Browse the evidence

Insulin resistance causes dyslipidemia characterized by high triglycerides, low HDL, and small dense LDL, which significantly increases the incidence of cardiovascular disease.

Insulin resistance changes your lipid profile in a dangerous way: high triglycerides, low HDL, and small dense LDL. This specific combination is highly atherogenic. Managing insulin sensitivity is key to improving this profile.

Probiotics significantly reduce the incidence of antibiotic-associated diarrhea (AAD) and Clostridium difficile disease (CDD) when specific strains (S. boulardii, L. rhamnosus GG) are used.

If you are prescribed antibiotics, ask your doctor about taking Saccharomyces boulardii or Lactobacillus rhamnosus GG to prevent diarrhea. These specific strains are proven to help, but other probiotics may not work for this purpose.

Dietary fiber fermentation by gut microbiota produces short-chain fatty acids (SCFAs) which stimulate the secretion of gut peptides (GLP-1, PYY) via GPR41/GPR43 receptors, thereby improving glucose regulation and reducing energy intake.

To leverage your gut microbiome for better blood sugar control and appetite regulation, consume complex carbohydrates (dietary fibers) that resist digestion in the small intestine. These fibers reach the colon where bacteria ferment them into short-chain fatty acids (SCFAs). These SCFAs activate specific receptors (GPR41/43) on gut cells, triggering the release of hormones like GLP-1 and PYY that improve glucose handling and reduce hunger. Focus on sources like resistant starches and arabinoxylans.

Anti-inflammatory therapies targeting specific pathways (e.g., IKKbeta/NF-kB inhibition with salicylate, IL-1 blockade with anakinra) can improve glycemic control and insulin sensitivity in patients with type 2 diabetes.

While not a lifestyle intervention, research shows that reducing specific inflammatory pathways (like IKKbeta/NF-kB) can improve blood sugar control in diabetes. This highlights the importance of inflammation in metabolic disease.

Soluble fibers (beta-glucan, psyllium, pectin, guar gum) lower LDL cholesterol, while insoluble fibers increase stool weight.

For heart health, choose soluble fibers like oats, barley, or psyllium. For digestive regularity, choose insoluble fibers like wheat bran.

For long-term weight regulation, diet quality (types of foods) is more important than calorie counting, as different foods have divergent effects on physiological pathways of weight homeostasis.

Don't just count calories; count food types. Prioritize foods that support healthy weight regulation (vegetables, nuts, legumes, whole grains) over those that impair it (refined grains, added sugars, processed meats). This approach naturally supports long-term weight stability better than strict calorie counting.

Prolonged sitting time independently compromises metabolic health (increased triglycerides, glucose, waist circumference) and increases mortality risk, even in individuals who meet physical activity guidelines.

If you have a desk job, do not assume your gym session protects you from the risks of sitting. Break up your sitting time frequently (e.g., stand or walk for a few minutes every 30-60 minutes). This 'breaking up' of sedentary time has been shown to improve metabolic markers like waist circumference and triglycerides independently of total sitting time.

Dietary intake of fermentable carbohydrates (fiber, resistant starch, prebiotics) increases the production of short-chain fatty acids (SCFAs) like butyrate and propionate in the colon, which contributes to gut barrier integrity, reduced inflammation, and metabolic health benefits.

To support your gut health and metabolism, prioritize foods rich in fermentable fibers like vegetables, fruits, whole grains, and legumes. These feed your gut bacteria to produce beneficial short-chain fatty acids (SCFAs) that support your gut barrier and metabolic health. If you are currently low in fiber, increase your intake gradually to minimize digestive discomfort.

Long sleep duration (≥9 hours per night) is associated with a significantly increased risk of coronary heart disease (RR 1.38), stroke (RR 1.65), and total cardiovascular disease (RR 1.41) compared to the reference group of 7-8 hours.

Aim for 7-8 hours of sleep per night. Consistently sleeping 9 hours or more per night is associated with a higher risk of heart disease and stroke. If you consistently need 9+ hours of sleep, it may be a marker of underlying health issues (such as depression or undiagnosed conditions) and should be discussed with a healthcare provider.

An expanded 131-item self-administered semiquantitative food frequency questionnaire (FFQ) provides a reproducible and valid measure of average daily nutrient intake over a one-year period in male health professionals, with correlations to diet records ranging from 0.28 to 0.86.

For large-scale health studies, a 131-item food frequency questionnaire is a valid and reproducible tool for estimating average nutrient intake over a year. It correlates well with detailed diet records for many nutrients (mean correlation 0.59-0.65) and accurately identifies individuals with high or low intake, making it suitable for epidemiological research into diet and disease.

Obesity drives systemic inflammation through adipose tissue secretion of pro-inflammatory cytokines (e.g., TNF-alpha, IL-6), which directly contributes to cardiovascular disease risk factors including atherosclerosis, hypertension, and insulin resistance.

If you have excess body fat, especially around your midsection, your body is actively releasing inflammatory chemicals that damage your blood vessels and increase your risk of heart disease and diabetes. Losing weight, particularly through diet and exercise, reduces this inflammation and lowers your cardiovascular risk, independent of just lowering cholesterol.

Chronic low-grade inflammation is a causative mechanism for insulin resistance and metabolic disease in obesity, rather than merely a consequence.

If you are overweight, your body may be in a state of chronic, low-grade inflammation that actively interferes with how your cells respond to insulin. This isn't just 'being fat'; it's a biological shift that promotes metabolic disease. Addressing this requires looking beyond simple calorie counting to strategies that may reduce this inflammatory burden, such as improving diet quality and managing stress, as the inflammation itself drives insulin resistance.

