Browse the evidence

Central fat distribution (upper body fat) is a stronger predictor of blood pressure elevation and cardiovascular risk than total body mass index or peripheral fat distribution.

Where you carry weight matters. Losing weight is beneficial, but focusing on reducing central/abdominal fat may offer greater protection against high blood pressure and heart disease than weight loss alone, as central fat is more metabolically active and linked to higher cardiovascular risk.

Insomnia is a causal risk factor for type 2 diabetes, independent of BMI.

Prioritize treating insomnia as a medical risk factor for diabetes, not just a nuisance. If you have chronic sleep difficulties, address them with the same urgency as blood sugar management.

Adherence to a combination of low-risk behavioral factors (vegetarian diet, high physical activity, frequent nut consumption, moderate BMI, never smoking, and HRT for postmenopausal women) increases life expectancy by approximately 10 years compared to high-risk behavioral profiles.

Your daily choices regarding food, movement, and weight have a massive, compounding effect on how long you live. You don't need to be perfect; even adopting intermediate levels of healthy behaviors (like eating vegetables, moving regularly, and maintaining a moderate weight) can add years to your life compared to high-risk habits. Focus on consistent, moderate improvements across these areas rather than chasing perfection in one.

High consumption of fructose (specifically high-fructose corn syrup) promotes the development of nonalcoholic fatty liver disease (NAFLD) by driving hepatic de novo lipogenesis and inducing insulin resistance through JNK activation.

To protect your liver from fatty liver disease, limit your intake of added sugars, particularly those containing high-fructose corn syrup (HFCS) found in soft drinks and processed foods. The liver processes fructose uniquely, converting it directly into fat and causing inflammation, regardless of its effect on blood sugar.

Chronic hyperglycemia, indicated by elevated HbA1c levels, is associated with persistently lower muscle strength and muscle quality in aging adults, independent of muscle mass loss.

If you have elevated blood sugar levels (even if not yet diagnosed as diabetes), prioritize glycemic control not just for organ health, but to preserve muscle strength. This study suggests that high blood sugar directly harms muscle function, independent of how much muscle you have. Focus on managing blood glucose through diet and lifestyle to maintain mobility and reduce disability risk as you age.

High trait food craving (measured by FCQ-T-r) predicts susceptibility to state food craving triggered by palatable food cues, independent of physiological hunger.

If you experience strong, specific desires for certain foods (especially palatable ones) even when you aren't physically hungry, this is likely 'trait food craving' rather than a biological need. This psychological susceptibility is triggered by cues (sight, smell) and is distinct from plain hunger. Understanding this can help you differentiate between true physiological needs and cue-driven urges, allowing for more mindful dietary choices.

Daily subcutaneous administration of the dual GLP-1/glucagon receptor agonist MEDI0382 produces superior weight loss and fat mass reduction in diet-induced obese mice and cynomolgus monkeys compared to the GLP-1 analogue liraglutide, driven by glucagon receptor-mediated increases in energy expenditure.

For individuals seeking significant weight loss and metabolic improvement, dual GLP-1/glucagon receptor agonists like MEDI0382 offer superior fat loss compared to GLP-1-only treatments. This is achieved through daily subcutaneous injections that leverage both satiety signals (GLP-1) and increased energy expenditure (glucagon). While effective in animal models, human clinical application requires medical supervision due to the hormonal nature of the intervention.

Sleep restriction (SR) increases energy intake by 300–550 kcal/day and alters hormonal signaling (increased ghrelin, decreased leptin, reduced GLP-1) and brain reward network activity, leading to a positive energy balance and weight gain.

If you are struggling to lose weight or control your appetite, check your sleep duration. Getting less than 7 hours of sleep can significantly increase your hunger hormones and drive you to eat more calories, particularly from high-fat and high-carb foods. Prioritizing 7-8 hours of sleep is a critical, often overlooked, component of any weight loss strategy.

Higher coffee consumption (up to 8-10 cups/day) is inversely associated with the risk of developing type 2 diabetes, with a 6% risk reduction per cup per day.

