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Five longevity claims.
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Rapamycin extends mouse lifespan 9–14%
NAD+ precursors reverse aging in humans
Blue-light glasses improve sleep quality
Walking 10 min after meals blunts glucose
Verdict change — caffeine half-life downgraded

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Because we actually read the papers.

© 2026 Whalespan. Independent, evidence-graded longevity.

222 ‒ How nutrition impacts longevity | Matt Kaeberlein, Ph.D. — Whalespan

Content›Video›222 ‒ How nutrition impacts …

222 ‒ How nutrition impacts longevity | Matt Kaeberlein, Ph.D.

Peter Attia2h 44m · 2022-09-12

Claims Made

281

Claims Supported

158

Support Rate

56%

Support rate

158 of 281 claims supported

158 supported123 partial / not

Claims from this content

210

✓Well SupportedIndividuals should choose a time-restricted feeding schedule that they can consistently adhere to most days, as they tend to underestimate their actual feeding window.✓Well SupportedPharmacologic inhibition of mTOR with rapamycin or its analogs shows promise for lifespan and healthspan improvement, even when initiated late in life.✓Well SupportedPeter Attia structures his daily protein intake across two meals and two protein-focused snacks.✓Well SupportedConsuming more than approximately 0.25 grams of protein per pound in a single sitting may lead to protein oxidation rather than utilization for muscle protein synthesis.Well Supported

More from Peter Attia

Peter Attia on Zone 2 Cardio

Peter Attia on Rapamycin (with Matt Kaeberlein)

Attia walks back the clinic protocol: too aggressive for healthy adults

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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

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✓

Transient or partial cellular reprogramming is an area of aging research that helps understand how cells change state and function.

◐Partially SupportedThe difference between rapamycin's immunosuppressive and geroprotective effects is likely due to dosage and frequency.

✓Well SupportedStrength training and protein ingestion independently increase muscle protein synthesis, and performing both together stacks these benefits.

✓Well SupportedThe RDA for leucine is insufficient for healthy aging, obesity, or chronic illness.

✓Well SupportedFunctional measures of aging, including frailty and sarcopenia, appear to be preserved in calorically restricted animals, similar to observations with rapamycin.

✓Well SupportedAging involves the disruption of epigenetic patterns, leading to incorrect gene expression and cellular dysfunction.

✓Well SupportedCaloric restriction consistently extends lifespan across species.

✓Well SupportedIncorporating resistance training and adequate protein intake is important for older adults to counteract muscle mass deterioration.

✓Well SupportedAttenuating IGF-1 signaling in C. elegans, specifically through the daf-2 gene, can double lifespan and maintain youthful healthspan.

◐Partially SupportedTime-restricted feeding involves fasting for 16-18 hours daily and eating ad libitum during the remaining period.

✓Well SupportedIn a model, the relative risk of mortality associated with protein intake crossed over around age 65, suggesting higher protein diets became beneficial above this age.

✓Well SupportedIn studies where mice were fed continuously versus calorically restricted, two-thirds of the benefit came from calorie reduction and one-third from additional fasting.

✓Well SupportedYamanaka factors can reprogram the epigenome and restore cells to a pluripotent state.

◐Partially SupportedA 24-hour fast-feed cycle in mice that extends lifespan is equivalent to approximately a 5-day fast in humans.

✓Well SupportedCaloric restriction has been established to increase lifespan and reduce age-related disease burden and functional decline in multiple animal model systems.

?Limited ResearchThe precise mechanism by which rapamycin affects mTOR complex 1 and mTOR complex 2, and whether these effects are beneficial or harmful in humans, is not well understood.

✓Well SupportedBcl-2 inhibiting senolytic drugs do not induce apoptosis in normal, healthy eye cells, only in diseased cells.

✓Well SupportedMice exhibit functional declines in all tissues and organs with age, similar to humans, including kidneys, heart, and brain.

◐Partially SupportedThere is no single diet that fits all individuals; while some principles and foods work for certain people, no one diet is universally effective.

✓Well SupportedReprogramming factors can extend lifespan by 40-50% in progeroid mouse models.

✓Well SupportedMice consuming more calories due to methionine or tryptophan restriction live longer, suggesting a distinct mechanism from caloric restriction.

✓Well SupportedTreatment of 18-month-old mice with mouse-Ganitumab extended female lifespan by approximately 10%.

