Obstructive sleep apnea can stop or sharply reduce your breathing dozens of times an hour without you remembering it, which is why eight hours in bed can still leave you foggy, with morning headaches and blood pressure that is hard to control.

• What to do: Do not diagnose yourself from a podcast or a smartwatch. If you snore loudly, wake with a dry mouth or headache, or feel exhausted after eight hours, ask your doctor for a home sleep test or a night in a sleep lab.
• Why it matters: Untreated apnea is associated with high blood pressure, atrial fibrillation, heart failure, coronary disease, stroke, insulin resistance, type 2 diabetes and trouble with memory and focus. Mark Hyman describes a patient who lost 50 pounds without trying after starting treatment.
• How to apply it: Use CPAP now and investigate causes at the same time. If the mask leaks or dries your mouth, try a nasal mask or pillows, heated humidity, a heated tube or a different pressure setting. Limit alcohol, stop smoking, review medications such as opioids and treat nasal congestion.
• Metrics: Doctors track the AHI, the apnea hypopnea index, which counts breathing events per hour of sleep. Retest after weight loss or surgery to confirm it improved.
• Tools: Function Health offers over 160 lab tests for $365 a year, including insulin and glucose, useful because thyroid and metabolic problems can contribute.
• Risks: Mouth tape is not a treatment for suspected sleep apnea, and stopping CPAP because you feel better can hide a problem that is still there.
• Exceptions: Being thin or fit does not rule it out, and women often show fatigue, headaches or insomnia instead of loud snoring.

Motivation does not arrive before action: the feeling follows it, so the fix is the 5 second rule, counting 5-4-3-2-1 and moving the instant you hit one, before your brain can talk you out of it.

• What to do: Answer "what do I want from now on?", pick one small action that a person with that life would take, and count backwards 5-4-3-2-1 to start it even if you do not feel like it.
• Why it matters: Hesitation lasts under 5 seconds before you talk yourself out of a choice, and a streak of 21 days is not a habit. The body keeps its capacity to change at any age, even for a person who has never lifted a weight.
• How to apply it: Put the phone and alarm across the room, lay out workout clothes, leave creatine and a protein shot on the counter, pre-pick the workout the night before and keep treats out of the house. Tie your goal to a personal reason, such as protected time for yourself.
• Metrics: Hyman went from 10 push-ups at 50 to about 75 push-ups and 15 pull-ups after starting to lift at 59; The Let Them Theory sold 11 million copies in 19 months.
• Tools: Function Health lab data, a pre-planned workout, an audiobook for walks, and the ABC model (apologize, back off, compliment) to influence others.
• Risks: Pressuring a loved one to lose weight or take medication triggers resistance. Talk to your doctor before starting hormone therapy or changing medication.
• Exceptions: For big decisions such as a contract or a marriage, stop and think. The 5 second rule is for everyday choices you already know are right.

Humans are far more olfactory than they admit: after a handshake people sniff their own hands, and invisible body odor can predict friendship, spread fear and cut men's free testosterone by about 14% within 20 to 30 minutes.

• What to do: Treat smell as a real social channel. Notice the hand-to-face sniffing that follows handshakes and give some weight to first impressions that "just click", because odor similarity predicted how friendly strangers rated each other.
• Why it matters: About 7 million receptors of roughly 350 types feed the olfactory bulb, which connects directly to the amygdala and hypothalamus, so odor can shift arousal, aggression and hormones without conscious awareness.
• How to apply it: Read "pheromone" claims with caution and use the term chemosignals instead. Remember that baby odor (hexadecanal) lowered aggression in men but raised it in women, so the same signal does not act the same way in everyone.
• Metrics: 14% drop in free testosterone after sniffing tears; 15 of 16 people identified digitized violets; a perceptual map of 4,000 molecules.
• Tools: Electronic nose with metal oxide sensors, the Taylor Aggression Paradigm and fMRI.
• Risks: Smell digitization is at the "1956 black and white TV" stage; rose and anise recreations failed, so do not expect products from it soon.
• Exceptions: Odor similarity predicted friendship ratings but not performance in the mirror game, and the tear effect was shown for men sniffing women's tears.

Sauerkraut is not a probiotic: a probiotic is a specific strain with a known genome and clinical or randomized trial evidence, while the live microbes in sauerkraut, kimchi or kombucha are just live microbes, and only some yogurt brands list strains backed by evidence.

