Browse the evidence

Subgingival instrumentation (periodontal therapy) significantly reduces glycated hemoglobin (HbA1c) levels in patients with type 2 diabetes, demonstrating a bidirectional benefit where treating periodontitis improves metabolic control.

If you have diabetes and gum disease, getting your gums treated by a dentist is not just about saving your teeth; it helps lower your blood sugar levels. Standard cleaning (subgingival instrumentation) has been shown to reduce HbA1c by nearly 0.3%, which is clinically meaningful for metabolic control.

Short-term endurance training (10 days) increases whole-body lactate clearance rate (MCR) during submaximal exercise, despite unchanged lactate appearance rates.

If you are new to endurance training, your body's ability to clear lactate improves significantly within just 10 days of consistent submaximal exercise. This happens because your muscles get better at using lactate as fuel (clearance), not because they produce less of it. Focus on consistent, moderate-intensity sessions to trigger this metabolic efficiency.

Tenofovir alafenamide (TAF) is associated with greater weight gain compared to Tenofovir disoproxil fumarate (TDF), which appears to have a weight-mitigating effect.

If your HIV medication contains TAF (tenofovir alafenamide), you may gain more weight than if you were on TDF (tenofovir disoproxil fumarate). TDF seems to help mitigate weight gain. If you are concerned about weight, ask your doctor if switching your tenofovir prodrug from TAF to TDF is an option for you, keeping in mind that TDF may have other side effects like kidney or bone issues.

Low-load resistance training (20-30 RM) produces hypertrophic and strength adaptations in predominantly slow-twitch muscles (soleus) that are equivalent to heavy-load training (6-10 RM), refuting the hypothesis that fiber type composition dictates optimal loading strategy.

You do not need to lift heavy weights to build calf muscle. If you can perform 20-30 repetitions to failure, you will gain muscle and strength just as effectively as if you were lifting 6-10 repetitions. Focus on reaching failure with controlled form, regardless of the weight used.

Eight months of moderate-intensity exercise produces a 10-year legacy effect on metabolic health markers (blood pressure, fasting insulin, waist circumference), whereas vigorous-intensity exercise produces a legacy effect on cardiorespiratory fitness (peak VO2).

If your goal is better metabolic health (blood pressure, insulin sensitivity), prioritize moderate-intensity exercise (40-55% max effort). If your goal is maintaining aerobic fitness (VO2 max), prioritize vigorous-intensity exercise (65-80% max effort). You don't need to maintain the exact same volume or intensity you trained with initially to retain benefits; the initial adaptation creates a 'legacy' that persists for years, though recent activity levels also play a role.

Bariatric surgery leads to greater improvements in lipid profiles (increased HDL, decreased triglycerides) compared to non-surgical treatment, while LDL and total cholesterol changes are not significantly different.

Bariatric surgery improves lipid profiles by significantly increasing HDL ('good') cholesterol and decreasing Triglycerides compared to medical management. While LDL cholesterol may not change significantly, the overall improvement in lipid markers contributes to reduced cardiovascular risk. Patients should view lipid improvement as one of the key benefits of surgery alongside glycemic control.

Body composition assessment (quantifying fat-free mass, fat mass, and visceral adipose tissue) provides a more accurate assessment of cardiometabolic disease risk than Body Mass Index (BMI) alone, particularly for identifying 'normal weight obesity' and sarcopenic obesity.

Stop relying solely on the scale. If you are maintaining a 'normal' BMI but feel weak or have high blood sugar, ask for a body composition assessment (like DXA or BIA). This will reveal if you have 'normal weight obesity' (high fat, low muscle) or sarcopenic obesity (high fat, low muscle), which are high-risk conditions that BMI misses. Prioritize resistance training and protein intake to build muscle, as this is the most effective way to lower metabolic risk when BMI is misleading.

Epigenetic interventions, pharmacotherapy, and bariatric surgery are emerging as important tools for obesity management, alongside lifestyle changes.

Consult with a healthcare provider about advanced treatment options like pharmacotherapy or bariatric surgery if lifestyle changes alone are insufficient. These are valid medical tools, not last resorts.