✓Well SupportedMaintaining muscle mass and activity levels is crucial for healthspan, as invalidity negates lifespan benefits.

✓Well SupportedAchieving 15 MET-hours per week of exercise can capture 30-50% of the total benefits of exercise.

✓Well SupportedConsuming double the Recommended Dietary Allowance (RDA) of protein makes a significant difference in muscle maintenance compared to the RDA alone.

✓Well SupportedPartial reprogramming aims to restore the epigenome to a youthful state without reverting cells to a pluripotent state.

✓Well SupportedTargeted reprogramming of retinal cells can restore function and reset cellular age in mice.

✓Well SupportedRapamycin is not stable at the gastric pH of mice, and the same appears to be true in humans.

✓Well SupportedCancer risk increases with age due to the accumulation of mutations over time as cells divide and accumulate damage.

✕Not SupportedReversing the epigenome does not reverse aging.

✓Well SupportedIGF-1 levels are not very informative in people over 50 years old due to binding proteins.

✓Well SupportedVisceral fat around the organs is particularly harmful and indicates metabolic dysfunction, inflammation, and insulin resistance.

✓Well SupportedKnocking out the growth hormone receptor in mice increases lifespan by 40-50% and reduces disease incidence.

✓Well SupportedmTOR inhibition can extend healthspan in multiple preclinical species.

◐Partially SupportedPatients prescribed growth hormone for injury healing report feeling better, potentially explaining its use for longevity.

◐Partially SupportedAge resetting treatments carry unknown long-term safety and repeatability risks, including potential stimulation of cancer cells.

✓Well SupportedRapamycin initiated late in life in mice has larger lifespan extension effects than late-life caloric restriction.

◐Partially SupportedPredictions made over the last 20-30 years regarding the speed of aging reversal technologies entering the clinic have not materialized.

◐Partially SupportedThe effectiveness of time-restricted feeding may depend on when the eating window occurs within the day.

◐Partially SupportedCaloric restriction studies often normalize metabolic rate or muscle mass to body weight, which can obscure true caloric restriction.

◐Partially SupportedCaloric restriction's lifespan extension effect in mice may be primarily due to cancer prevention.

◐Partially SupportedCalorically restricted mice maintain muscle function proportionate to their body weight.

◐Partially SupportedNutritional interventions, including extreme ones, carry significant risks that are often overlooked.

◐Partially SupportedShort-term rapamycin treatment in mice can improve aged heart function.

◐Partially SupportedGrowth hormone is the most abused drug in sports due to the lack of a reliable test, and an increased athlete mortality rate has not been observed.

✓Well SupportedCaloric restriction typically extends lifespan in mice only when initiated earlier in life, with initiation at 19-20 months of age being too late.

◐Partially SupportedThe relationship between protein intake and health during aging in humans may differ from that in mice.

?Limited ResearchIt is not yet conclusive for humans whether the feeding window duration (4, 6, 8, or 12 hours) matters for longevity, provided caloric intake is similar.

✓Well SupportedCaloric restriction in rats led to a 40-50% increase in lifespan in early experiments.

✓Well SupportedHuman dwarfs with Laron syndrome have less cancer and diabetes.

✓Well SupportedProtein intake alone can make some difference in muscle maintenance, but is less significant than when paired with hypertrophy training.

?Limited ResearchEpigenetic clocks' ability to measure biological aging and predict health outcomes or lifespan in individuals is not definitively proven.

◐Partially SupportedDrugs that slow aging generally need to be started between ages 20-60.

◐Partially SupportedCaloric restriction in animals has been shown to extend lifespan.

✓Well SupportedEpidemiological curves relating IGF levels to mortality are often U-shaped, down-sloped, or flat.

◐Partially SupportedDietary protein intake recommendations represent the minimum to prevent deficiency.

◐Partially SupportedThe Bethesda caloric restriction study in rhesus monkeys may have been confounded by genetic differences and variations in animal age at onset.

✓Well SupportedFood has been engineered to be highly addictive, leading to increased consumption and calorie intake.

?Limited ResearchCaloric restriction may benefit older monkeys more than younger ones.

?Limited ResearchThe benefit of caloric restriction for longevity is uncertain after optimal weight is achieved.

?Limited ResearchThe accumulation of mutations with age may not be sufficiently high to explain age-related functional decline.

◐Partially SupportedSarcopenia and osteoporosis are prevalent in individuals over 75, affecting at least 80% of this age group and leading to a significant decline in activity levels.

