Browse the evidence

Increased sleep irregularity (defined as higher standard deviation of daily sleep duration) is associated with increased odds of incident obesity, essential hypertension, hyperlipidemia, major depressive disorder, and generalized anxiety disorder.

Focus on keeping your sleep schedule consistent. Going to bed and waking up at roughly the same time every day is critical for preventing obesity, hypertension, and depression, even if you are getting the recommended 7-9 hours of total sleep. Use wearable data to track your sleep regularity (consistency) rather than just total hours.

Higher percentages of REM and deep sleep are associated with a reduced incidence of atrial fibrillation, while higher light sleep percentages are associated with increased odds of atrial fibrillation.

Prioritize sleep quality that promotes REM and deep sleep. While total duration is important, the composition of your sleep matters for heart health. Consistent sleep schedules and avoiding alcohol before bed may help increase deep and REM sleep, thereby reducing atrial fibrillation risk.

Average daily sleep duration exhibits a J-shaped association with hypertension, major depressive disorder, and generalized anxiety disorder, where both short (5h) and long (10h) durations increase risk compared to the median (6.8h).

Aim for approximately 7 hours of sleep per night. Both sleeping significantly less (5 hours) or significantly more (10 hours) is associated with higher risks of hypertension, depression, and anxiety. Use your wearable to track your average daily sleep duration and adjust your schedule to stay within the moderate range.

Skeletal muscle mass measured via D3-creatine dilution is a strong predictor of functional capacity, mobility limitations, and injurious falls in older adults, whereas lean body mass measured by DXA is only weakly or not associated with these outcomes.

If you are assessing muscle health in older adults, standard DXA scans may underestimate the risk of falls and disability because they include non-muscle tissue in 'lean mass'. Accurate assessment of functional muscle mass (via D3-creatine dilution in research settings) reveals that muscle mass is a critical driver of mobility. For clinical practice, this implies that relying solely on DXA lean mass may miss high-risk individuals who have low functional muscle mass despite normal lean mass readings.

GLP-1 receptor agonists (GLP-1RAs) reduce major adverse cardiovascular events (MACE) in type 2 diabetes patients through pleiotropic mechanisms including blood pressure reduction, improved endothelial function, and anti-inflammatory effects, independent of weight loss.

If you have type 2 diabetes and are at risk for heart problems, GLP-1 receptor agonists (like semaglutide or liraglutide) offer heart protection beyond just lowering blood sugar. They work by improving blood vessel function and lowering blood pressure. While they are injections that can cause stomach upset, the cardiovascular benefits are significant and often independent of weight loss.

A low-protein/high-carbohydrate (LPHC) diet or specific restriction of methionine and branched-chain amino acids (BCAAs) extends longevity and improves metabolic health in model organisms and middle-aged humans by suppressing mTORC1 and GH/IGF-1 signaling while promoting autophagy and FGF21 production.

Focus on the source and balance of protein rather than just total grams. Prioritize plant-based proteins and consider reducing methionine-rich animal proteins (like red meat) if you are middle-aged, as this may support longevity pathways. However, ensure adequate protein intake in older age to prevent frailty.

High intake of animal protein, particularly red and processed meat, is associated with increased all-cause, cancer, and cardiovascular mortality in middle-aged adults, whereas plant protein is protective.

If you are under 65, try replacing some animal proteins (especially red and processed meats) with plant proteins like legumes, nuts, and seeds. This substitution is linked to lower risks of heart disease, cancer, and early death.

In adults over 66 years, high protein intake is associated with reduced all-cause and cancer mortality compared to low protein intake, likely to prevent sarcopenia and frailty.

If you are over 66, ensure you are getting adequate protein. Low protein intake in this age group is linked to higher death rates, likely due to muscle loss and frailty. Focus on high-quality protein sources.

The joint use of Body Mass Index (BMI) and A Body Shape Index (ABSI) provides a significantly better assessment of cardio-metabolic risk factors (high triglycerides, low HDL, high fasting glucose) and visceral adipose tissue (VAT) thickness than using BMI alone.

