Energy

Joe Rogan said“Regular sauna sessions can cut your risk of dying and add years to your life.”

The science saysReal but observational. Frequent sauna use is tied to lower mortality in large cohorts, but that is correlation, not proof, and the cold plunge is along for the ride.

Verdict: The sauna science is real. The coffin-dodging guarantee is not.

Tom Brady said“Avoiding nightshade vegetables like tomatoes and peppers lowers inflammation.”

The science saysNo good evidence supports cutting nightshades for inflammation in healthy people. They are nutrient dense, and the TB12 method itself later added them back.

Verdict: Tomatoes are fine. Eat the tomatoes.

Novak Djokovic said“Cutting out gluten transformed my health and my game.”

The science saysRefuted for non-celiacs. A blinded trial in athletes without celiac disease found cutting gluten changed nothing; the gains came from losing weight and cleaning up the diet.

Verdict: A backhand to broscience: blind the bread, and the body never noticed.

Dr. Mehmet Oz said“Green coffee bean extract is a magic weight-loss cure for every body type.”

The science saysRefuted. The only supporting trial was tiny, industry-funded, and later retracted, and the FTC penalized the sponsor.

Verdict: The magic bean's one study vanished faster than the promised pounds.

Liver King said“Eating raw liver and living ancestrally built this physique, naturally.”

The science saysRefuted. There is no evidence raw organ meat beats cooked, it adds infection risk, and he later admitted steroids built his body.

Verdict: The liver didn't build the King. The needle did.

Tom Hanks said“Get back to your high-school weight and you essentially beat type 2 diabetes.”

The science saysSupported. A major trial showed significant weight loss put type 2 diabetes into remission for nearly half of people, with bigger losses doing better.

Verdict: His doctor's one-liner is basically a clinical trial protocol.

Andrew Huberman said“Get sunlight in your eyes first thing and it sets your whole day and night.”

The science saysLargely supported. Light is the master cue for the body clock and morning light shifts it earlier, though the lab studies used brighter, longer light than a quick glance outside.

Verdict: Real clock-setting biology, dosed more precisely than the studies.

Jack Dorsey said“Eating one meal a day and fasting all weekend makes me sharper.”

The science saysMostly unsupported. The closest trial of one-meal-a-day eating found higher blood pressure and worse blood sugar, and the focus boost is untested.

Verdict: One meal a day sharpened his focus and nudged his blood sugar the wrong way.

Cristiano Ronaldo said“I don't touch alcohol, after what it did to my father.”

The science saysSupported. The best modern evidence finds no safe protective level of alcohol, so avoiding it sidesteps a real, dose-dependent risk.

Verdict: There is no safe pour, so the empty glass ages best.

Hugh Jackman said“Sixteen-eight fasting keeps me lean while I build muscle.”

The science saysOverstated. Intermittent fasting works about as well as eating less, with no special edge; the muscle comes from protein and training.

Verdict: The fasting clock didn't carve Wolverine. The protein did.

Dwayne Johnson said“Thousands of calories and big cheat meals fuel this physique.”

The science saysMostly fuel, not magic. Protein helps muscle only up to a point; the rest is energy for elite training, and the cheat-meal-as-engine idea is untested.

Verdict: Eat like a mountain only if you train like one.

Tony Robbins said“A daily cold plunge resets your body and your energy.”

The science saysThin and mixed. The best review of cold-water immersion found mostly short-term, inconsistent effects, even a brief rise in inflammation, with no longevity benefit shown.

Verdict: Great for a 6am dopamine hit. The longevity receipt is still in the freezer.

Rich Roll said“Roll says switching to a whole-food plant-based diet transformed how he felt within a week or two and fueled his endurance career.”

The science saysReasonable: plant-predominant diets are consistently associated with lower cardiovascular and overall mortality in large cohorts, though the dramatic '7 to 10 days' transformation is personal anecdote, not measured outcome.

Verdict: The diet pattern earns its reputation; the one-week miracle is a story, not a study.

Peter Attia said“Attia argues that raising your VO2 max (cardiorespiratory fitness) is one of the most powerful things you can do to lower your risk of dying early.”

