Semen Switch, Chewing Gum, Creatine Cheat, Cancer Plants, and Bedtime Risk : 1467

One Creatine Dose Kept Sleep-Deprived Brains 12% Sharper A randomized, double-blind crossover trial kept 29 healthy adults awake for 21 hours straight ... half the time on a single moderate dose of creatine (~14g), half the time on placebo ... and found the creatine group held on to up to 12% more cognitive performance across logic, reaction time, and language processing. Host Dave Asprey breaks down why sleep deprivation is just another form of brain energy stress, how creatine's phosphate-buffering mechanism stabilizes ATP in the prefrontal cortex under pressure, and why this changes how he thinks about red-eye flights and all-nighters. Vegetarians and women showed the largest effects ... your baseline diet sets your ceiling. Sources: Your Gum Is Dosing You With Thousands of Microplastics A pilot study tested 10 commercial gums ... five synthetic, five marketed as natural or plastic-free ... and found every single one shed hundreds to roughly 3,000 microplastic fragments per stick into saliva, with no meaningful difference between synthetic and "natural" varieties. Host Dave Asprey connects this to total toxic load management, explains why "natural" label claims mean nothing without polymer-free verification, and makes the case that even innocent daily habits contribute to the cumulative plastic burden most people aren't tracking. The takeaway isn't panic ... it's precision. Sources: Irregular Bedtimes in Your 40s May Double Heart Attack Risk Finnish researchers followed 3,231 people from age 46 using objective accelerometer data and tracked cardiovascular outcomes for a decade ... finding that people with highly irregular bedtimes, especially combined with short sleep, had roughly double the risk of major cardiovascular events compared to those with consistent sleep timing. Host Dave Asprey explains why your vascular biology runs on a precise circadian schedule, why ambitious, otherwise-healthy people are most at risk of ignoring this lever, and why a 90-minute bedtime window ... protected even on weekends ... may be one of the cheapest cardiovascular interventions available. It'snot just how much you sleep. It's when. Sources: Scientists Decode the Plant Molecule That Kills Cancer Cells in the Lab UBC researchers published a chromosome-level genome map of Mitragyna parvifolia ... a kratom relative ... and used it to decode the full biosynthetic pathway for mitraphylline, a rare alkaloid that has shown real anti-tumor activity in cell and animal models but has never been producible at clinical scale. Host Dave Asprey explains why this is the same early chapter that vincristine and paclitaxel were in before becoming mainstream chemotherapy, draws a hard line between this pipeline story and influencer narratives about kratom as a cancer treatment, and breaks down what it actually means when researchers crack a plant's genetic recipe for a bioactive compound. Nature has been solving cancer for millions of years... we're finally learning to read it. Sources: Scientists Built an On/Off Switch for Sperm Production — No Hormones Cornell researchers used a small-molecule inhibitor called JQ1 to pharmacologically shut down sperm production in male mice for the duration of treatment, then stopped the drug and watched full fertility restore... with healthy offspring and no detectable genomic damage. Host Dave Asprey breaks down the BRDT mechanism that makes this work without touching testosterone or hormones, explains why this is a proof-of-concept rather than a near-market drug, and outlines the questions that need answering before this moves to humans: long-term testicular health, epigenetic marks in recovered sperm, and mood and testosterone interaction over time. The era of precision male reproductive biology is just beginning. Sources: This episode is designed for biohackers, longevity seekers, and high-performance listeners who want mechanism-level clarity on cognitive performance, toxic load management, circadian biology, plant-derived drug discovery, and the future of male reproductive medicine. Host Dave Asprey connects emerging clinical research, objective epidemiological data, and real-world optimization protocols into actionable frameworks for extending healthspan, sharpening performance, and staying ahead of the science. New episodes every Tuesday, Thursday, Friday, and Sunday. Keywords: creatine sleep deprivation cognition, brain energy ATP creatine, microplastics chewing gum, natural gum microplastics, toxic load biohacking, irregular bedtime heart attack risk, circadian rhythm cardiovascular, sleep timing heart health, mitraphylline cancer compound, kratom plant alkaloid drug discovery, oncolytic plant molecule, male birth control non-hormonal, sperm production reversible, BRDT JQ1 contraception, biohacking news 2026, longevity research, performance optimization, healthspanextension Thank you to our sponsors! - KILLSwitch | If you’re ready for the best sleep of your life, order now at and use code DAVE for 20% off - ALP | Head to and use code DAVE for 20% off your first order - iRestore | Reverse hair loss at and get exclusive savings on the iRestore Elite, use code DAVE Resources: • Get My 2026 Clean Nicotine Roadmap | Enroll for free at • Get My 2026 Biohacking Trends Report: • Dave Asprey's Latest News | Go to to join Inside Track today. • Danger Coffee: • My Daily Supplements: SuppGrade Labs (15% Off) • Favorite Blue Light Blocking Glasses: TrueDark (15% Off) • Dave Asprey’s BEYOND Conference: • Dave Asprey’s New Book – Heavily Meditated : • Join My Substack (Live Access To Podcast Recordings): • Upgrade Labs: Timestamps: 00:00 – Intro 00:36 – Fluoride Correction 01:14 – Story 1: Creatine & Sleep Deprivation 03:21 – Story 2: Microplastics in Gum 04:53 – Story 3: Irregular Bedtimes & Heart Risk 06:31 – Story 4: Kratom Plant & Cancer Research 08:18 – Story 5: Male Contraception On/Off Switch 10:02 – Wrap-Up See Privacy Policy at and California Privacy Notice at .

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Semen Switch, Chewing Gum, Creatine Cheat, Cancer Plants, and Bedtime Risk : 1467 is an episode from Bulletproof Radio by Dave Asprey.

This episode is 00:10:50 long.

This episode was published on May 15, 2026.

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