✓Well SupportedCurrent Recommended Dietary Allowances for protein are minimums to prevent deficiency and are based on nitrogen balance studies typically using young men.

✓Well SupportedThere is likely no benefit to a low-protein diet in older adults, excluding those with renal insufficiency.

◐Partially SupportedBranched-chain amino acids can directly activate mTOR through cestrones.

◐Partially SupportedThe crossover point where the mortality benefit of a high-protein diet outweighs any detriment is around age 50.

◐Partially SupportedHumans have a greater capacity than other primates to store excess energy, potentially facilitating development.

◐Partially SupportedA study demonstrates a sharp decline in muscle mass, strength, and physical activity levels around age 75, suggesting a 'cliff' in functional capacity.

◐Partially SupportedDetermining tissue-specific effects of mTOR inhibition is technically challenging and has yielded inconsistent results.

◐Partially SupportedEpigenetic clocks show some correlation with mortality outcomes in longitudinal studies.

◐Partially SupportedFibroblast growth factor 21 (FGF21) may be required for lifespan extension from protein restriction in mice.

◐Partially SupportedFree amino acids have a very short duration of ability to turn on mTOR, making sustained activation difficult without intravenous administration.

◐Partially SupportedHigher quality data is needed to make strong conclusions about caloric restriction versus time-restricted eating.

◐Partially SupportedDiets with lower protein content are associated with longer lifespans in mice.

◐Partially SupportedKetogenic diet, protein restriction, time-restricted feeding, and intermittent fasting are dietary interventions studied for aging effects.

◐Partially SupportedPartial reprogramming using Yamanaka factors or other combinations of factors may be a possibility for cell rejuvenation.

◐Partially SupportedCaloric restriction increases lifespan and healthspan.

◐Partially SupportedProtein restriction in mice can extend lifespan through mechanisms that may differ from caloric restriction.

◐Partially SupportedCalorie restriction can have mixed effects on the immune system in laboratory animals, sometimes improving responses to pathogen challenges and sometimes impairing immune function.

◐Partially SupportedThe Wisconsin caloric restriction study in rhesus monkeys likely mirrors a typical American situation more closely than other controlled laboratory studies.

✓Well SupportedThe decline of the immune system with age allows previously cleared cancer cells to proliferate.

◐Partially SupportedMaintaining physical function and independence is personally more important for quality of life than just extending lifespan.

◐Partially SupportedIGF-1 is a biomarker associated with protein intake and is part of the growth hormone and mTOR pathways.

◐Partially SupportedMolecular changes observed in caloric restriction studies, such as alterations in mTOR signaling and mitochondrial function, are shared between mice and monkeys.

◐Partially SupportedThe time course of muscle protein synthesis response to whey protein observed in animal models has been validated in humans.

✕Not SupportedCaloric restriction without optimal nutrition in humans may lead to immune deficits and increased risk of infectious diseases.

✓Well SupportedEating foods that spike blood sugar before bed is suboptimal for metabolic health.

✓Well SupportedThe relationship between reduced caloric intake and lifespan extension in mice is non-linear and dependent on genetic background.

◐Partially SupportedRestoring the epigenome to a youthful state may re-establish homeostatic mechanisms that maintain cellular health and repair damage.

✓Well SupportedEpigenetics, specifically DNA methylation, can alter gene expression by adding or removing methyl groups, effectively turning genes on or off.

◐Partially SupportedIt is difficult to reach concrete answers regarding optimal nutrition for healthspan.

✓Well SupportedFGF21 increases survival in male mice by 30% and female mice by 40%.

◐Partially SupportedCaloric restriction reproducibly improves lifespan in mammals.

✓Well SupportedFoods a great-grandmother wouldn't recognize may carry more risk.

◐Partially SupportedFasting-mimicking diets are engineered to be very low in sugar and protein, high in fat, and very low in calories.

◐Partially SupportedThe majority of dietary intervention studies in mice are flavors of caloric restriction, where the experimental group consumes fewer calories than the control group.

◐Partially SupportedIntermittent fasting is defined as a fast that occurs with a frequency greater than once per 24 hours, or a fast lasting 24 hours or more.

◐Partially SupportedPsychological consequences of hunger during fasting have biological consequences distinct from purely caloric restriction.