• What to do: Pick supplements or yogurts that print the strain name, take them with food and swap products if you notice no change after a trial period. Eat varied fiber and a mix of ferments such as yogurt, kefir, sourdough, tempeh and sauerkraut.
• Why it matters: Strains of the same species can act oppositely (EHEC E. coli vs the harmless E. coli in your gut), and a 37 study review of fermented dairy found benefits for gut symptoms, serum TNF alpha and gut barrier function.
• How to apply it: Store probiotics cool, dry and away from oxygen. If you avoid dairy, use plant-based yogurt, water kefir or kvass, whose microbes also survive in the gut. Treat commercial stool tests as information, and talk to a doctor or dietitian about persistent symptoms.
• Metrics: 37 fermented dairy studies; kimchi vs cabbage over 3 weeks; fecal calprotectin for inflammation and zonulin for gut wall function.
• Tools: Strain labels and the US probiotic guideline; stool tests only to detect pathogens such as C. diff.
• Risks: Wrongly handled food can carry Clostridium botulinum, and washing produce does not remove all pathogens.
• Exceptions: Most microbes pass through rather than settle, so the benefit depends on regular intake.

Robert Greene argues that the sublime is not a rare event but a shift in attention: after about a minute of sustained focus on a single object, as Ouspensky practiced with a vase of flowers, the ordinary starts to look strange and alive, and months of practice changed how he saw whole streets.

• What to do: Practice self remembering. Pick a simple object, look at it for a full minute and tell yourself you will remember this moment. Repeat daily. Greene also meditates for 40 minutes every morning, and says meditation changes brain wiring.
• Why it matters: Splintered attention makes time feel too fast. Greene says childhood felt long because there was empty space between thoughts, and that a constantly interrupted mind is more vulnerable to influence and advertising.
• How to apply it: Keep your phone in a drawer while you work, write by hand when you need deep thinking (Greene filled over 100 notebooks), and spend time with things that are not human: a backyard, the ocean, a mountain, an animal. Experience first and report later, instead of filming everything.
• Tools: Handwriting, meditation, music listened to note by note, and journaling about your earliest memories to find your life's task.
• Risks: Filming a concert or hike splits your attention between living and reporting. Huberman also warns that drugs such as MDMA can attach strong meaning to trivial things.
• Exceptions: Not everyone has a clear childhood seed moment. Greene says finding it can take days or weeks of digging, looking at what you loved and also at what frustrates you.

Fasting feeds Akkermansia, a gut bacterium that eats the intestinal mucus layer, and with no fiber or polyphenols competing for its attention it can overgrow and thin that lining, which fits a Swedish study of about 4,200 people linking high Akkermansia on a low fiber diet to higher type 2 diabetes odds.

• What to do: Stay in the Goldilocks zone. Pair fasting with polyphenol and resistant starch foods such as berries, apple peel and crucifers, and vary your foods instead of repeating the same ones every day.
• Why it matters: Biology follows a U shaped curve, so even a good thing like fasting can drift out of balance over time through accumulation, degradation, attenuation and compensation. Akkermansia is good in balance and harmful when it has only the gut lining to eat.
• How to apply it: Eat foraging style foods the day before a fast (berries, resistant starch, crucifers, lower protein), keep fasts shorter, and treat a small handful of berries during a fast as acceptable. Do not take probiotics daily as a rule. Consider a few weeks only after antibiotics.
• Metrics: About 20 types of mucin are produced in the body. Apple peel carries very long procyanidin chains of roughly 30,000 units. Count calories weekly if at all, not daily.
• Tools: Element 500 mg sodium cans, with 100 mg potassium and 30 mg magnesium, no sugar and no caffeine, sipped through a fast. A CGM and ketone monitor can show how small foods affect you.
• Risks: Repeated long fasts can trigger hyperphagia, a binge urge that grows with a big meal. Daily antioxidants may blunt useful signaling after exercise, and carnivore style diets can raise Akkermansia without fiber to balance it.
• Exceptions: Akkermansia works best when your levels are low. Older adults tend to have more Akkermansia but fewer Bifidobacteria, which can strain the immune system.

GLP-1 medications quiet the constant mental chatter about food that doctors call food noise, and when people stop them, in roughly 60% of the people studied blood sugar, blood pressure and waist circumference climb back up as hunger returns.

• What to do: Treat obesity as a medical condition, not a character flaw. Ask your doctor why you do or do not qualify for a GLP-1, and combine medication with strength training, protein, fiber and a registered dietitian rather than waiting to "earn" treatment.
• Why it matters: Hunger is biology shaped by genes, hormones and environment, so shame does not work. The guest says some antidepressants, antipsychotics and steroids drive appetite, and menopause changes how fat is stored.
• How to apply it: If you feel nauseous or constipated on a GLP-1, aim for 25 g of fiber a day for women and 30 g for men, spread protein and fiber across the day, drink around 1.5 liters of fluid and do not raise the dose until symptoms settle. Struggling to reach your protein minimums usually means the dose is too high.
• Metrics: The new lipid guidelines for 2026 aim for LDL under 100, under 70 if lipoprotein(a) is high, and total cholesterol under 200, with screening from age 30. Roughly 1 in 10 women of reproductive age has PCOS.
• Tools: Cost Plus Drugs buys directly from manufacturers and GoodRx finds the lowest prices. The guest paid about $35 at CVS for Repatha with a GoodRx coupon.
• Risks: Compounded GLP-1s skip the FDA approval process and some are mixed with other ingredients. Stop the drug straight away if you become pregnant, and plan a two month washout before conception.
• Exceptions: Not everyone who asks for a GLP-1 qualifies. Someone with a BMI around 23 and PCOS may do better with metformin or a lower impact option.