Increasing your daily coffee intake, whether caffeinated or decaffeinated, is associated with a lower risk of developing type 2 diabetes. The risk drops by about 6% for each additional cup you drink, with benefits observed up to 8-10 cups per day. You do not need to drink decaf to get the benefit, but if caffeine causes you issues, decaf works just as well. Focus on consistent daily consumption rather than occasional high intake.

Endurance training increases maximal fat oxidation (MFO) rates and shifts the intensity at which MFO occurs to higher workloads by upregulating cellular transport proteins (CD36, CPT-1) and mitochondrial enzymes (HAD, Citrate Synthase).

If you want your body to become more efficient at burning fat, commit to long-duration endurance training (over 2 hours per session) consistently over months or years. This builds the cellular machinery (enzymes and transporters) needed to oxidize fat at higher intensities, allowing you to burn more fat per minute during exercise.

A biomarker signature characterized by lower-than-average inflammation and better-than-average kidney function (Signature 2) is associated with significantly lower mortality, lower risk of type 2 diabetes, and better physical function compared to the average aging signature.

This research suggests that 'biological age' can be assessed through a specific blood panel (19 biomarkers) rather than just chronological age. A profile showing low inflammation and good kidney function (Signature 2) is linked to longer life and better health. While you cannot directly 'take' this signature, the findings imply that maintaining low inflammation and kidney health are key components of healthy aging. Current clinical practice does not yet use these specific 26 signatures for patient care, but they highlight the importance of monitoring inflammatory and metabolic markers collectively.

Higher dietary intake of plant protein is associated with a statistically significant reduction in overall mortality and cardiovascular disease mortality compared to lower intake.

To support long-term health and longevity, prioritize plant-based protein sources (legumes, nuts, grains) over animal proteins. Specifically, replacing about 3% of your daily energy intake from animal protein with plant protein is associated with a 10% lower risk of death. This benefit applies to both men and women and holds true across various health statuses and lifestyle factors.

Substituting specific animal protein sources (eggs and red meat) with plant protein is primarily responsible for the observed reduction in overall mortality.

To maximize longevity, specifically target the substitution of eggs and red meat with plant-based proteins. Replacing 3% of energy from these sources with plant protein is linked to a 13-24% lower risk of death. This suggests that the type of animal protein matters, with eggs and red meat being the primary targets for reduction.

The accumulation of adverse modifiable factors (smoking, diabetes, obesity, hypertension, sedentary lifestyle) progressively reduces the probability of surviving to age 90.

Avoiding smoking, diabetes, obesity, hypertension, and sedentary lifestyle is crucial for reaching age 90. Each adverse factor you add significantly lowers your chances, dropping from 54% with none to just 4% with all five.

Once-weekly semaglutide (1.0 mg) and once-daily liraglutide (up to 1.8 mg) significantly reduce albuminuria and slow the decline of estimated glomerular filtration rate (eGFR) in patients with type 2 diabetes, with effects being more pronounced in patients with preexisting chronic kidney disease (eGFR <60 mL/min/1.73 m2).

If you have type 2 diabetes, especially if you have early signs of kidney stress (like reduced eGFR or albuminuria), GLP-1 receptor agonists like semaglutide (once weekly) or liraglutide (once daily) can protect your kidneys. They reduce protein in the urine (albuminuria) and slow the loss of kidney function over time. This benefit is particularly strong if your kidney function is already reduced (eGFR <60). Discuss these options with your doctor, as they may offer kidney protection beyond just blood sugar control.

In normal-weight young women, a combined diet and exercise intervention resulting in weight loss causes a significant compensatory increase in circulating ghrelin levels, whereas exercise alone without weight loss does not alter ghrelin levels.

If you are a normal-weight woman losing weight through diet and exercise, your body will naturally increase ghrelin (a hunger hormone) to compensate for the weight loss. This is a normal physiological response to the energy deficit, not necessarily a failure of willpower. However, exercise alone, without creating a weight loss, does not appear to alter these hormone levels in this population.

