Browse the evidence

GLP-1 receptor agonists (GLP-1 RAs) show promise as gerotherapeutic drugs by protecting against aging-related risk factors such as oxidative stress, cellular senescence, and inflammation, and may reverse brain aging and prevent sarcopenic obesity, although lifespan extension in humans is not yet reported.

If you are considering GLP-1 RAs for weight loss, discuss with your doctor their potential anti-aging benefits, such as reducing inflammation and protecting against cellular senescence. While they are not yet proven to extend lifespan in humans, they may offer significant healthspan benefits.

In individuals with type 2 diabetes and existing complications, a 5-day prolonged fasting-mimicking diet followed by a glucose load significantly reduces cellular resistance to dicarbonyl stress and increases oxidative stress markers, indicating heightened susceptibility to metabolic harm upon refeeding.

If you have Type 2 Diabetes with known complications (like kidney or nerve issues), extreme fasting followed by a large carbohydrate load may stress your cells more than it helps them. While fasting can improve insulin sensitivity in some, it appears to reduce your cells' ability to handle stress in this specific subgroup. Consult your doctor before attempting prolonged fasting, as your body may react with increased oxidative stress rather than metabolic improvement.

Changes in lean mass do not significantly affect Resting Metabolic Rate (RMR) in the short term (16 weeks) for overweight/obese premenopausal women.

Do not rely on building muscle to significantly boost your resting metabolism for fat loss. While muscle is healthy and functional, its metabolic impact is small. Focus on creating a caloric deficit through diet and activity for effective fat loss.

Time-restricted eating combined with calorie restriction does not provide significant additional benefits for blood pressure, glucose profile, or lipid profile compared to calorie restriction alone.

Do not expect time-restricted eating to fix your blood pressure, blood sugar, or cholesterol if you are just counting calories. The benefits for these markers are not significantly better than just counting calories alone. Focus on the weight loss aspect of TRE.

Bariatric surgery significantly improves glycemic control (HbA1c reduction) in patients with metabolic syndrome, with effects sustained over 5 years.

For patients with metabolic syndrome and Type 2 Diabetes, bariatric surgery offers significant and sustained improvements in blood sugar control, often superior to medical management alone.

Bariatric surgery significantly improves blood pressure and lipid profiles in patients with and without metabolic syndrome.

Bariatric surgery leads to significant and sustained improvements in blood pressure and lipid profiles, reducing cardiovascular risk.

Serum HMW adiponectin levels do not significantly increase after 16 weeks of HIIT, but changes in adiponectin are strongly associated with changes in visceral adipose tissue (VAT) loss.

Don't expect HIIT to magically boost your adiponectin levels. However, if you lose visceral fat through HIIT, your adiponectin levels will likely improve as a result of that fat loss, not the exercise itself.

Sleep disruption is associated with an increased risk of certain cancers (colorectal, breast, prostate) and all-cause mortality, particularly in men.

For shift workers and those with chronic sleep disorders, maintaining sleep continuity and circadian alignment is critical for long-term health. Evidence links these disruptions to higher risks of colorectal, breast, and prostate cancers, as well as increased mortality, particularly in men. Prioritizing sleep hygiene and treating sleep disorders may mitigate these risks.

Propionate, a short-chain fatty acid produced from carbohydrate fermentation, can inhibit the conversion of acetate to cholesterol and fat, potentially reducing intra-abdominal tissue accretion and intrahepatocellular lipid content in overweight adults.

Foods that promote the production of propionate (a type of SCFA) in the gut may help manage body fat and liver fat levels. This suggests that the type of fiber you eat matters for metabolic health, not just total fiber intake.

Intravenous n-3 fatty acids (fish oil emulsions) reduce inflammation and improve outcomes in critically ill patients, including reduced infection rates and shorter hospital stays.

In hospital settings for critically ill patients, intravenous fish oil is used to modulate the severe inflammatory response. Evidence suggests it can help reduce infections and shorten the time patients spend in the hospital or on ventilators.

Exercise-induced myokines, including IL-6, IL-15, and FSTL1, mediate muscle-bone, muscle-skin, and muscle-vascular crosstalk, promoting bone formation, skin health, and cardiovascular protection.

Regular exercise helps maintain strong bones and healthy skin by triggering your muscles to release factors like IGF-1 and IL-15. These signals support bone formation and skin structure, contributing to overall long-term health and vitality.

Elevated gut-derived SCFA production contributes to metabolic health by modulating appetite, energy expenditure, and glucose homeostasis.

Incorporate prebiotic fibers (like inulin, resistant starch, and GOS) into your diet to naturally boost SCFA production. This may help regulate appetite and blood sugar. However, do not expect immediate metabolic fixes; this is a long-term strategy supported by strong mechanistic data but requiring more robust human trials.

