Browse the evidence

Frequent consumption of fungi and algae is associated with an increased prevalence of metabolic syndrome in Chinese men, whereas frequent consumption of nuts and pork is associated with a decreased prevalence in Chinese women.

For Chinese adults, dietary advice should be sex-specific. Men should monitor their intake of fungi and algae, as high frequency is linked to higher metabolic syndrome risk. Women may benefit from including nuts and pork in their diet, as high frequency is linked to lower risk. These findings highlight that 'healthy' foods may have different impacts based on sex.

Heterozygosity for the UCP3 exon 6-splice donor-stop polymorphism reduces basal fat oxidation by 50% and increases the respiratory quotient, indicating a metabolic shift toward carbohydrate oxidation and fat storage.

If you carry this specific UCP3 genetic variant, your body is genetically predisposed to burn less fat and store more carbohydrates at rest. This does not mean you are doomed to obesity, but it suggests that managing carbohydrate intake and maintaining physical activity to stimulate fat oxidation may be more critical for you than for someone without this variant. Focus on dietary patterns that support metabolic flexibility.

Genetic factors contribute to individual differences in NEAT, including the efficiency of movement and the tendency to increase NEAT in response to overfeeding.

Understand that your genetic makeup may influence your natural activity levels. However, this does not mean you are powerless. You can still increase NEAT by modifying your environment and making conscious choices to move more.

Administration of specific probiotics, such as Lactobacillus johnsonii N6.2, can hinder the development of diabetes in susceptible models by regulating gut integrity and modulating tight junction proteins like claudin-1.

If you have a genetic predisposition to diabetes or gut issues, maintaining gut barrier integrity is crucial. While this paper highlights Lactobacillus johnsonii N6.2 as a potential helper in animal models, it emphasizes that personalized nutrition and microbiome manipulation are key. Focus on a diet that supports your specific microbiome rather than relying on a single supplement.

Fecal microbiota transplantation (FMT) from lean, insulin-sensitive donors can significantly improve insulin sensitivity in insulin-resistant obese men within 6 weeks.

FMT from lean donors shows promise for improving insulin sensitivity in obese men, but it is not a guaranteed fix for everyone. This is a complex medical intervention. Current evidence suggests that dietary changes and lifestyle modifications are more accessible and foundational steps to support a healthy microbiome.

SIRT1 activation via resveratrol or genetic overexpression can extend healthspan and protect skeletal muscle from catabolic stress (e.g., TNF-alpha, disuse), but its effect on basal muscle mass and differentiation is complex and potentially inhibitory.

SIRT1 activators like resveratrol are popular for longevity, but their effect on muscle is nuanced. They may help protect muscle during illness, injury, or disuse by reducing inflammation and oxidative stress. However, they might also inhibit muscle growth and differentiation in healthy, well-fed individuals. Therefore, using SIRT1 activators for muscle building is not supported, but they might have a role in maintaining muscle during periods of stress or aging.

Replacing dextrose with lipid emulsions in parenteral nutrition reduces hyperglycemia and its associated complications (infections, mortality) in critically ill patients.

For ICU patients unable to eat, using lipid emulsions to provide about 30% of calories helps avoid dangerous high blood sugar levels caused by glucose-heavy formulas. Monitor triglyceride levels closely and reduce lipid doses if they exceed 400 mg/dL to prevent liver stress.

Soybean-oil-based lipid emulsions increase the risk of infection and sepsis in critically ill patients compared to lipid-free or alternative lipid formulations.

Be cautious with traditional soybean-oil-based lipid emulsions in septic or trauma patients, as they may increase infection risk. Consider alternative lipid emulsions (e.g., containing olive oil, MCT, or fish oil) which may have less impact on immune function.

Lipid emulsions rich in medium-chain triglycerides (MCT) or olive oil reduce oxidative stress and lipid peroxidation compared to soybean-oil-based emulsions.

If oxidative stress is a concern, consider using lipid emulsions containing MCT or olive oil, possibly supplemented with vitamin E, as they may cause less lipid peroxidation than traditional soybean-oil-based emulsions.

Lower childhood socioeconomic position is associated with slower walking and chair rise speeds in later life, independent of adult risk factors.

Early-life environment and socioeconomic status have long-lasting effects on physical capability in old age. While you cannot change your childhood, understanding this life-course perspective highlights the importance of early interventions and the cumulative impact of lifetime factors on health.

Overweight and obese individuals exhibit a gut microbiota profile characterized by higher abundance of Collinsella aerofaciens, Dorea formicigenerans, and Dorea longicatena compared to lean individuals.

Your gut bacteria profile differs if you are overweight or obese compared to if you are lean. Specifically, higher levels of Collinsella aerofaciens, Dorea formicigenerans, and Dorea longicatena are associated with higher body weight. Understanding these differences may help tailor dietary strategies for weight management.

FGF21 analogs reduce hepatic steatosis and lipotoxicity in NASH by suppressing de novo lipogenesis and increasing mitochondrial fatty acid oxidation, independent of weight loss.

FGF21 analogs are emerging therapies that target the hormonal drivers of liver fat. They work by telling the liver to stop making new fat and burn existing fat, rather than just restricting calories. This addresses the root cause of NASH (steatosis) rather than just the scarring (fibrosis).