A single bout of endurance or resistance exercise significantly alters the concentrations of 196 distinct metabolites within 24 hours, with consistent increases in energy metabolism markers (lactate, pyruvate, fatty acids, acylcarnitines, ketone bodies) and consistent decreases in bile acids.

If you are looking to understand how your body responds to a workout, know that it is a massive metabolic event. Expect increases in energy substrates (fats, ketones, lactate) and decreases in digestive aids (bile acids) for up to 24 hours. This data is best used by researchers to identify biomarkers rather than by individuals for direct training adjustments.

Obesity is strongly associated with increased oxidative stress, chronic low-grade inflammation, and an increased risk of severe outcomes in infectious diseases like COVID-19.

Maintaining a healthy weight is critical not just for metabolic health but also for reducing the risk of severe complications from respiratory infections like COVID-19. Obesity is a major predictor of severe symptoms and critical care admission.

Oral ingestion of capsinoids (non-pungent capsaicin analogs) increases whole-body energy expenditure and reduces abdominal fat in humans with metabolically active brown adipose tissue (BAT) through the activation of the TRPV1-SNS-BAT axis.

If you have detectable brown fat, taking capsinoids (6-9 mg daily) may help slightly reduce abdominal fat and increase energy expenditure. However, if you do not have active brown fat, this supplement will likely have no effect on your metabolism. It is safe for long-term use.

Green tea extract rich in catechins increases energy expenditure and reduces body fat in humans with higher brown adipose tissue (BAT) activities, likely through the activation of TRPV1/TRPA1 channels rather than COMT inhibition.

Drinking green tea extract rich in catechins daily may slightly reduce body fat (2-3%) if you have active brown fat. The benefit comes from the catechins, not just the caffeine. It is not a magic bullet and requires existing BAT activity to work.

Brown adipose tissue (BAT) contributes to diet-induced thermogenesis (DIT) in humans, with individuals having higher BAT activity showing significantly higher postprandial energy expenditure compared to those with low BAT activity.

Your body burns more calories after eating if you have active brown fat. This is a natural physiological variation. You cannot directly 'take' this, but maintaining a healthy weight and potentially exposing yourself to mild cold may help maintain BAT activity.

Bedtime administration of gamma-hydroxybutyrate (GHB) at doses of 2.5–3.5 g doubles nocturnal growth hormone (GH) secretion in healthy young men by enhancing slow-wave sleep (specifically Stage IV).

For healthy young men, taking 2.5–3.5g of GHB at bedtime significantly increases growth hormone output by deepening sleep (Stage IV). This is not a muscle-building steroid but a physiological enhancer of natural sleep-related hormone pulses. It is well-tolerated in clinical settings but carries stigma due to recreational misuse; consult a physician before considering any off-label use.

The combination of naltrexone sustained-release and bupropion sustained-release (Contrave) produces a moderate, placebo-subtracted weight loss of approximately 4.5% in adults with obesity, achieved through synergistic modulation of central appetite and satiety pathways.

Contrave (naltrexone/bupropion) is a prescription medication that helps adults with obesity lose about 4.5% more body weight than placebo over several months. It works by targeting brain pathways that control hunger and the pleasure of eating. While effective, it can cause side effects like nausea, so doctors usually start with a low dose and increase it slowly. It is generally used alongside lifestyle changes like diet and exercise.

Higher Body Mass Index (BMI) is positively correlated with an increased risk of developing type II diabetes, with risk increasing significantly at BMI >35 kg/m2 and at lower BMI thresholds for South Asian, Black, and Chinese populations compared to White individuals.

If you have a family history of diabetes or belong to high-risk ethnic groups (South Asian, Black, Chinese), do not rely on BMI alone to assess your risk. Even a 'normal' BMI (e.g., 24-26) may carry higher diabetes risk for you than for a White individual with a BMI of 30. Prioritize waist circumference measurements and regular blood glucose screening over weight alone.