Daily oral administration of live Akkermansia muciniphila (2.10^8 cells) improves metabolic health in high-fat diet-fed mice by restoring gut barrier function and reducing metabolic endotoxemia.

While human trials are ongoing, current research suggests that consuming Akkermansia muciniphila (specifically pasteurized forms which are more stable and effective) may help improve metabolic health by strengthening the gut barrier. It is not just about 'live' bacteria; the structural components of the bacteria are key.

Pasteurization of Akkermansia muciniphila enhances its metabolic benefits compared to live administration, likely due to the exposure of outer membrane proteins like Amuc_1100.

If you take Akkermansia muciniphila, a pasteurized (heat-treated) version may be more effective than a live one. The heat process exposes specific proteins (Amuc_1100) that boost metabolic health. This form is also more stable for storage.

Selective insulin resistance occurs in the liver where insulin fails to suppress hepatic glucose production (gluconeogenesis) but continues to stimulate lipogenesis (fat creation), leading to hyperglycemia and hepatic steatosis.

Standard insulin therapy may not fix high blood sugar in liver disease because the liver's fat-making machinery is still overactive. Treatments need to target both glucose production and fat synthesis.

Increased secretion of GLP-1 induced by delivering nutrients to lower parts of the small intestines explains weight loss and improvements in glycaemic control after bariatric surgery.

Bariatric surgery, such as Roux-en-Y gastric bypass, improves metabolic control partly by increasing GLP-1 secretion from the lower small intestine. This hormonal change contributes to weight loss and better blood sugar control.

Muscle fiber loss (hypoplasia) and motor unit denervation contribute significantly to age-related muscle atrophy, independent of simple fiber shrinking.

Maintaining muscle isn't just about eating protein; it's about keeping the nerve connections to your muscles intact. Regular resistance exercise is crucial to stimulate these nerves and prevent the actual loss of muscle fibers.

Treatment of NAFLD with specific pharmacological agents, particularly pioglitazone and GLP-1 receptor agonists, can improve liver histology and potentially reduce cardiovascular risk, although large RCTs focusing on CVD outcomes are still needed.

If lifestyle changes are insufficient, medications like pioglitazone or GLP-1 agonists may be considered. They have shown efficacy in improving liver inflammation and fibrosis in clinical trials. Discuss with your doctor if these are appropriate for your cardiovascular risk profile.

Activation of AgRP neurons by UDP (uridine-diphosphate) promotes feeding and weight gain, and elevated circulating uridine levels in obesity may sustain this vicious cycle.

This is a basic science finding; no direct human intervention is currently recommended based on this specific pathway alone.

Activation of SIRT1, SIRT3, and SIRT6 improves glucose metabolism and insulin sensitivity through mechanisms involving AMPK activation, NF-kB inhibition, and regulation of transcription factors like FoxO1 and PGC1α.

While specific SIRT-activating supplements are marketed, the most reliable way to support SIRT activity and metabolic health is through exercise and maintaining metabolic balance. The paper highlights that exercise improves SIRT6-mediated insulin signaling and that SIRT1 activation via AMPK helps glucose tolerance. Focus on consistent physical activity and metabolic health rather than unproven supplements.

SIRTs (particularly SIRT1, SIRT2, SIRT6, and SIRT7) exert anti-inflammatory effects by inhibiting the NF-kB pathway and reducing pro-inflammatory cytokines like TNF-alpha and IL-6.

Chronic inflammation is a risk factor for many diseases. SIRTs help regulate this process. While specific SIRT activators are not yet standard therapy, lifestyle factors that support SIRT activity (like exercise) may help manage inflammatory markers naturally.

Intermittent fasting enhances cognitive function and protects against neurodegenerative diseases by increasing BDNF and ketone levels.

Fasting may help your brain stay sharp as you age. It increases BDNF, a protein that supports brain cells, and ketones, which the brain uses efficiently. This might protect against cognitive decline.

Gut microbiota composition directly influences systemic inflammation through the production of specific metabolites: Short-Chain Fatty Acids (SCFAs) like butyrate inhibit pro-inflammatory pathways (e.g., NFκB), while Lipopolysaccharides (LPS) and Trimethylamine N-Oxide (TMAO) promote inflammatory cascades and insulin resistance.

Focus on dietary fiber to feed beneficial gut bacteria that produce anti-inflammatory short-chain fatty acids (like butyrate). Reduce intake of high-fat, low-fiber 'Western' diets which may promote pro-inflammatory bacteria and LPS release. Probiotic therapies targeting specific strains (e.g., Faecalibacterium) show promise for reducing inflammation, but individual responses vary.

Very low sodium intake (<3g/day) can increase cardiovascular risk by activating the renin-angiotensin-aldosterone system and sympathetic nervous system, leading to insulin resistance and increased mortality.

Avoid extremely low sodium diets. While reducing excess salt is good, going to the other extreme can trigger stress hormones and increase heart risk. A moderate intake is best for most people.