Bariatric surgery (gastric bypass, sleeve gastrectomy, or adjustable gastric banding) is cost-effective over a 10-year horizon and cost-saving over a lifetime compared to conventional medical management, primarily by reducing the incidence of type 2 diabetes and cardiovascular events.

For obese individuals with BMI >40 (or >35 with Type 2 Diabetes) who have failed conservative weight loss, bariatric surgery is a clinically and economically superior long-term strategy compared to medical management alone. It significantly reduces the risk of diabetes and cardiovascular disease, leading to cost savings and improved quality of life over a lifetime. However, access barriers like insurance restrictions and waiting lists should be minimized, as delays result in lost health benefits.

Equating total training volume, resistance training performed 2 days per week produces similar increases in muscular strength and hypertrophy compared to 3 days per week in resistance-trained men.

If you are an experienced lifter, you do not need to train every muscle group 3+ times a week to maximize gains. As long as you are hitting the same total number of hard sets per week, splitting those sets across 2 days (e.g., Upper/Lower or Push/Pull/Legs) works just as well as hitting them 3 times. Focus on getting your total weekly volume in, rather than obsessing over high frequency.

Functional and physiological biomarkers are more suitable for medium- and long-term interventions (≥3 months) than acute or short-term interventions (<3 months).

If you are designing an intervention study to measure aging, ensure the intervention lasts at least 3 months (medium) or 6 months (long). Short-term interventions are unlikely to yield meaningful changes in these biomarkers.

The isoflow method, which measures inspiratory muscle endurance by maintaining a constant flow while subjects perform repeated maximum voluntary inspirations, provides a reproducible and accurate assessment of inspiratory muscle fatigue in healthy humans.

This paper describes a specialized laboratory method for testing breathing muscle endurance, not a home exercise. It shows that breathing muscles fatigue in a predictable, exponential manner when pushed to maximum effort at a constant airflow. For athletes or patients with lung issues, this test can accurately measure how well their diaphragm and accessory muscles hold up over time, identifying fatigue earlier than standard tests.

Specific subgroups of ultra-processed foods, namely fats/condiments/sauces and ice cream/sherbet, are associated with increased cardiovascular and colorectal cancer-specific mortality, respectively, in CRC survivors.

CRC survivors should pay attention to specific UPF categories. High intake of fats/condiments/sauces is linked to higher heart disease death risk, while ice cream/sherbet is linked to higher cancer death risk. Reducing these specific items may offer targeted benefits.

Poly-metabolite scores derived from blood and urine metabolomics can objectively quantify ultra-processed food (UPF) intake, serving as a valid alternative to self-reported dietary assessments.

If you want to accurately track your ultra-processed food intake without relying on memory or self-reporting bias, emerging metabolomic scores offer a precise biological alternative. While currently a research tool, these scores objectively reflect your actual UPF consumption by analyzing specific metabolites in blood and urine, bypassing the common errors of dietary surveys.

In dialysis patients, low muscle strength is a significant predictor of all-cause mortality, whereas low muscle mass alone is not associated with increased mortality risk when adjusted for confounders.

If you are on dialysis, focus on building functional strength (e.g., handgrip, leg press) rather than just trying to increase muscle size. Your ability to generate force is a much stronger predictor of your survival chances than how much muscle you have. Consult your care team for resistance training protocols suitable for your condition.

A 152-item semiquantitative food frequency questionnaire (SFFQ) provides reasonably valid estimates for ranking individuals' long-term intake of energy and 44 nutrients when compared against multiple 7-day dietary records or automated 24-hour recalls, provided that within-person variation in the comparison methods is statistically accounted for.

For researchers and health professionals, this paper validates the use of the 152-item SFFQ for assessing long-term dietary patterns in large cohorts. It confirms that while SFFQs may underestimate sodium and overestimate some nutrients, they are statistically robust for ranking nutrient intake when compared against detailed records, provided statistical adjustments for day-to-day variation are applied.

Estimated total daily sleep duration of 6–8 hours is associated with the lowest risk of all-cause mortality and major cardiovascular events, while durations exceeding 8 hours are associated with a significantly increased risk.