The science saysLarge cohort studies consistently link higher cardiorespiratory fitness to substantially lower all-cause mortality.

Verdict: The fitness-mortality link is real and large, but it is association, not proof that raising VO2 max adds years.

Terry Crews said“Crews credits a daily 16:8 intermittent fasting pattern, eating only between 2pm and 10pm, for keeping him lean and feeling great in his 50s.”

The science saysTime-restricted eating can aid weight loss and metabolic markers, but the best reviews find it works mainly by cutting calories, with no clear edge over standard calorie restriction.

Verdict: A workable way to eat less, not a metabolic magic trick: the clock matters less than the calories.

Christie Brinkley said“Brinkley says being vegetarian gives her a lot of energy and reflects an awareness of food as fuel.”

The science saysPlant-based diets are associated with lower heart disease and mortality risk, but the specific claim that they boost personal 'energy' is not directly established.

Verdict: Good for the heart on the data; the 'energy' part is her experience, not a proven effect.

Sting said“Sting says a near-daily morning yoga practice gives him more energy, a calmer mind, and the fitness to keep performing into his 70s.”

The science saysModerate: randomized trials show yoga improves balance, mobility, and vitality in older adults, but nothing about it has been shown to extend lifespan.

Verdict: The flexibility and balance gains are real and well-measured; the fountain-of-youth part is his, not the data's.

Salma Hayek said“Hayek says periodic juice cleanses act like a meditation that resets her health and steers her toward eating better.”

The science saysWeak: there is very little clinical evidence that juice cleanses or 'detoxes' remove toxins or improve health beyond what the body already does.

Verdict: Her body already runs a 24-hour detox for free; the juice mostly buys her a mindset, not a cleanse.

Serena Williams said“Williams says shifting toward a mostly plant-based diet left her feeling no weaker and actually gave her more energy.”

The science saysHealthy plant-based eating patterns are linked in large cohorts to lower cardiovascular and all-cause mortality, though the benefit depends on diet quality rather than the 'plant-based' label.

Verdict: Her plates lean the way the heart data points, even if the energy boost is the part science can't grade for her.

Kourtney Kardashian said“Kardashian says spiking her filtered water with liquid chlorophyll lets her 'multitask' by hydrating while getting nutrients food cannot always supply.”

The science saysA systematic review found only sparse, low-quality human data on chlorophyll supplements; there is no good evidence that adding it to water improves hydration, nutrition or longevity.

Verdict: Harmless and photogenic, but 'nutrients you can't get from food' is doing far more work than the evidence allows.

Jared Leto said“Leto credits two decades of a mostly vegetarian/vegan diet plus good sleep for his health and youthful appearance.”

The science saysMixed but leaning favorable: vegetarian diets track with lower ischemic heart disease risk, though the evidence is observational and 'youthful looks' is not a measurable endpoint.

Verdict: A plant-leaning plate and steady sleep are sensible bets, but neither is a documented fountain of youth.

Megan Fox said“Fox said she drank water mixed with raw apple cider vinegar to cleanse out her system entirely.”

The science saysWeak and mostly refuted: there is no good evidence that apple cider vinegar cleanses the body, and the only weight-related data come from a single small trial.

Verdict: The body detoxes itself through the liver and kidneys, not vinegar, so this is a habit that grades on hope more than evidence.

Warren Buffett said“Buffett argues that because six-year-olds have the lowest death rate, eating like one, including five Coca-Colas a day, is the safest way to live.”

The science saysRefuted: large cohort studies tie regular sugar-sweetened soda to higher, not lower, risk of death and cardiometabolic disease.

Verdict: The joke is great and the longevity is real, but the evidence runs the other way: his diet looks like a habit he survived, not one that helped.

Kelly Clarkson said“Clarkson says reading The Plant Paradox and cutting out lectins fixed her thyroid and autoimmune issues and got her off medication.”

The science saysWeak and largely unsupported: no trials show lectin-free diets treat thyroid or autoimmune disease, and the legumes and whole grains the diet bans are tied to lower mortality.

Verdict: An individual feeling better after a diet change is real, but crediting lectins, and stopping thyroid medicine, runs well ahead of any evidence.

