Skin ages faster when damaged mitochondria pile up, and mitophagy, the cleanup of those faulty mitochondria, is supported by cutting oxidative stress and by urolithin A, which only about 40% of people can make on their own.

• What to do: Lower the oxidative stress inside your cells: eat fewer processed foods, limit chronic UV exposure, sleep enough, manage stress, strength train and keep vitamin D and omega 3 levels in check.
• Why it matters: Mitochondria produce the energy your skin needs, and they get injured by aging, insulin resistance, inflammation, sun damage and poor diet. Damaged ones take up space and make cells work worse.
• How to apply it: Add polyphenols such as EGCG from green tea and cocoa flavanols, plus carotenoids such as astaxanthin and beta carotene, which help reduce the oxidative burden that mitophagy depends on.
• Tools: Urolithin A, available as oral and topical products, and a supplement whose dose has been studied. Choose products with third party testing that shows an adequate amount.
• Metrics: Urolithin A has been linked in research to lower CRP, a marker of inflammation.
• Risks: Taking too many carotenoids can turn the skin orange, as in the tan maxing trend.
• Exceptions: Foods like walnuts and pomegranate give urolithin A only if your gut bacteria can convert them, and antibiotics can wipe out those bacteria.

Most curly hair rules improve how a curl looks, not how healthy the hair or scalp is, so the only rules worth keeping strict are washing according to your scalp, detangling gently and seeing a dermatologist when your part widens.

• What to do: Wash when your scalp is oily, itchy, flaky, sweaty or full of buildup, which for this dermatologist means about twice a week. Detangle damp, conditioned hair from the ends up and keep heat moderate with a heat protectant.
• Why it matters: Curls and scalp need different things. Curls need gentleness, while the scalp keeps producing oil, sweat and dead skin and collects product buildup. Breakage and hair loss also need different treatments.
• How to apply it: Treat styling products as optional. Shampoo and conditioner are the basic maintenance, and heat protection matters only if you use heat. Keep the diffuser moving and use a curling wand only occasionally.
• Metrics: Watch for a wider hair part, a thinner ponytail, more visible scalp under overhead light, bald patches or sudden heavy shedding.
• Tools: Diffuser, heat protectant, a clarifying shampoo when hard water leaves mineral buildup, and light sprays, mousses or gels for definition.
• Risks: Washing day shedding looks dramatic on curly hair because it traps a week of normal shedding. Buying another serum for real hair loss delays the right diagnosis.
• Exceptions: With seborrheic dermatitis, calming scalp inflammation matters more than preserving the curl pattern.

Colossal made its dire wolves by engineering 20 edits, chosen from fossil dire wolf genomes, into a gray wolf genome, because the goal is to recreate traits that fill an ecological niche, not to copy every letter of extinct DNA.

• What to do: Judge de-extinction claims by function, meaning which edited traits reproduce an animal's role in its ecosystem, and not by a rigid genetic similarity threshold.
• Why it matters: The same toolkit of genome editing, cloning and stem cell technology is already used for living species, such as cloned red wolves, black footed ferrets and cane toad resistant quolls.
• How to apply it: Before backing any release project, look for safety first checks (animal welfare, edits already proven safe in living dogs), local advisory panels and an ecological case, like the care reports Colossal publishes.
• Metrics: Mammoths and Asian elephants are about 99% similar, the oldest recovered DNA is 1 to 2 million years old, and elephant gestation takes 22 months.
• Tools: Somatic cell nuclear transfer cloning, multiplex genome editing, iPS cells from wild animals, gene drives and artificial wombs, plus the episode sponsors Joovv, Eight Sleep, AG1 Pro and Function.
• Risks: Introduced species and gene drives can backfire, birds cannot be cloned by nuclear transfer, and inbreeding shrinks genetic diversity.
• Exceptions: Dinosaurs cannot be revived because DNA breaks down long before 66 million years.

Skin loses its bounce after menopause because the deep layer (collagen, elastin) and the surface layer (lipids and water) decline at the same time, so a collagen cream alone fails and you need a three part plan: support, stimulate and protect.