◐Partially SupportedAnimal data showing protein restriction extends lifespan and reduces cancer is a dominant theme in longevity science, but there is emerging pushback.

◐Partially SupportedThe relationship between nutrition and longevity is complex and difficult to draw definitive conclusions from.

◐Partially SupportedAwareness of longevity research allows adoption of interventions before they become mainstream.

◐Partially SupportedInterventions like drugs are easier to study for longevity than nutrition due to their binary nature.

◐Partially SupportedEpigenetic clocks are one of approximately eight to ten molecular processes that contribute to aging.

✕Not SupportedThere is no convincing evidence that partial reprogramming has successfully rejuvenated an aged heart in an old animal.

✕Not SupportedThere is a risk of misleading the public and scientific community with overly optimistic claims about reversing aging.

◐Partially SupportedIn the Han study (2019), mice on ad-libitum diets lived the shortest lifespan, with a median lifespan around 1200 days.

◐Partially SupportedOptimal weight loss involves disproportionately losing adipose tissue while maintaining or minimally losing strength and lean body mass.

◐Partially SupportedMutations in growth hormone upstream signaling in mice can lead to increased lifespans.

✕Not SupportedLosing 30% of body weight while losing 30% of strength is not an optimal outcome.

◐Partially SupportedAchieving near-optimal nutritional intake and maintaining body composition close to ideal provides most of the benefits for future health.

◐Partially SupportedIntermittent ketogenic diets in mice, requiring very low carbohydrate intake (1% or less), can increase lifespan by approximately 15% and may offer healthspan benefits.

◐Partially SupportedNeurons and cardiac myocytes have limited turnover compared to tissues like gut epithelium, skin, fingernails, and hair.

◐Partially SupportedEpigenetic reprogramming for aging would need to demonstrate at least 25% lifespan extension in mice to be comparable to rapamycin.

◐Partially SupportedRemarkable health can be achieved with diets that look nothing alike, such as a well-formulated strict vegan diet or a ketogenic diet.

◐Partially SupportedResearch into the effects of significant calorie restriction on mammalian aging began nearly 100 years ago, with early experiments published in the early to mid-1930s.

◐Partially SupportedRegenerating human cartilage without joint replacements would be a significant win for treating osteoarthritis.

◐Partially SupportedRapamycin does not cause muscle loss in mice or humans.

◐Partially SupportedFunctional measures of aging are more compelling than epigenetic or biochemical markers.

◐Partially SupportedAn ad-lib ketogenic diet may unintentionally restrict energy intake.

◐Partially SupportedMany epidemiological studies on optimal nutrition are based on data from 20-40 years ago, and the human environment has changed significantly since then.

◐Partially SupportedSome epidemiological studies find no downside to high protein intake in younger individuals (<50 years old).

◐Partially SupportedBoth too much and too little nutritional intake are detrimental.

◐Partially SupportedExercise-driven weight loss did not reduce bone mineral density, whereas caloric restriction-driven weight loss did.

◐Partially SupportedLaboratory mice typically die from cancer, unlike humans who commonly die from atherosclerosis.

✕Not SupportedBoth vegan and ketogenic diets can be unhealthy if they consist of 'pure garbage' foods.

◐Partially SupportedFixing the epigenome will not repair genetic mutations.

◐Partially SupportedNot being obese significantly reduces the risk for many diseases, as suggested by caloric restriction studies.

◐Partially SupportedMice on calorically restricted diets fed three times a week experience significant reductions in organ size followed by rapid hypertrophy.

◐Partially SupportedStarting caloric restriction late in life has a smaller effect on lifespan compared to starting early in life.

◐Partially SupportedStudies in nutrition and aging can be found to support almost any belief, necessitating a careful, global view of the totality of the data.

◐Partially SupportedMethionine restriction's effect on lifespan may involve mTOR, methylation for epigenetic modifications, protein synthesis, or sulfur amino acid biology.

?Limited ResearchReducing the intake of an unhealthy diet is beneficial, but it is unclear if eating less of a healthy diet extends lifespan.

◐Partially SupportedThe definition of 'optimal weight' is not well-established.

◐Partially SupportedThe impact of mTOR modulation depends on the magnitude and location of the modulation.

◐Partially SupportedCompounded rapamycin capsules may have lower bioavailability than branded formulations.

◐Partially SupportedIn mice, dietary intake and meal timing can affect mTOR signaling more than rapamycin treatment.