Jerry Seinfeld said“Seinfeld says practicing Transcendental Meditation twice a day, paired with weight training, gives him reliable energy and focus and could improve almost anyone's life.”

The science saysMeditation programs show small-to-moderate benefits for stress, anxiety and blood pressure, but nothing supports the sweeping claim that it can solve anyone's life.

Verdict: A genuine, modestly proven way to calm the system, not a fix for everything.

Jordan Peterson said“Peterson says switching to an all-beef carnivore diet drove dramatic weight loss, better sleep and the lifting of his depression and other symptoms.”

The science saysThese are uncontrolled personal reports; no trials show an all-beef diet treats depression or extends life, and the broader evidence on heavy red-meat intake points the other way.

Verdict: A striking personal anecdote, not evidence that all-meat eating is healthy or therapeutic.

Miranda Kerr said“Kerr says she starts each day with cold-pressed celery juice on an empty stomach followed by a Medical Medium 'Heavy Metal Detox' smoothie.”

The science saysWeak: there is no credible evidence that celery juice or 'detox' smoothies remove heavy metals or toxins, work the liver and kidneys already do.

Verdict: It's a harmless, vitamin-rich drink, but the 'detox' label is marketing, not medicine.

Martha Stewart said“Stewart says drinking homegrown green juice every morning is an essential part of her diet and contributes to her successful aging.”

The science saysEating plenty of vegetables is strongly tied to better health, but juicing them specifically for anti-aging is not supported and the juice loses much of the fiber of whole produce.

Verdict: The vegetables are doing real work; the word anti-aging is doing the marketing.

Kevin Hart said“Hart says running began as preparation for a film role and turned into a permanent lifestyle that keeps him fit.”

The science saysRegular running is consistently associated with lower all-cause and cardiovascular mortality in large cohorts, with meaningful benefit even at modest weekly doses.

Verdict: You don't need to run fast or far to win here: it's the showing-up week after week that does the work.

Zac Efron said“Efron says eating purely vegan changed how his body metabolizes food, turns it into energy and how he sleeps, and was great for his routine.”

The science saysWell-planned plant-based diets are linked to lower heart disease and cancer risk, but the specific metabolism, energy and sleep improvements he describes are individual and not established outcomes.

Verdict: Good for the heart on paper: the energy-and-sleep magic is a personal report, not a proven effect.

Bill Clinton said“Clinton says he adopted a near-vegan, plant-based diet after heart problems to maximize his chances of long-term survival.”

The science saysPlant-predominant diets reliably lower LDL cholesterol and are linked to lower cardiovascular risk, making this a well-founded choice for someone with established heart disease.

Verdict: For a high-risk heart patient, a whole-food plant-based shift is one of the better-supported bets you can make.

Woody Harrelson said“Harrelson says he eats mostly raw vegan because cooked meals make his energy drop.”

The science saysA plant-heavy diet has real benefits, but there is no good evidence that raw food specifically boosts energy, and strict raw diets carry documented nutritional risks.

Verdict: The vegan base is reasonable; the 'raw equals more energy' part is folklore, not physiology.

Kelly Ripa said“Ripa credits a periodic alkaline diet and cleanse, built around green powders and vegetables, with changing her life and how she thinks about food.”

The science saysWeak: any real benefit comes from eating more vegetables, not from an 'alkalizing' effect, because the body tightly regulates blood pH and diet does not meaningfully change it.

Verdict: The vegetables are doing the work her body's pH was never going to outsource to a green powder.

Charlize Theron said“Theron says doing exercise you actually enjoy keeps you fit almost without noticing, and she pairs regular movement with honest eating.”

The science saysStrong and consistent: regular physical activity, at almost any intensity, is repeatedly tied to lower premature mortality in large pooled analyses.

Verdict: Her 'pick movement you enjoy so you actually keep doing it' advice is exactly what the adherence and mortality data reward.

Nick Jonas said“Jonas says that living with type 1 diabetes has not stopped him from training hard, and that hard physical exercise is a normal part of how he lives with the condition.”

The science saysExercise is recommended for people with type 1 diabetes and improves cardiometabolic risk, though it complicates blood sugar control rather than simplifying it, which is exactly the nuance Jonas gestures at.