• What to do: Use a targeted serum with peptides or growth factors plus a moisturizer with glycerin, use a retinoid at night, exfoliate on a separate night and wear zinc oxide sunscreen daily.
• Why it matters: UV creates oxidative stress that switches on enzymes that break down collagen, so ignoring sunscreen cancels everything else you stimulate.
• How to apply it: Morning: serum, moisturizer, sunscreen. Night: serum, retinoid on select nights, moisturizer. Give the flash mask its own night and leave it on for 10 to 15 minutes.
• Metrics: Retinol comes in 0.3, 0.5 and 1.0 and the right one is the strength you tolerate consistently. A PDRN cream showed a 45% improvement in barrier strength after one application. Glycolic acid 15% with lactic acid 3% in the mask. Zinc oxide 11% in the sunscreen.
• Tools: Dr. Reju-All PDRN copper peptide serum and cream, Paula's Choice multi-peptide booster, SkinMedica TNS Advanced+, Clarins Double Serum, SkinCeuticals Retinol, Dr. Idriss Major Fade Flash Mask, ISDIN Eryfotona Actinica.
• Risks: Collagen in a cream will not rebuild facial collagen, and exfoliating every night on dry postmenopausal skin can irritate it.
• Exceptions: Growth factor serums can pill, so use them at night, and sleeping in the flash mask only suits skin that is not sensitive.

When a weight loss shot cuts your meals from about 20 bites to 10 or 12, each bite has to carry more nutrition, and one or two bites of liver can match the nutrients in 20 or 30 bites of plant or grain foods.

• What to do: Start every meal with the densest foods first: eggs with the yolk, beef, sardines, salmon, liver, oysters or other shellfish, and plain full fat Greek yogurt or cottage cheese.
• Why it matters: The shots lower appetite and make food less enjoyable, so protein, vitamins, minerals and healthy fats are easy to undereat, which puts muscle, bone and brain function at risk.
• How to apply it: Eat 4 ounces of beef before touching anything else, start the day with one or two eggs, keep tinned sardines with the bones and skin on hand, and use unsweetened yogurt or cottage cheese when cooking smells make you nauseated.
• Tools: If you dislike liver, take 2, 4 or 6 Ancestral Supplements beef liver capsules a day, which the speaker compares to eating 1 to 3 ounces of liver.
• Risks: Filling a smaller stomach with bread, cookies, crackers and candy can lead to deficiencies and to losing muscle and bone along with fat.
• Exceptions: Chicken liver is the mildest option if beef liver is too strong, and goose or duck liver work as well.

Weight regain after a GLP-1 drug is not inevitable, because the hunger that returns is best met by a nutrient dense, animal based diet and strength training started while you are still on the drug, ideally within a 3 to 6 month window at a low dose.

• What to do: Start shifting to a proper human diet now: fatty meat, eggs with the yolk, fish, avocado and broccoli, instead of ultra processed food made of wheat, rice, oats, corn, added sugar and seed oils. Lift heavy things and protect your protein intake.
• Why it matters: These drugs help you lose fat but also muscle, and most regain after stopping is fat tissue. If you ate the same junk food in smaller amounts, the old appetite returns and the weight comes back.
• How to apply it: Treat the medication as a tool for 3 to 6 months at a low dose, especially if BMI is above 35 or A1C is above 10. Use that window to build habits that you can keep for 30 to 60 years, not a temporary hack.
• Risks: No research shows higher doses or long term use are safe in humans. Coaches also warn about a blunted desire for food and other pleasures, and about the drugs masking an unhealthy relationship with food.
• Exceptions: Some people have a real medical reason to use these drugs, so the goal is to ask whether the drug is helping or hurting your long term health goals.

Wall sits cut systolic blood pressure by 11 mmHg and diastolic by 5 in a review of 270 trials and 15,000 people, more than double what walking does, because holding the contraction triggers a nitric oxide surge and an insulin independent glucose uptake in the large leg muscles.

• What to do: Hold a wall sit with thighs parallel to the floor for as long as you can, building to 2 minutes. Do it two to three times per week for about a month, then once a week to maintain.
• Why it matters: Isometrics lowered systolic pressure by 8 mmHg as a category versus about 5 for cardio and resistance training and 4 for intervals. Total work time is only 10 to 12 minutes.
• How to apply it: Do a wall sit 15 to 30 minutes after your highest carbohydrate meal so AMPK pulls glucose into muscle without insulin, then add a walk. At a desk, hold a hand grip at 30% of max for 2 minutes and rest 1 minute.
• Metrics: Under 1 hour per week of isometrics dropped systolic by 10.4 and diastolic by 6.7. In 77 adults off medication, systolic fell 12.9 mmHg in one week, and a year long trial lowered resting heart rate by 4 beats per minute.
• Tools: A hand grip trainer costs 20 to 30 dollars, and a pull up bar allows dead hangs, starting at 15 seconds.
• Exceptions: Grip strength and dead hangs are proxies for whole body function and longevity, not proof that nothing else matters.