FGF21 analogs exert direct anti-inflammatory effects in NASH by suppressing pro-inflammatory cytokine expression (TNF-a, IL-6, IL-1b) and inhibiting immune cell infiltration into the liver.

FGF21 analogs help reduce liver inflammation by blocking the signals that recruit immune cells and produce damaging cytokines. This helps prevent the progression from fatty liver to scarring (fibrosis).

Endogenous FGF21 levels are elevated in NASH patients but are insufficient to ameliorate disease due to a 'FGF21-resistant state' caused by receptor downregulation and enzyme-mediated inactivation.

Your body naturally produces more FGF21 when you have fatty liver, but it doesn't work well enough to fix the problem. This is why specialized FGF21 analogs are being developed to bypass this resistance.

Lower levels of IGF-1 are associated with longer life span in mice, and this region overlaps with human longevity quantitative trait loci, suggesting a conserved mechanism where IGF-1 regulation influences longevity.

Research in mice suggests that lower IGF-1 levels may be associated with a longer life span. While human data is still correlational, this highlights the importance of metabolic health. Avoid excessive anabolic interventions that might spike IGF-1 unnecessarily, and focus on balanced nutrition and exercise.

In elderly individuals, lower circulating levels of Insulin-like Growth Factor-1 (IGF-1) and Mechanical Growth Factor (MGF) are independently associated with reduced appendicular skeletal muscle mass (ASMI) and sarcopenia.

If you are over 60, your natural production of IGF-1 and MGF declines, which contributes to muscle loss. While you cannot easily change your age, you can support your hormonal health through adequate protein intake (at least 0.6 g/kg/day) and resistance training, which may help mitigate the decline in these growth factors.

Gastric bypass surgery reduces circulating ghrelin levels significantly, which may contribute to weight loss by suppressing appetite, although the mechanism is not fully understood.

For those undergoing gastric bypass, the significant drop in ghrelin may help manage hunger long-term. This hormonal change is a key factor in the surgery's efficacy, alongside the physical restriction of stomach size.

Resveratrol inhibits adipogenesis (fat cell formation) by down-regulating key transcription factors C/EBPα and PPARγ in pre-adipocytes.

Resveratrol may help prevent the formation of new fat cells by interfering with the genetic signals (PPARγ, C/EBPα) that tell stem cells to become fat cells. This effect is observed in cell and animal studies, particularly at higher concentrations (20-100 µM in vitro). While human bioavailability is low, its metabolites may still contribute to this anti-adipogenic effect.

Resveratrol reduces de novo lipogenesis (fat synthesis) and fatty acid uptake in adipose tissue by inhibiting enzymes like FAS, ACC, and LPL.

Resveratrol appears to reduce the body's ability to synthesize new fat (lipogenesis) and take up fatty acids from the blood (via LPL inhibition) in animal models. This contributes to reduced fat depots, particularly in obese subjects. The effect is seen on enzymes like FAS and ACC.

Resveratrol promotes apoptosis (programmed cell death) in mature adipocytes at high concentrations.

At high concentrations, resveratrol can trigger the death of existing mature fat cells (apoptosis). This effect is seen in cell cultures but requires doses much higher than typical dietary intake. It is a potential mechanism for reducing fat cell number, distinct from preventing new fat cell formation.

Resveratrol enhances brown adipose tissue (BAT) thermogenesis and increases fatty acid oxidation in skeletal muscle and liver.

Resveratrol may increase energy expenditure by stimulating brown fat thermogenesis and boosting fatty acid oxidation in muscles and the liver. This effect is observed in animal models and contributes to fat loss, though its magnitude in humans is less established.

Certain pharmaceutical drugs (ACE inhibitors, statins, mTOR inhibitors) and lifestyle interventions (exercise) can increase circulating Klotho levels, potentially offering therapeutic benefits for age-related diseases.

Regular physical activity and adherence to prescribed medications for blood pressure, cholesterol, or metabolic health may naturally support higher Klotho levels. This suggests that standard health maintenance practices contribute to longevity mechanisms.

Insulin resistance and hypertension are evolutionary adaptations (thrifty genotype) designed to conserve energy and sodium during famine, infection, or stress, which become maladaptive in modern environments characterized by caloric and sodium abundance.

Recognize that insulin resistance and high blood pressure are not just random errors but evolved survival mechanisms. In a modern world of abundant food and salt, these mechanisms overcompensate. Management requires actively counteracting these ancient drives through lifestyle choices that mimic the 'scarcity' conditions (e.g., physical activity, controlled sodium intake) that originally selected for these traits.

Intra-arterial administration of unacylated ghrelin (200 µg/min) improves endothelium-dependent vasodilation in patients with metabolic syndrome by increasing nitric oxide bioavailability.

This study shows that ghrelin improves blood vessel function in people with metabolic syndrome by boosting nitric oxide. While the study used an invasive injection method, it suggests that maintaining healthy ghrelin levels through weight loss and exercise (which naturally raise ghrelin) may help protect your blood vessels. If you have metabolic syndrome, focusing on lifestyle changes that increase your body's natural ghrelin could support your cardiovascular health.