Verdict: Correct, and unusually honest about the part that is hard.

Kevin Smith said“Smith says that after his near-fatal heart attack he skipped keto and went vegan to lose weight and protect his heart.”

The science saysShifting toward healthful plant-based eating is consistently linked to lower heart-disease risk, and intensive plant-based lifestyle programs have even reversed coronary disease.

Verdict: The heart benefits are real, but it's healthful plant foods and weight loss, not spuds alone, doing the work.

Mike Tyson said“Tyson credits his vegan diet with giving him more stamina and a more positive state of mind.”

The science saysWell-planned plant-based diets can improve some heart and metabolic markers, but there is no solid evidence they boost stamina or mood the way he describes.

Verdict: Good for cholesterol, unproven for the 'tremendous' stamina and mindset boost Tyson describes.

Jennifer Hudson said“Jennifer Hudson says she maintains her weight by controlling portions and balance rather than by depriving herself.”

The science saysPortion size has a real, measurable effect on how much people eat, so controlling it is a sound weight-management strategy.

Verdict: Portions do the heavy lifting: the science backs her plate.

Viola Davis said“Davis says that after a prediabetes diagnosis she changed her diet and exercise, and that lifestyle choices are within a person's power to prevent or manage the condition.”

The science saysLarge randomized trials show that diet and exercise sharply reduce progression from prediabetes to type 2 diabetes.

Verdict: The move she credits is one of the best-tested interventions in all of preventive medicine.

Orlando Bloom said“Bloom says he starts his day with green powders mixed with brain octane oil, a collagen powder for his hair and nails, and protein.”

The science saysCollagen peptides have some trial support for skin, but there is little rigorous evidence that green powders or MCT oil improve hair, nails, brain function, or energy.

Verdict: A tidy, expensive stack that outruns its evidence: mostly harmless, mostly unproven for what it promises.

Richard Branson said“Branson says looking after his body through daily exercise is what gives him the energy to achieve anything.”

The science saysRegular exercise is one of the most reliably supported health habits there is, though the specific claim that it hands you extra energy is real but smaller than the enthusiasm suggests.

Verdict: Right habit, slightly oversold feeling: the body benefits are rock solid, the energy rush is partly expectation.

Elle Macpherson said“Macpherson says eating an alkaline diet keeps her body lighter, cleaner and full of energy.”

The science saysWeak: the body tightly regulates its own blood pH, and systematic reviews find no good evidence that an alkaline diet prevents disease or changes health outcomes.

Verdict: Eating your greens is great; the pH story bolted onto it isn't what makes it work.

Lewis Hamilton said“Hamilton says switching to a fully plant-based diet made him feel physically better than at any point in his life, with higher energy, more strength in the gym, and no bloating.”

The science saysWell-planned plant-based diets are reliably linked to better cholesterol and lower cardiovascular risk, but the specific claims about energy, strength and skin are personal impressions rather than tested outcomes.

Verdict: The heart numbers hold up better than the mirror does.

Phil Mickelson said“Mickelson says a six-day fast on water and coffee acted as a reset that dropped 15 pounds and helped him get his form back.”

The science saysMulti-day water fasting does produce fast weight loss and appears tolerable under supervision, but umbrella reviews find intermittent fasting is no better than ordinary calorie restriction for the outcomes that matter.

Verdict: Real weight came off, but the scale is doing the work, not the clock.

Chris Paul said“Paul says switching to a plant-based diet started as a performance experiment and became permanent because of how his body felt and recovered.”

The science saysPlant-based eating patterns are consistently associated with lower cardiovascular risk in cohort studies, but the evidence that they improve athletic performance or recovery is thin and mostly neutral.

Verdict: Good bet for the heart, unproven as a performance edge.

Gary Brecka said“Brecka presents drinking hydrogen-rich water as a top-tier daily longevity intervention.”

The science saysSmall human trials show a narrow, modest effect on fatigue and short-burst power, and nothing that would justify calling it a longevity intervention.

Verdict: Real chemistry, real small studies, and a marketing claim several sizes too big for both.