Sun protection accounts for about 80% of what you can influence in skin aging, so sunscreen by day, vitamin C in the morning and a retinoid at night beat any supplement, while acne, eczema and psoriasis often trace back to gut health, insulin and hormones.

• What to do: Wear sunscreen daily, use vitamin C in the morning and a retinoid at night, wash and moisturize, and add strength training, omega 3s and a whole food diet low in sugar and dairy.
• Why it matters: UV light is the number one extrinsic driver of skin aging, while sugar, insulin resistance, gut imbalance and falling estrogen add inflammation that breaks down collagen and worsens acne and psoriasis.
• How to apply it: Try a 2 to 3 week elimination of gluten, dairy, sugar and processed food for inflammatory skin problems, ask your doctor to check insulin, thyroid, vitamin D and gut health, and choose mineral sunscreen if chemical filters worry you.
• Metrics: Optimal fasting insulin is under 5, an omega 3 index above 8% is the goal, and the dermatologist says 65% of more than half a million Function Health members have high insulin.
• Tools: Retinol or tretinoin, topical vitamin C, niacinamide, copper peptides, urolithin A (Timeline Mitopure), omega 3s, collagen peptides and Function Health lab tests.
• Risks: Retinoids are not safe in pregnancy, lemon juice irritates skin, chemical sunscreens absorb more into the blood, and exosomes and injectable GHK Cu lack enough safety data.
• Exceptions: Gluten avoidance is strongest for people with positive gluten antibodies, and beef tallow is an overrated skincare trend.

One cup of blueberries a day improves flow mediated dilation by about 1 to 1.5 percentage points, and each extra point is linked to roughly 12% fewer future cardiovascular events, while regular intake is tied to cognitive aging equal to being 1.5 to 2.5 years younger.

• What to do: Eat about one cup of whole fresh or frozen blueberries every day, ideally with a meal or in place of a refined carbohydrate dessert.
• Why it matters: Anthocyanins and the metabolites your gut microbes make from them act as signaling molecules that support nitric oxide, blood vessel function, memory, glucose handling and recovery after hard exercise.
• How to apply it: Add them to yogurt or oatmeal, eat them on their own, or blend them into a smoothie, and aim for a full cup because half a cup did not improve vascular function in a six month trial.
• Metrics: A cup a day improved flow mediated dilation by 1 to 1.5 points, one trial lowered arterial stiffness by 2.24 points, and in insulin resistant adults about two cups improved insulin sensitivity by 22% in one study.
• Risks: Evidence for blood sugar is mixed, since fasting glucose rarely drops and one 8 week replication attempt did not reproduce the insulin sensitivity gain.
• Exceptions: Blending with banana may reduce polyphenol exposure because banana polyphenol oxidase degrades chlorogenic acid and anthocyanins, so the speaker swaps banana for avocado, though no study has tested the effect on blueberry benefits.

About half of men over 50 have low testosterone, and a simple morning blood test, repeated once, can show whether it is behind low energy, poor sleep, low libido or erectile problems that are often fixable.

• What to do: If you notice low energy, low sex drive, poor mood, sleep or concentration, or erectile problems, get a morning blood test for testosterone before 9 or 10 a.m. Repeat it if the first result is low. Consider screening from age 40 to 50, or earlier if you have symptoms.
• Why it matters: The normal range is wide, 300 to 900 ng/dL, and levels fall about 1% a year after 20 to 30. Low levels link with anemia, low bone density and mood. Erectile function is a check engine light for heart health.
• How to apply it: Sleep 7 to 9 hours, lose excess weight, lower stress and cut heavy drinking, because all of these suppress testosterone. If ED persists, ask a doctor about PDE5 pills, urethral gel, injections and other options. If you want children, test both partners.
• Metrics: Testosterone below about 300 ng/dL, 20 or more ejaculations a month linked with 20% lower prostate cancer risk, and PSA screening from your 50s.
• Tools: Gels, injections every two weeks, long acting shots, pellets and oral tablets for testosterone; sildenafil, tadalafil and vardenafil for ED.
• Risks: Testosterone therapy lowers sperm production in about 90% of men, and can cause acne, hair loss, breast growth and higher red blood cell counts. The TRAVERSE trial of about 5,000 men found no higher prostate cancer, heart attack or stroke risk.
• Exceptions: If testosterone is normal, therapy is unlikely to help performance, so do not take it for muscle or sexual performance.