You can keep doing hard things by switching between several drivers instead of relying on one, as ultra endurance swimmer Ross Edgley did over a 157 day swim around Great Britain, a 56 hour Yukon swim and 30 marathons in 30 days.

• What to do: Name your spokes before a hard task: because I said I would, fear of letting people down, love, anger, doing it for others, gratitude for what you can do and the absurd hero mindset.
• Why it matters: The anterior mid-cingulate cortex reportedly grows when you do hard things and shrinks when you avoid them, and one driver alone tends to fail during long, painful efforts.
• How to apply it: Focus on the next stroke or step instead of the clock, lower the stakes in your head when pressure builds, protect deep sleep and switch spokes when one fades.
• Metrics: Edgley swam almost 2,000 miles in about 157 days, 317 miles of the Yukon in 56 hours went 70 hours without sleep on the Yukon expedition and uses his pull-up one rep max as a strength reserve.
• Tools: Electrolytes, a glucose wearable, a temperature regulating mattress cover and a protein snack are mentioned as sponsor products, not as part of the model.
• Risks: Motives such as anger or ego can fuel you, but Edgley found records alone felt shallow and sleep loss can drain dopamine and serotonin.
• Exceptions: In ultra endurance an imperfect stroke is fine, while high stakes in precision tasks can overload the motor system and hurt performance.

A family physician with 22 years of practice says a keto carnivore diet, which they call a proper human diet, can heal down to the mitochondrial level and in many cases put severe mental health disorders into complete remission, based on patient stories rather than trials.

• What to do: If you live with anxiety, depression or brain fog, talk to your doctor and consider a time-limited trial of a keto carnivore diet built on meat, eggs and animal fat.
• Why it matters: The physician has seen patients on a handful of medications with side effects such as lost sexual desire, and reports hope returning once they changed how they ate.
• How to apply it: Eat the meat without buying supplements or products, note your mood, anxiety and mental clarity week by week, and do not change psychiatric medication without professional supervision.
• Metrics: Stories in the video include Todd, who describes symptoms gone in three weeks, and a person with schizophrenia discharged within a month or two after decades in an institution.
• Risks: These are testimonies, not controlled studies, so stopping prescribed medication on your own could be harmful.
• Exceptions: The approach is not only a weight loss diet, and people without a formal diagnosis but with constant fog and fatigue are also part of the picture.

Brain scans of people who were overweight or obese looked about 8 years older, and low estrogen, testosterone or thyroid hormone also sped up brain aging, so fixing metabolism, hormones and nutrition can visibly restore brain structure.

• What to do: Treat the brain through the body. Track cardiometabolic health, hormones and nutrients, and add a brain MRI with quantitative analysis plus Alzheimer's blood markers when family history or age 50 to 60 makes them relevant.
• Why it matters: Brain changes can show up about 30 years before Alzheimer's, and around 60% of people diagnosed with dementia have cardiometabolic problems. Scans show recovery after nutrition is restored, as in anorexia, where the brain improved most.
• How to apply it: Get a broad blood panel that includes vitamin D, iron, omega 3, heavy metals, insulin, thyroid, sex hormones, homocysteine and methylmalonic acid, then retest after changes to see your trend.
• Metrics: Alzheimer's incidence doubles every 5 years after age 70, from about 5% at 70 to 10% at 75 and 20% at 80. One APOE4 copy roughly triples risk, and two copies (about 6% of people) raise it 9 to 10 times. Key markers include p tau 217, amyloid beta 42/40, neurofilament light and GFAP.
• Tools: Functional MRI, PET, NeuroQuant brain age and brain charts, plus the Function Health panel. Sponsors named in the episode: Bon Charge red light mask, Paleovalley bars, Timeline Mitopure, Seed DS 01, BiOptimizers magnesium and Fatty15.
• Risks: A single marker or a normal structural MRI can miss the problem, because many psychiatric conditions show up in function, not structure. Imaging is more controversial than blood work.
• Exceptions: Only about 2% of Alzheimer's cases are directly genetic. APOE4 tilts risk but is not destiny, and its effect varies by ancestry.