Browse the evidence

BMI is a suboptimal tool for predicting chronic disease risk and diagnosing obesity because it fails to distinguish between fat mass and muscle mass, leading to misclassification of athletes and elderly individuals.

Do not rely on BMI alone to determine your health status, especially if you are an athlete or elderly. BMI cannot distinguish between muscle and fat. Use waist circumference or body composition analysis for a more accurate assessment of obesity and health risk.

Insulin resistance (IR) fundamentally alters the association between specific lipid subclasses and clinical health markers, causing lipid profiles to diverge significantly from those seen in insulin-sensitive (IS) individuals.

If you have insulin resistance, standard lipid markers (like LDL/HDL ratios) may not predict your health risks the same way they do for healthy people. Your lipid profile's relationship with inflammation and blood sugar changes. Relying solely on standard lipid panels without assessing insulin sensitivity (e.g., fasting insulin, HOMA-IR, or SSPG) may miss critical metabolic risks.

During acute respiratory viral infections (RVIs), specific lipid subclasses (small TAGs, LPCs, ether-linked PEs) undergo dynamic, phase-dependent changes that correlate with immune response and energy metabolism shifts.

Your lipid profile is not static during illness. Small TAGs drop sharply early in infection (possibly for energy), while LPCs and ether-linked PEs drop later, correlating with inflammation. This suggests lipids play an active role in managing the immune response and energy demands of acute illness, rather than just being passive storage molecules.

Pro-inflammatory cytokines IL-1beta and TNF-alpha are somnogenic; their expression increases with waking activity and sleep deprivation, and they promote non-rapid-eye movement (NREM) sleep and slow-wave activity (SWA).

Prioritize sleep hygiene not just for rest, but to regulate inflammation. Chronic wakefulness or poor sleep increases pro-inflammatory cytokines like IL-1beta and TNF-alpha, which can disrupt sleep architecture and overall health. Managing inflammation through lifestyle may improve sleep, and good sleep helps manage inflammation.

The NLRP3 inflammasome is a critical mediator of sleep regulation; its activation leads to the production of IL-1beta and IL-18, which promote NREM sleep and slow-wave activity.

Understanding that sleep loss activates the NLRP3 inflammasome suggests that chronic sleep deprivation may fuel a cycle of inflammation. Breaking this cycle by improving sleep may reduce inflammasome activity.

Circadian rhythm disruption is associated with increased morbidity risk for inflammatory diseases, including cardiovascular disease, cancer, and metabolic disease.

Maintaining a regular sleep-wake cycle is crucial for long-term health, as disrupting your circadian rhythm increases the risk of inflammatory diseases like heart disease and cancer.

Oral zinc supplementation may decrease the absorption of certain drugs, including ciprofloxacin, doxycycline, and risedronate.

If you take ciprofloxacin, doxycycline, or risedronate, separate your zinc supplementation from these medications by a few hours to ensure proper drug absorption.

As food systems transition from rural/traditional to industrial/consolidated, the affordability of a recommended nutritious diet improves significantly, yet industrial systems fail to deliver optimal nutrition, environmental sustainability, and equity.

Do not assume that simply having the money to buy a 'healthy' diet guarantees good health outcomes. In industrialized food systems, while you can afford the recommended diet, the actual quality, environmental impact, and equity of that food supply may still be suboptimal. Focus on the quality and source of food, not just its cost.

As income and food system industrialization increase, per capita supply of animal-source foods increases, while supply of pulses and coarse grains decreases.

As your income rises, you may naturally gravitate towards more animal proteins and away from pulses and coarse grains. Be aware that this shift is a common economic trend, not necessarily a nutritional improvement. Pulses and coarse grains remain valuable, nutrient-dense components of a balanced diet.

Oxidative stress, driven by excessive reactive oxygen species (ROS) from both endogenous (mitochondrial dysfunction, NOX activity) and exogenous (air pollution, UV, smoking) triggers, is a central causal mechanism in cellular senescence and the pathogenesis of aging-related diseases including neurodegeneration, cardiovascular disease, and cancer.

Aging and many chronic diseases are linked to cellular damage from oxidative stress. You can mitigate this by reducing exposure to external triggers like air pollution, UV radiation, and smoking, and by maintaining healthy lifestyle habits such as regular exercise and a balanced diet rich in antioxidants, which help manage internal ROS levels.

Exenatide (2 mg once weekly) significantly reduces alcohol cue reactivity in the ventral striatum and septal area in patients with Alcohol Use Disorder, but does not significantly reduce heavy drinking days in the general AUD population.

Exenatide, a weekly injection used for diabetes and obesity, changes how the brain responds to alcohol cues in addicted individuals, potentially reducing the 'pull' of drinking triggers. However, this neurobiological change did not automatically lead to fewer heavy drinking days for most patients in this study. It suggests that while the drug modifies reward processing, it may not be sufficient as a standalone treatment for reducing actual alcohol consumption in the general AUD population without additional behavioral support.

In obesity, elevated saturated fatty acids and proinflammatory cytokines activate JNK and IKK kinases, which phosphorylate insulin receptor substrate (IRS) on inhibitory serine residues, thereby blocking PI3K/Akt signaling and causing insulin resistance.