If you are assessing metabolic health, do not rely on BMI alone. Calculate your A Body Shape Index (ABSI) using your waist circumference, height, and weight. Using both BMI and ABSI together provides a much more accurate picture of your risk for high triglycerides, low HDL, and high blood sugar than BMI by itself. This is especially important if you have a 'normal' BMI but carry weight around your midsection.

Testosterone treatment significantly reduces depressive symptoms in men compared to placebo, with efficacy dependent on dosage and baseline symptom homogeneity.

If you are a man experiencing depressive symptoms, testosterone therapy may offer a clinically relevant reduction in symptoms, particularly if your symptoms are consistent (low variability) and you are prescribed a higher dosage (over 500mg/week). This benefit appears regardless of whether you are clinically hypogonadal. Consult a physician to evaluate if this adjunct therapy is appropriate for your specific symptom profile.

Native inulin supplementation (16g/day) combined with dietary advice to consume inulin-rich vegetables promotes greater weight loss and metabolic improvements in obese patients compared to placebo, but this efficacy is significantly compromised by concurrent metformin treatment.

If you are obese and not taking metformin, adding 16g of native inulin daily (starting with 8g for the first week) along with eating more inulin-rich vegetables (like garlic, onions, and artichokes) and eating 30% fewer calories can help you lose more weight and improve metabolic markers than just dieting alone. However, if you are already taking metformin, this specific supplement may not offer the same benefits, so discuss this with your doctor before starting.

Edible seaweeds serve as a highly concentrated source of essential macro- and trace minerals (such as K, Ca, Na, Mg, Fe, Zn, and I), providing mineral content 10 to 50 times higher than terrestrial plants by dry weight, thereby contributing significantly to daily mineral intake and functional food development.

Incorporate edible seaweeds into your diet to boost your intake of essential minerals like potassium, calcium, magnesium, and iodine. Seaweeds are naturally concentrated sources of these nutrients, often containing 10-50 times more minerals per dry weight than land vegetables. To maximize safety, choose varieties from regulated aquaculture or known safe species, as some wild-harvested seaweeds may accumulate higher levels of toxic metals like arsenic or lead.

Different classes of seaweed (green, red, brown) exhibit distinct mineral profiles, with brown seaweeds being particularly rich in iodine and sodium, red seaweeds high in potassium and iodine, and green seaweeds varying widely but often high in calcium and sodium.

If you are looking to boost specific minerals, choose your seaweed type carefully. Brown seaweeds like Kombu and Wakame are exceptionally high in iodine. Red seaweeds like Nori are rich in potassium. Green seaweeds like Sea Lettuce often provide higher levels of calcium and sodium. Diversifying your seaweed intake can help balance your mineral profile.

The implementation of a tiered Soft Drinks Industry Levy (SDIL) in the UK accelerated the reformulation of soft drinks, resulting in a 30% reduction in per capita sugar sales from 2015 to 2018.

Government policies that financially penalize high-sugar products (like the UK's Soft Drinks Industry Levy) effectively drive manufacturers to reformulate their recipes. This results in a significant, measurable decrease in the amount of sugar available to consumers, demonstrating that fiscal policy can successfully alter industry behavior and public health outcomes.

Plant-based meat alternatives (PBMAs) often have higher sodium and saturated fat content than conventional meat, and their health benefits are largely inferred from traditional plant-based diets rather than direct evidence on the processed products themselves.

If you are switching to plant-based meats for health, read the label. They often have much more sodium than regular meat. For better health outcomes, prioritize whole plant proteins like beans, lentils, and tofu over highly processed meat alternatives.

Substituting animal meat with plant-based meat alternatives (PBMAs) may improve cardiovascular risk factors like TMAO levels, but may also negatively impact bone health markers compared to meat consumption.

If you switch to plant-based meats, monitor your overall diet. While it might help some heart health markers, it may not support bone health as well as meat. Ensure you are getting enough calcium and vitamin D from other sources.

