Browse the evidence

Pharmacological interventions for diabetes prevention are effective during active treatment but lose their efficacy immediately upon discontinuation, indicating they do not alter the underlying pathophysiology of insulin resistance or beta-cell dysfunction.

Medications can effectively prevent diabetes while you are taking them, but they do not provide long-term protection once you stop. If you discontinue medication, your risk returns to baseline. Therefore, medications are not a substitute for sustainable lifestyle changes if you plan to stop treatment.

Accelerometer-derived measures of sleep duration and quality are heritable and genetically distinct from self-reported measures, with specific genetic variants (e.g., PDE11A, MEIS1) influencing sleep traits.

Use objective sleep tracking (accelerometers) to get a more accurate picture of your sleep genetics and quality, as self-reports may be biased. Focus on identifying specific sleep issues (duration, efficiency) rather than just feeling rested.

Traditional self-reported dietary instruments (diet recalls, diaries, FFQs) systematically underreport energy intake, with the magnitude of error increasing with BMI, thereby attenuating or reversing observed diet-disease relationships.

Do not rely on your memory of what you ate to calculate calories or track weight loss progress. Self-reported intake is consistently 16-30% lower than actual intake, especially if you are overweight. For accurate health insights, use objective biomarkers (like Doubly Labeled Water) or calibrated statistical corrections rather than self-reported food diaries.

Obesity causes hypertension through multiple mechanisms including SNS overactivation, RAAS stimulation, leptin resistance, insulin resistance, and mechanical renal compression.

High blood pressure in obese individuals is not just about volume; it's driven by overactive nerves, hormones like leptin and insulin, and physical pressure on the kidneys. Treating the obesity addresses these root causes.

Across all populations, antihypertensive medications achieve greater systolic blood pressure (SBP) reductions than structured exercise interventions, with a mean difference of -3.96 mmHg.

Structured exercise lowers blood pressure, but not as much as medication. If you have hypertension, do not rely on exercise alone to manage it; consult your doctor about medication. Exercise is a valuable adjunct, but medication provides a stronger effect.

Macrophage accumulation and polarization towards a proinflammatory (M1-like) state in adipose tissue is the dominant mechanism driving insulin resistance in obesity.

Your fat cells aren't just storage; they recruit immune cells called macrophages when overfilled. These macrophages release inflammatory signals that block insulin. Reducing this inflammation, potentially through weight loss or anti-inflammatory strategies, is crucial for fixing insulin resistance.

Overall US adult obesity prevalence increased significantly from 2011 to 2018, with non-Hispanic Black individuals showing the highest prevalence but leveling off trends.

Overall obesity rates in the US are rising. To maintain health, focus on sustainable lifestyle changes such as balanced nutrition and regular physical activity, regardless of broader demographic trends.

AgRP neurons promote feeding and inhibit energy expenditure by antagonizing MC4R, and their activity is increased during fasting/starvation.

During fasting, your body activates AgRP neurons to drive hunger and conserve energy. This is a normal survival mechanism. Understanding this helps explain why hunger increases when you restrict calories.

Semaglutide (both oral and subcutaneous formulations) is associated with a high incidence of mild-to-moderate, transient gastrointestinal adverse effects (nausea, vomiting, diarrhea), which are dose-dependent and time-dependent, occurring primarily during the initial 8-12 weeks of treatment.

If you start semaglutide, expect some nausea, vomiting, or diarrhea, especially in the first few months. This is common and usually gets better. To minimize this, start with the lowest dose and follow the doctor's schedule for increasing it slowly. Eat smaller, slower meals and avoid fatty foods. If you take the oral version, take it on an empty stomach with a small sip of water, waiting 30 minutes before eating or drinking anything else.

Semaglutide does not significantly increase the risk of hypoglycemia in patients not using concomitant insulin or sulfonylureas, due to its glucose-dependent mechanism of action.

You don't need to worry about your blood sugar dropping dangerously low while taking semaglutide by itself. It works gently with your body's natural processes. However, if you are also taking insulin or sulfonylureas, your risk of low blood sugar increases, so your doctor may lower the dose of those other medications.

Adiponectin, secreted by healthy PVAT, acts as a vasodilator by activating AdipoR1 receptors, stimulating AMPK and eNOS to produce nitric oxide, thereby lowering blood pressure and improving insulin sensitivity.

Maintaining healthy adipose tissue function is crucial. While direct adiponectin supplementation is not discussed as a standard therapy, lifestyle interventions that improve adipose tissue health (like exercise and weight loss) naturally boost adiponectin levels, aiding blood pressure control and insulin sensitivity.

Testosterone treatment in older men with low testosterone increases volumetric bone mineral density and estimated bone strength, but does not significantly improve areal bone mineral density.

If you are an older man with confirmed low testosterone, testosterone therapy can significantly improve your bone density and bone strength, particularly in the spine. The treatment involves daily application of a gel, with dose adjustments to keep levels in the normal range for young men. While long-term safety requires more data, this study found no increase in cardiovascular or prostate issues over one year.

Insulin resistance is a central mechanism in Metabolic Syndrome, driven by impaired insulin signaling pathways (PI3K/Akt) and exacerbated by factors like saturated fatty acids, oxidative stress, and chronic inflammation.

Metabolic Syndrome is largely driven by insulin resistance, where your body's cells don't respond well to insulin. This leads to high blood sugar, fat storage, and other issues. Managing this involves addressing the root causes of insulin resistance through diet, exercise, and weight management.