◐Partially SupportedSenescent cells may promote wound healing.

◐Partially SupportedEating a carrot is inherently less risky than eating a protein bar with 14 ingredients.

✕Not SupportedHigh protein intake combined with high calories, overweight, obesity, diabetes, and sedentary behavior is concerning.

◐Partially SupportedHigh growth hormone and IGF-1 signaling may increase cancer risk by promoting cell division in the early stages of cancer development.

◐Partially SupportedTime-restricted feeding limits the number of hours in a 24-hour period that an animal or person eats, with eating windows potentially ranging from 12 to 6 hours.

◐Partially SupportedHumans can maintain remarkable health on diverse diets, including strict vegan and ketogenic diets.

◐Partially SupportedThe benefits of caloric restriction may be partially derived from restriction during the developmental period.

?Limited ResearchThe optimal timing for time-restricted feeding in humans is not clearly defined and may depend on the specific health endpoint being optimized.

◐Partially SupportedHumans may tolerate nutritionally poor diets for many years before significant health consequences manifest.

◐Partially SupportedNutritional intervention studies in mice are valuable for dissecting biological mechanisms underlying aging, but direct translation to human dietary recommendations is cautioned due to potential differences in response.

◐Partially SupportedChanges in mortality late in life (after 65) have a greater effect on overall mortality than the same changes early in life.

◐Partially SupportedInflammation contributes to age-related decline in the body's ability to recover and heal by impairing stem cell function.

◐Partially SupportedDo not neglect basic health practices like diet and exercise assuming future aging reversal technologies will solve all problems.

◐Partially SupportedThe public is largely unaware of the substantial health benefits of moderate exercise.

◐Partially SupportedFocusing effort on exercise yields a higher return on investment for healthspan than optimizing nutrition.

?Limited ResearchThe potential downsides of significant caloric restriction in humans may outweigh the uncertain benefits for healthspan and lifespan.

◐Partially SupportedInhibition of protein synthesis can extend lifespan in invertebrates, and mTOR inhibition can lead to reduced protein synthesis.

◐Partially SupportedPeter Attia's clinical framework for assessing patients involves determining if they are overnourished or undernourished, under-muscled or adequately muscled, and metabolically healthy or unhealthy.

◐Partially SupportedThe 'adequately muscled, undernourished, metabolically unhealthy' patient phenotype is rare.

◐Partially SupportedHigh levels of sterile inflammation can impair stem cell function necessary for tissue repair.

◐Partially SupportedSenescent cells may impair cellular healing, but may also promote wound healing.

◐Partially SupportedCaloric restriction may be ineffective if started after 15 months of age in mice.

◐Partially SupportedInterventions for aging reversal or specific conditions may take four times longer and cost four times as much as anticipated.

◐Partially SupportedA 2019 Han study examined caloric restriction initiated at three months of age in female mice.

◐Partially SupportedSenolytic molecules that clear senescent cells have faced challenges, as exemplified by Unity Biotechnology's failed osteoarthritis trial.

◐Partially SupportedNo experiment has yet reversed aging in old mice using reprogramming factors.

◐Partially SupportedCaloric restriction in mice leads to increased activity throughout life compared to ad-lib fed mice.

✕Not SupportedThe low-fat diet trend of the early 1990s, which promoted high simple carbohydrate intake, is now known to be incorrect.

◐Partially SupportedFocusing on 'good enough' nutrition may be more practical than optimal nutrition due to complexity and food environment changes.

◐Partially SupportedThe resilience of the human genome allows for interaction with various nutritional inputs, suggesting the ancestral diet is not necessarily the best.

◐Partially SupportedAchieving 80% of optimal health outcomes is attainable for most people through nutrition and exercise, without needing to achieve perfect adherence.

◐Partially SupportedIso-caloric protein restriction requires careful examination of individual studies to determine if energy intake is constant.

◐Partially SupportedMice can enter ketosis within 24 hours, and humans can also achieve ketosis quickly depending on their diet.

◐Partially SupportedEating earlier in the day may lead to quicker glucose clearance due to increased insulin sensitivity or interactions between sleep and nutrition.

◐Partially SupportedFor most of human existence, the primary nutritional concern was insufficient intake, whereas the problem of overconsumption has become more recent.

◐Partially SupportedHigh insulin levels are associated with high IGF-1, while low insulin levels are associated with low IGF-1.