If you have excess body fat, your cells are likely resisting insulin due to inflammatory signaling triggered by fats and cytokines. This isn't permanent damage; it's a reversible signaling block. Reducing caloric excess and saturated fat intake can lower the metabolic stress that triggers this inflammatory kinase activity, potentially restoring insulin sensitivity.

Dietary fiber promotes the production of beneficial tryptophan metabolites, specifically indolelactic acid (ILA) and indolepropionic acid (IPA), by making more tryptophan available for Stickland fermentation.

To support gut health and potentially reduce the production of harmful metabolites like indole, incorporate fermentable fibers (such as pectin found in apples) into your diet. This encourages beneficial bacteria to produce protective metabolites (ILA, IPA) and suppresses the production of indole, which is linked to chronic kidney disease risk.

Aging is characterized by a loss of structural and functional complexity in physiological systems, which impairs adaptability and leads to disease.

View aging not just as damage accumulation, but as a loss of system flexibility. Maintaining diverse physical and cognitive challenges may help preserve the 'complexity' that protects against sudden health failures.

Klotho protein functions as an anti-aging agent by inhibiting four major aging pathways (TGF-β, IGF-1, Wnt, NF-κB) and promoting antioxidant defenses, with deficiency leading to accelerated aging phenotypes and overexpression extending lifespan.

Maintaining healthy kidney function and managing metabolic health (blood sugar, blood pressure) may help preserve natural Klotho levels, which are linked to longevity. While direct Klotho supplementation is not yet a standard consumer intervention, lifestyle factors that support kidney health and reduce inflammation (like exercise and certain diets) are associated with higher Klotho expression.

The hypothalamus regulates basal metabolic rate (RMR) and adaptive thermogenesis through distinct neuronal populations and hormonal axes, with lean mass and thyroid hormone signaling being primary determinants of energy expenditure.

Focus on preserving lean muscle mass, as it is the largest driver of your resting metabolic rate. Your brain's hypothalamus regulates your baseline calorie burn through hormonal signals (like thyroid and leptin) and neural pathways. While exercise matters, your body's internal 'thermostat' sets the stage for how efficiently you burn energy at rest.

Cold exposure induces adaptive thermogenesis primarily through non-shivering thermogenesis (NST) mediated by brown adipose tissue (BAT) and UCP1, regulated by the hypothalamus.

Exposure to cold temperatures can activate brown fat, which burns calories to generate heat. This process, called non-shivering thermogenesis, is regulated by your hypothalamus. While not a replacement for diet and exercise, leveraging cold exposure (like cooler room temps) may support metabolic health.

Wearable sleep-tracking technology introduces healthcare disparities because sensor performance is negatively impacted by person-specific factors such as skin color and obesity, leading to inaccurate data for minority and obese populations.

If you have darker skin or obesity, be aware that consumer sleep wearables may be less accurate for you. Do not use these devices for critical health decisions without verifying their accuracy against clinical standards for your specific body type.

High-dose phenolic compound supplementation can exhibit pro-oxidant effects and cause toxicity, including liver damage and accelerated tumorigenesis, in certain contexts.

Avoid high-dose polyphenol supplements. While dietary sources are safe, concentrated supplements can become pro-oxidant and cause liver stress or other toxic effects.

Metabolomic biomarkers, particularly Branched-Chain Amino Acids (BCAAs), aromatic amino acids, and specific lipids (ceramides, sphingomyelins), can predict the onset and progression of Metabolic Syndrome and Type 2 Diabetes before clinical symptoms appear.

Current standard blood tests may miss early metabolic dysfunction. Emerging research shows that specific amino acids and lipids rise before diabetes symptoms appear. Until these tests are routine, focus on early lifestyle changes if you have risk factors like central obesity.

Caloric restriction (CR) without malnutrition extends healthspan and lifespan across multiple species by modulating nutrient-sensing pathways such as mTORC1, AMPK, and Sirtuins.

To potentially extend healthspan, reduce your caloric intake by 20-30% below your maintenance level without sacrificing essential nutrients. Focus on nutrient-dense foods to avoid malnutrition while triggering metabolic adaptations like autophagy and improved insulin sensitivity.

For individuals consuming a balanced diet, calcium and vitamin D supplementation provides little to no beneficial or detrimental effect on fracture prevention.

If you eat a balanced diet and are not on osteoporosis medication, you likely do not need calcium or vitamin D supplements for fracture prevention. Focus on getting these nutrients from food. If you are on medication or have a deficiency, your doctor may recommend specific doses.

A single administration of senolytic CAR T cells targeting uPAR eliminates senescent cells in aged mice, resulting in improved glucose tolerance, reduced fasting glucose, and enhanced exercise capacity.

This research suggests that targeting senescent cells via a single cellular therapy can reverse age-related metabolic decline and improve physical fitness in mice. While not yet available for human use, it highlights senolytics as a potential future intervention for longevity.

uPAR-targeting CAR T cells effectively treat metabolic syndrome induced by a high-fat diet in young mice, improving body weight, glucose tolerance, and insulin sensitivity.

In a mouse model of obesity, clearing senescent cells via CAR T therapy improved metabolic health and reduced body weight, even when the mice continued to eat a high-fat diet.