbsp;<a href="https://daveasprey.com/heavily-meditated" rel="noopener noreferrer" target="_blank">https://daveasprey.com/heavily-meditated</a>&nbsp;&nbsp;• Join My Substack (Live Access&nbsp;To&nbsp;Podcast Recordings):&nbsp;<a href="https://substack.daveasprey.com/" rel="noopener noreferrer" target="_blank">https://substack.daveasprey.com/</a>&nbsp;• Upgrade Labs:&nbsp;<a href="https://upgradelabs.com/" rel="noopener noreferrer" target="_blank">https://upgradelabs.com</a>&nbsp;&nbsp;&nbsp;&nbsp;Timestamps:&nbsp;00:00 –&nbsp;Intro&nbsp;00:37 – Bartonella & Cat Scratch Disease&nbsp;02:06 – Tyrosine & Lifespan in Men&nbsp;03:37 – Tinted Contacts & Visual Processing&nbsp;05:56 – Taurine & Motivation&nbsp;07:25 – Floral Scent & Nervous System Reset&nbsp;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>.

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