◐Partially SupportedCells and tissues maintain metabolites within normal ranges, making persistent dietary increases unlikely.

◐Partially SupportedUsing BCAA analogs to treat sarcopenia would require drugs that can sustain mTOR activation for longer periods.

◐Partially SupportedHigh IGF-1 has different implications in populations with obesity, metabolic disease, or diabetes compared to lean, exercising individuals eating a high-protein diet.

◐Partially SupportedMice in laboratory settings develop metabolic syndrome and insulin resistance with age, even when fed standard diets.

◐Partially SupportedCaloric restriction in rhesus monkeys fed a high-sugar diet increased lifespan and reduced age-related diseases.

◐Partially SupportedCaloric restriction and protein restriction increase lifespan in mice.

◐Partially SupportedChildren's DNA exhibits superior protein synthesis and repair capabilities compared to adults.

◐Partially SupportedLack of skeletal muscle impairs glucose tolerance and homeostasis, increasing diabetes risk.

◐Partially SupportedMutations in the growth hormone pathway leading to low growth hormone signaling from development are being studied for their effects on lifespan and age-related health outcomes.

◐Partially SupportedNutritional status, muscle mass, metabolic health, and DEXA scans can assess a patient's health.

◐Partially SupportedGrowth hormone therapy in humans is not clearly associated with significant benefits for strength, although muscle mass may increase, nor significant detriments or risks.

◐Partially SupportedApproximately 50% of the full benefits of exercise can be captured by moving from a sedentary state to achieving 15 MET-hours per week.

◐Partially SupportedCaloric restriction is a flavor of caloric restriction.

◐Partially SupportedMice are not a good model for studying the effects of early versus late feeding windows in humans.

◐Partially SupportedChronically slightly elevated branched-chain amino acids can have significant downstream effects, and chronic mTOR hyperactivation has known consequences.

◐Partially SupportedMost people can achieve significant health benefits by eating a relatively healthy diet, avoiding overeating, and being physically active, without needing to obsess over specific macronutrient ratios or fasting windows.

◐Partially SupportedHomeostasis, the body's ability to maintain a stable internal environment, is crucial for health, and its decline with age makes recovery harder.

◐Partially SupportedMice undergoing caloric restriction exhibit significantly increased activity levels throughout their lives compared to ad-libitum fed mice.

◐Partially SupportedAn activity level of 5 METs is equivalent to a very brisk walk or a slow jog.

◐Partially Supported15 MET-hours per week of exercise can be achieved through various combinations, such as 3 hours of activity at 5 METs.

◐Partially SupportedHigher than RDA dietary protein intake is likely beneficial for individuals over 50, especially if they exercise.

◐Partially SupportedTrue caloric restriction in humans can cause significant psychological consequences, including social isolation and constant hunger.

◐Partially SupportedHigh growth hormone signaling and high IGF-1 signaling are associated with a higher risk of developing cancer.

◐Partially SupportedThe duration of mTOR activation after a protein-rich meal depends on food combinations and activity levels.

✕Not SupportedRecommending a low-protein diet across the board for everyone is a mistake.

◐Partially SupportedIt is likely difficult to achieve large, persistent increases in mTOR activation solely from branched-chain amino acid supplements.

◐Partially SupportedEarly feeding results in a lower overall average glucose level compared to later feeding, potentially due to faster glucose clearance at night or increased insulin sensitivity in the morning.

◐Partially SupportedEarly feeding windows in time-restricted eating produce a lower overall average glucose level compared to late feeding windows.

◐Partially SupportedReducing IGF-1 signaling in middle age in mice may provide benefits by targeting peripheral IGF-1 while sparing brain IGF-1.

◐Partially SupportedCaloric restriction (CR) in laboratory animals preserves most functional measures of aging, including frailty and sarcopenia.

◐Partially SupportedA significant fraction of control-fed monkeys in the Wisconsin study developed diabetes, suggesting that even without obesity, a high percentage of calories from sugar (28.5%) can impair metabolism.

◐Partially SupportedDetermining a patient's energy deficit/surplus needs and protein intake requirements is informed by their nutritional status, muscle mass, and metabolic health.

◐Partially SupportedLow growth hormone signaling, despite reduced cancer and diabetes risk, is associated with higher rates of alcoholism, liver failure, and accidents.

◐Partially SupportedMaintaining a biologically younger immune system through exercise and diet can mitigate cancer risk.