Genetic factors account for 30-60% of the variance in cardiorespiratory fitness response to exercise training in humans.

Your genetic makeup determines a significant portion of how much your fitness will improve with exercise. This is not a failure of willpower. If one type of exercise doesn't work, try others, as genetic response to specific modalities may vary.

Metabolic syndrome is fundamentally a chronic inflammatory state driven by immune system deregulation, specifically involving M1 macrophages and pro-inflammatory cytokines (TNF-alpha, IL-1beta) originating from adipose tissue, liver, and intestine.

Think of your fat tissue not just as stored energy, but as an active organ that sends out distress signals (inflammation) when it's overstuffed. These signals damage your blood vessels and block insulin. Managing your weight and staying active directly calms this immune response, protecting your heart and metabolic health.

Tirzepatide is associated with a higher incidence of gastrointestinal adverse events (nausea, vomiting, diarrhea) compared to placebo and basal insulin, which can lead to treatment discontinuation.

Tirzepatide often causes stomach problems like nausea, vomiting, and diarrhea, especially at higher doses (10mg and 15mg). These side effects are more common than with placebo or basal insulin and can cause some people to stop taking the medication. Starting at a lower dose and increasing slowly may help.

Smoking cessation increases the short-term risk of type 2 diabetes, but this risk is directly proportional to post-cessation weight gain and does not mitigate the long-term reduction in cardiovascular and all-cause mortality.

Quitting smoking is the single most important step for longevity, regardless of what happens to your weight. While you might gain weight and see a temporary spike in diabetes risk (especially if you gain >10kg), the reduction in your risk of dying from heart disease or other causes is massive and sustained. Do not let the fear of weight gain prevent you from quitting.

Intensive glycemic control (targeting HbA1c <6.0-6.5%) slows the progression of microvascular complications (retinopathy, nephropathy, neuropathy) in type 2 diabetes, but does not significantly reduce macrovascular events within the first 3-5 years of treatment.

For Type 2 Diabetes, keeping blood sugar very low (HbA1c <6.5%) protects your eyes, kidneys, and nerves, but this protection takes years to show up in heart health. Be aware that aggressive sugar lowering can increase the risk of dangerous low blood sugar episodes, so the target must be balanced carefully with your doctor.

Current tobacco smoking modifies genetic susceptibility to obesity traits, specifically increasing genetic variance explained for overall adiposity (BMI) while attenuating genetic effects on body fat distribution (waist-to-hip ratio).

If you smoke, your genetic risk for gaining overall weight (BMI) may be higher than if you didn't smoke, but your genetic risk for storing fat around your waist (body shape) may be lower. Quitting smoking might change how your genes express themselves regarding weight distribution. This highlights that lifestyle choices like smoking can interact with your DNA to influence your body composition.

Chronic treatment with GDF15 promotes greater weight loss and reduces NAFLD compared to caloric restriction alone by maintaining energy expenditure and preventing adaptive thermogenesis in skeletal muscle.

This research suggests that GDF15 therapy could help overcome the metabolic slowdown (adaptive thermogenesis) that typically halts weight loss during dieting. By maintaining energy expenditure, particularly through fatty acid oxidation in muscle, GDF15 allows for greater fat loss than dieting alone. This is relevant for individuals who hit weight loss plateaus despite strict caloric restriction.

GDF15 maintains energy expenditure and promotes weight loss through a GFRAL-dependent signaling axis that activates beta-adrenergic receptors in skeletal muscle, increasing fatty acid oxidation and calcium futile cycling.

The weight loss benefits of GDF15 rely on a specific biological pathway involving the GFRAL receptor and beta-adrenergic signaling in muscles. If this pathway is blocked or missing, the energy expenditure benefits are lost.

Suspension of routine primary care during the initial COVID-19 lockdown (March 2020) caused a 76%-88% reduction in essential Type 2 diabetes health checks (HbA1c, blood pressure, BMI, etc.) compared to historical trends, with recovery remaining 28%-47% below expected rates through December 2020.

Do not skip your routine diabetes checks. The pandemic showed that missing even a few months of HbA1c, blood pressure, and kidney function tests leads to a significant backlog of untreated risks. If in-person visits are restricted, ask your provider about home monitoring kits or telehealth options to ensure your care continues uninterrupted.

COVID-19 lockdown restrictions caused a 19% reduction in new diabetes medication prescribing and a 22% reduction in new antihypertensive prescribing, while repeat prescribing remained stable.

If you have been diagnosed with Type 2 Diabetes or high blood pressure recently, do not assume your care has paused. The study shows a significant drop in new prescriptions during lockdowns. Contact your provider to discuss starting necessary medications, potentially using remote monitoring to bypass the need for immediate in-person visits.

Manipulating dietary Glycemic Index (GI) or Glycemic Load (GL) does not provide a significant benefit for weight loss, satiety, or cardiometabolic risk factors compared to isocaloric high-GI diets when fiber and energy intake are controlled.

Stop obsessing over the Glycemic Index for weight loss or health. The science shows that swapping high-GI foods for low-GI ones does not help you lose more weight or feel fuller, provided you eat the same amount of calories and fiber. Focus on eating whole foods, vegetables, and fiber-rich carbohydrates instead of calculating GI numbers. If you enjoy high-GI foods like white rice or potatoes, include them as part of a balanced meal with fiber and protein; they will not sabotage your health goals.