Browse the evidence

SIRT3 protects against oxidative stress and hearing loss during aging by deacetylating and activating antioxidant enzymes (SOD2, IDH2) and components of the electron transport chain.

SIRT3 helps protect mitochondria from oxidative damage by activating antioxidant enzymes and the electron transport chain. This protection is crucial for maintaining hearing and overall cellular health during aging.

SIRT3 acts as a tumor suppressor by suppressing the Warburg effect and HIF-1alpha activation, thereby inhibiting tumor growth and progression.

SIRT3 helps prevent cancer by suppressing the Warburg effect, which is the tendency of cancer cells to rely on glycolysis. Maintaining high SIRT3 levels may help keep cells in a healthier metabolic state.

The novel rapamycin analog DL001 selectively inhibits mTORC1 in vivo without disrupting glucose or lipid homeostasis, unlike conventional rapamycin which causes metabolic side effects via mTORC2 inhibition.

This research identifies a specific compound (DL001) that inhibits the mTORC1 pathway without causing the metabolic side effects (like high blood sugar and bad cholesterol) seen with standard rapamycin. While promising for treating age-related diseases and tuberous sclerosis in future human trials, it is not currently available for general use. The key takeaway is that selective mTORC1 inhibition may be a viable strategy to avoid metabolic disruption.

DL001 effectively suppresses hyperactive mTORC1 signaling in cells lacking a functional TSC (Tuberous Sclerosis Complex), restoring normal gene expression.

DL001 is shown to be as effective as rapamycin in suppressing the overactive mTORC1 signaling found in Tuberous Sclerosis Complex (TSC) cells. This suggests DL001 could be a safer alternative for treating TSC, as it may avoid the metabolic side effects associated with current rapalog treatments, although this is currently limited to cell culture models.

Low-dose lithium supplementation (1-25 mM in Drosophila) extends median and maximum lifespan and healthspan independently of sex and genetic background.

This study identifies lithium as a pro-longevity agent in fruit flies, extending lifespan by 16-18% at low doses (1-25 mM) without reducing food intake or fertility. The mechanism involves inhibiting GSK-3 to activate NRF-2, enhancing stress resistance. While promising, human translation requires caution due to the narrow therapeutic window and potential toxicity at higher doses. Future human trials may explore low-dose, intermittent, or late-life administration to maximize benefits while minimizing renal risks.

Genetic overexpression of SIRT6 extends median and maximal lifespan in both male and female C57BL/6 mice by preserving hepatic gluconeogenesis and energy homeostasis during aging.

This research identifies SIRT6 as a key regulator of healthy aging in mice, specifically by maintaining the liver's ability to produce glucose (gluconeogenesis) from precursors like lactate and glycerol during fasting. This prevents the metabolic decline and frailty associated with aging. While this is a genetic model, it suggests that supporting metabolic flexibility and hepatic health may be crucial for longevity. For humans, this underscores the importance of maintaining metabolic health through regular physical activity and potentially time-restricted eating patterns that engage gluconeogenic pathways, rather than seeking a simple genetic fix.

Exercise training fails to significantly increase aerobic capacity in p53-deficient mice, indicating p53 is necessary for the adaptive response to endurance training.

Not everyone adapts to endurance training with the same magnitude of mitochondrial improvement. If your genetic makeup (specifically p53 function) is suboptimal, your aerobic capacity may not improve significantly with standard training protocols, regardless of effort.

Activation of cholecystokinin-expressing neurons in the nucleus of the solitary tract (CCKNTS) projecting to the paraventricular hypothalamus (PVH) suppresses appetite and reduces body weight in mice.

This research highlights that appetite is regulated by a specific neural circuit in the brainstem that responds to nutrients. While this specific optogenetic intervention is not applicable to humans, it suggests that the feeling of satiety is a robust biological signal mediated by cholecystokinin. For practical purposes, this supports the importance of consuming nutrient-dense foods that trigger natural satiety signals, rather than relying on caloric volume alone.

Substituting pro-aging carbon sources (glucose and ethanol) with glycerol in yeast mimics the life-span extension effects of calorie restriction by activating stress resistance pathways without triggering pro-aging signaling.

While this study is in yeast, it suggests that the type of fuel your body uses matters for longevity. Replacing high-glycemic fuels (like glucose/ethanol equivalents) with more stable metabolic byproducts (like glycerol in this context) can mimic the benefits of calorie restriction. For humans, this implies that managing insulin and nutrient-sensing pathways (Tor/Sch9 homologs) through diet composition, not just caloric restriction, is crucial for longevity.

Adiponectin replacement therapy reverses insulin resistance and reduces atherosclerosis in animal models of obesity and diabetes.

This paper highlights that low levels of the hormone adiponectin are linked to insulin resistance and atherosclerosis in obese individuals. While replacing adiponectin has shown promising results in animal studies, human treatments are not yet available. For now, maintaining a healthy weight and engaging in regular physical activity are the best ways to support your body's natural adiponectin levels.

Impaired kisspeptin signaling in adult male mice does not result in obesity or glucose intolerance, demonstrating a strong sexual dimorphism in metabolic regulation.

Metabolic consequences of kisspeptin signaling impairment appear to be specific to females in this model. Males with the same genetic impairment maintain normal body weight and glucose regulation.