Maintaining a body-mass index (BMI) of 25.0 to 29.9 (overweight) during midlife (age 50) is associated with a 20 to 40 percent increased risk of death from any cause, independent of smoking and preexisting chronic disease.

If you are between 50 and 71 years old, your weight at age 50 is a strong predictor of your lifespan. Being 'overweight' (BMI 25-29.9) is not harmless; it is associated with a 20-40% higher risk of dying compared to being 'normal weight' (BMI 18.5-24.9). If you are currently overweight, focusing on gradual weight loss to reach the normal range is one of the most impactful actions you can take for longevity, especially if you have never smoked.

Obesity is a more prominent risk factor for developing type 2 diabetes in women than in men, with a stronger association between increasing BMI and diabetes risk observed in females.

For women, maintaining a healthy weight is critically important for preventing type 2 diabetes, potentially more so than for men of the same BMI. Weight management strategies should be prioritized, as the link between excess weight and diabetes risk is stronger in females.

Visceral adipose tissue (VAT) is a stronger predictor of cardiometabolic risk in men, whereas the ratio of visceral to subcutaneous fat (VAT/SAT) is a stronger predictor in women.

When assessing diabetes risk, men should be evaluated based on visceral fat levels, while women should be evaluated based on the ratio of visceral to subcutaneous fat. This sex-specific approach may improve risk prediction accuracy.

Global dietary transition involves a shift from carbohydrate-rich staples to vegetable oils, animal products, and sugar, driven by income growth and trade liberalization, which is associated with rising rates of obesity and chronic diseases.

As incomes rise in developing regions, diets tend to shift toward more expensive, processed foods high in fats and sugars. To mitigate health risks, food policies must ensure that agricultural and health sectors work together to make healthy, diverse foods accessible and affordable, rather than just increasing total calorie availability.

Automatic scoring algorithms applied to wrist actigraphy data can distinguish sleep from wakefulness with approximately 88% accuracy, providing reliable estimates of sleep latency, total sleep time, and sleep efficiency comparable to polysomnography.

Wrist actigraphy with automated scoring is a reliable, non-invasive tool for monitoring sleep patterns in clinical and research settings. It offers accuracy comparable to expensive lab-based polysomnography for key metrics like sleep latency and total sleep time, making it a practical choice for long-term sleep assessment.

Higher baseline abundance of the gut bacterium Akkermansia muciniphila is associated with improved insulin sensitivity and metabolic health in overweight and obese adults, and predicts greater improvement in glucose homeostasis following calorie restriction.

If you are overweight or obese, your natural gut health, specifically the levels of Akkermansia muciniphila, may determine how effectively a calorie-restricted diet improves your metabolic health. While you cannot directly control this bacteria yet, maintaining a diet rich in fibers and proteins (as used in the study) may support a healthier microbiome ecosystem that favors these beneficial bacteria.

Saturated fatty acids contribute to insulin resistance by inducing ceramide synthesis, whereas unsaturated fatty acids do not, and inhibiting ceramide synthesis can ameliorate this resistance.

Prioritize unsaturated fats (olive oil, nuts, fish) over saturated fats (butter, fatty red meat) to potentially lower ceramide levels and improve insulin sensitivity. This is a specific dietary lever within the broader obesity management strategy.

Adiponectin levels are inversely correlated with obesity and insulin resistance, and its deficiency contributes to insulin resistance, while its overexpression improves insulin sensitivity.

Lifestyle interventions that increase adiponectin (such as exercise and weight loss) are beneficial. Since adiponectin is low in obesity, improving metabolic health involves restoring this protective hormone.

Low-dose aspirin (75-160 mg/day) is recommended for primary prevention in individuals with a 10-year coronary heart disease risk of 10% or higher.

If your calculated 10-year risk of heart disease is 10% or higher, discuss taking low-dose aspirin (75-160 mg daily) with your doctor. The benefits of risk reduction generally outweigh the risks of bleeding for this group.

Low socioeconomic status (SES) is causally linked to higher prevalence of smoking, physical inactivity, and obesity, driven by mechanisms such as chronic stress, relative deprivation, and perceived limited benefits of healthy behavior rather than just lack of knowledge.

For individuals in lower socioeconomic positions, adopting healthy behaviors is not just a matter of knowing what is healthy. It is often hindered by chronic stress, lack of efficacy, and social norms. Interventions should focus on building self-efficacy, addressing stressors, and recognizing the social value of healthy behaviors, rather than just providing information.

Subcutaneous semaglutide at 0.4 mg daily significantly improves histologic resolution of NASH without worsening fibrosis in patients with stage F2 or F3 fibrosis compared to placebo.

For patients with NASH and fibrosis stages F2 or F3, treatment with 0.4 mg of subcutaneous semaglutide daily for 72 weeks significantly increases the likelihood of NASH resolution without worsening fibrosis compared to placebo. This benefit comes with a higher risk of gastrointestinal side effects, particularly nausea, which often diminishes over time. Patients should be counseled on nutrition and physical activity alongside this treatment.

Exercise-based cardiac rehabilitation improves health-related quality of life in a subset of patients, though evidence is heterogeneous.

While exercise-based cardiac rehab may not improve your quality of life in every case, it does so in the majority of patients. Focus on the proven mortality benefits, as QoL improvements are a positive bonus for many.