Higher velocity loss thresholds (20% and 40%) during resistance training maximize muscle hypertrophy compared to lower thresholds (0% and 10%), but excessive velocity loss (40%) induces negative neuromuscular adaptations such as slowed contraction delay and reduced early rate of force development.

For muscle growth, stop your sets when your bar speed drops by about 20% from your fastest rep. This gives you the best hypertrophy benefits without slowing down your muscle's ability to produce force quickly. Avoid stopping sets when speed drops by 40%, as this can hurt your power output. For strength, any moderate velocity loss (10-20%) works well, so prioritize technique and speed over total volume.

Monitoring accumulated training and match load in football is essential for controlling training demands, optimizing physiological adaptations, and guiding individual athlete performance, yet no consensus exists on the most effective monitoring system or metrics.

Track both external load (distance, speed zones via GPS) and internal load (heart rate, sRPE) across the entire week, not just match days. Since there is no single 'best' metric, consistency in how you measure load week-to-week is more important than the specific device used. Focus on the cumulative effect of training sessions, which make up 80% of the weekly load, to guide individual performance.

Saturated fatty acids (SFAs) promote inflammation and insulin resistance by activating the NLRP3 inflammasome and NF-κB pathways, whereas unsaturated fatty acids (UFAs) like EPA/DHA can inhibit these pathways.

The type of fat you eat matters for inflammation. Saturated fats (like palmitate) can trigger inflammatory pathways (NLRP3) and worsen insulin resistance. In contrast, unsaturated fats, particularly omega-3s (EPA/DHA), can help prevent this inflammation. Prioritize unsaturated fats for metabolic health.

BCAAs can stimulate mitochondrial biogenesis via the eNOS/NO/SIRT1/PGC-1α and mTOR/YY1 pathways, but this effect is tissue-specific and can be overridden by high levels of saturated fatty acids which suppress PGC-1α.

BCAAs can support mitochondrial health by stimulating biogenesis pathways, but this benefit can be canceled out by a diet high in saturated fats. To support mitochondrial function, combine BCAA intake (or natural sources) with a balanced diet low in saturated fats.

Semaglutide at its maximum tolerated dose (MTD) is associated with the highest odds of treatment discontinuation due to adverse events among all tested regimens, including tirzepatide MTD.

If you choose semaglutide at its maximum dose, be aware that you have the highest statistical risk of stopping the medication due to side effects compared to other options in this study. Monitor your tolerance closely and communicate with your provider immediately if side effects become unmanageable.

Tirzepatide demonstrates cardiovascular safety, with hazard ratios for major adverse cardiovascular events (MACE) remaining below 1.3 compared to pooled comparators, indicating no increased cardiovascular risk.

For patients with heart disease or high risk factors, Tirzepatide has been shown to be safe regarding cardiovascular events. It does not increase the risk of heart attack, stroke, or cardiovascular death compared to standard treatments. This makes it a viable option for those who need effective diabetes management without compromising heart health.

Resting metabolic rate (RMR) reduction following weight loss is driven primarily by the loss of adipose tissue mass and metabolic adaptations, rather than the loss of skeletal muscle mass.

You don't need to obsess over preserving every gram of muscle to stop your metabolism from slowing down. Research shows that losing fat mass itself, along with hormonal shifts (like lower leptin and thyroid hormones), is what actually drives your resting metabolic rate down after weight loss. This means metabolic adaptation is a natural response to losing fat, not just a failure to build muscle. To manage this, focus on sustainable, slower weight loss and personalized strategies that address these hormonal changes, rather than just trying to 'save' muscle.

Diet order effects on energy balance and body composition are not observed when comparing Ultra-Processed Foods (UPF) to Minimally Processed Foods (MPF) if the diets are matched for macronutrients, energy density, and fiber.

When comparing ultra-processed foods to minimally processed foods, the physical properties of the food (energy density, fiber, volume) matter more than the processing status itself for determining intake. In this study, when UPF and MPF were matched for these properties, there was no difference in weight loss or energy intake based on which diet was eaten first. This suggests that formulating UPF to match the fiber and density of whole foods may mitigate overeating behaviors.