In long-standing extensive alopecia areata (EAA), T-cells in the scalp exhibit a state of partial tolerance characterized by reduced production of IL-2 and IFN-gamma, resulting in a paucity of inflammatory change and preventing follicle destruction.

For those with long-standing hair loss, the issue may not be active inflammation to be fought, but a specific immune tolerance where T-cells stop producing key growth signals (IL-2) and inflammatory markers (IFN-gamma). This suggests treatments might need to address this specific 'tolerance' state rather than just suppressing general inflammation.

Plasma estradiol (E2) levels are not associated with all-cause or ischemic heart disease (IHD) mortality in older men.

For older men, estradiol levels do not appear to be a predictor of survival or heart disease death. This suggests that strategies to optimize longevity in this age group should focus on testosterone and DHT rather than estradiol manipulation.

Smoking is a common external environmental factor driving specific DNA methylation patterns (VINYLPHENOL loci group) associated with 4-vinylphenol sulfate levels in blood.

Smoking directly alters your DNA methylation patterns, which in turn affects your blood metabolism, specifically regarding compounds like 4-vinylphenol sulfate. This provides a biological mechanism for why smoking is harmful beyond just lung damage. Quitting smoking may help normalize these epigenetic and metabolic markers.

Long-term pharmacological inhibition of mTOR using rapamycin extends the lifespan of mice, with a more pronounced effect in females than males, though it carries significant metabolic and immunological side effects.

While rapamycin extends lifespan in mice, its use in healthy humans is currently limited by side effects like immune suppression and insulin resistance. Current research explores intermittent dosing or specific mTORC1-selective inhibitors to mitigate these risks. For now, lifestyle interventions like calorie restriction or low-protein diets may offer safer, sustainable ways to modulate the mTOR pathway without the severe pharmacological risks.

Long-term supplementation with 300 µg/day of selenium (as selenium-enriched yeast) in populations with moderately low baseline selenium status significantly increases all-cause mortality approximately 10 years after treatment cessation.

If you live in a region with low soil selenium (like parts of Europe), standard supplementation (100-200 µg/day) may be safe, but you should avoid high-dose supplements (300 µg/day or more) taken long-term. The study suggests that exceeding 300 µg/day of total selenium intake (diet + supplements) for 5+ years may increase your risk of death, particularly if you are under 65. Consult a doctor to check your baseline selenium levels before supplementing.

A 12-week supplementation of 500 mg/day resveratrol does not significantly improve anthropometric measurements, insulin resistance markers, lipid profiles, or blood pressure in patients with NAFLD compared to placebo.

Do not expect 500 mg of resveratrol to fix your cholesterol, blood pressure, or insulin resistance. It may help your liver enzymes, but you still need to manage your weight, diet, and exercise to improve these broader metabolic health markers.

Cideb deficiency improves insulin sensitivity in the liver by increasing tyrosine phosphorylation of IRS-1 and phosphorylation of AKT, independent of changes in adiposity.

This study suggests that targeting liver-specific pathways like Cideb can improve insulin sensitivity without requiring immediate weight loss. This highlights the importance of metabolic health markers (like insulin sensitivity) beyond just body weight. Future therapies might target these specific liver mechanisms to treat type 2 diabetes and metabolic syndrome.

Brain-specific overexpression of SIRT1 extends lifespan and delays aging phenotypes in mice, primarily through hypothalamic regulation of metabolic homeostasis and circadian rhythms.

Current research suggests that longevity benefits from SIRT1 are specific to brain regions (hypothalamus) and cannot be assumed from global activation. While activators like SRT1720 show promise in mice, human application requires targeted mechanisms, not just general supplementation.

Cardiolipin oxidation is a primary event in the release of cytochrome c and increased permeability of the mitochondrial membrane to apoptosis factors.

Maintain mitochondrial health to prevent cardiolipin oxidation, which is a key step in apoptosis and aging.

Central nervous system (CNS) activation of GLP-1 receptors directly reduces peripheral lipid deposition in white adipose tissue (WAT) by modulating sympathetic nervous system (SNS) outflow, independent of changes in food intake.

Central GLP-1 signaling can directly tell fat cells to store less fat, independent of how much you eat. This happens through the sympathetic nervous system. However, this direct fat-reducing signal is lost in obesity, meaning this mechanism may not work for people who are already obese.

The ability of CNS GLP-1 to reduce fat storage is blunted in diet-induced obesity (DIO) due to a loss of sympathetic nervous system signaling to adipocytes.

In obese individuals, the brain's direct signal to burn fat via GLP-1 is blocked. This suggests that treatments relying solely on this pathway may be less effective for weight loss in obese people unless the resistance is overcome.

Dehydroepiandrosterone (DHEA) levels are not associated with the risk of incident type 2 diabetes in postmenopausal women.

Unlike testosterone, estradiol, and SHBG, DHEA levels do not appear to predict diabetes risk in postmenopausal women. You do not need to monitor or target DHEA for diabetes prevention.

In insects (Drosophila, fruit flies, crickets), lifespan is determined by the protein-to-carbohydrate (P:C) ratio rather than total caloric intake, with lower P:C ratios extending longevity.

For insects, lowering the protein-to-carbohydrate ratio extends life. For humans, this suggests that focusing solely on calorie restriction may be less effective than optimizing the balance of protein and carbohydrates, though direct human protocols are not yet established.