Aim for 6–8 hours of total daily sleep (nocturnal plus naps) for optimal cardiovascular health and longevity. If you naturally sleep longer than 8 hours, monitor for underlying health issues, as this is associated with higher risk. If you sleep less than 6 hours, daytime napping may help mitigate some risks, but napping while getting sufficient nighttime sleep (>6h) may increase risk.

Anthropometric measures of adiposity (BMI and waist circumference) demonstrate validity comparable to dual-energy X-ray absorptiometry (DXA) when evaluated against obesity-related biologic factors and metabolic syndrome prevalence.

You do not need expensive body composition scans (like DXA) to assess your risk for metabolic issues. Standard measurements like BMI and waist circumference are just as effective at predicting risks like high blood pressure, cholesterol, and inflammation. Focus on maintaining a healthy waist circumference and BMI, as these simple metrics reliably reflect your underlying biological health status.

Cardiometabolic conditions (obesity, hypertension, diabetes, heart failure) are major independent risk factors for severe COVID-19 outcomes, with obesity being the leading contributor to hospitalizations.

Maintaining healthy blood pressure, blood sugar, and weight is not just about long-term heart health; it is a critical defense against severe respiratory infections. If you have cardiometabolic conditions, proactive management (diet, activity, medication adherence) directly reduces your risk of hospitalization if you contract COVID-19.

Adhering to a vegan diet for 8 weeks significantly reduces high-sensitivity C-reactive protein (hsCRP) levels compared to an American Heart Association (AHA)-recommended diet in patients with established coronary artery disease, independent of changes in body weight or lipid profiles.

If you have heart disease, switching to a vegan diet for just two months can significantly lower your inflammation markers (hsCRP) more than a standard heart-healthy diet, even if you don't lose weight. This benefit comes from the types of food you eat (plant-based proteins, fiber) rather than just calorie counting. You don't need to do it alone; using tools like cookbooks and getting professional counseling can help you stick to it while continuing your prescribed heart medications.

Higher circulating levels of the dairy-specific fatty acid pentadecanoic acid (15:0) are inversely associated with the incidence of cardiovascular disease (CVD) and coronary heart disease (CHD).

This observational study suggests that higher levels of pentadecanoic acid (15:0) in the blood, which serves as a biomarker for dairy fat intake, are associated with a lower risk of heart disease. While this does not prove that eating dairy prevents heart disease, it challenges the idea that all dairy fat is harmful. For general health, focusing on whole food sources like dairy may be neutral or beneficial, but this is not a prescription to increase dairy intake specifically for heart health without considering other dietary factors.

Consumption of whole-fat dairy foods (milk, cheese) does not promote long-term weight gain and may improve body composition by reducing fat mass and increasing lean body mass, contradicting the reductionist view that saturated fat and calories in dairy drive obesity.

You do not need to restrict yourself to low-fat or non-fat dairy to manage your weight. Current evidence suggests that whole-fat milk and cheese do not contribute to long-term weight gain, and yogurt consumption is actually linked to weight loss. Focus on consuming unsweetened, fermented dairy products like yogurt and cheese, as they appear to support healthy body composition by reducing fat mass and increasing lean mass.

Obese individuals classified as metabolically healthy (MHO) exhibit lower visceral adipose tissue (vAT) and smaller adipocyte size compared to metabolically unhealthy obese (MUO) individuals, which is associated with lower systemic inflammation and preserved insulin sensitivity.

Your waistline and body composition matter more than your total weight. Focus on reducing visceral fat through lifestyle changes rather than just chasing a number on the scale. Regular monitoring of metabolic markers (blood pressure, lipids, glucose) is essential, as 'healthy obesity' is not a permanent state and can deteriorate over time.

Higher plasma levels of Trimethylamine N-oxide (TMAO) are associated with increased risk of all-cause mortality, cardiovascular disease (CVD) mortality, and death due to kidney failure in a multi-ethnic general population.

High plasma TMAO levels are linked to higher risks of heart disease, kidney failure, and overall mortality. Since TMAO is produced by gut bacteria from nutrients in red meat and eggs, managing your intake of these foods and supporting gut health may help lower TMAO levels and potentially reduce long-term health risks. Consult with a healthcare provider for personalized advice.