Browse the evidence

Protein intakes exceeding 2.0 g/kg/day do not provide additional lean body mass gains in the absence of concurrent resistance training.

Eating more than 2 grams of protein per kilogram of body weight will not build muscle if you are not lifting weights. Focus on resistance training first; protein alone is insufficient for growth without it.

The vast majority (approx. 92%) of daily protein intake in young adults comes from whole-food sources rather than supplemental protein isolates, regardless of training status.

You get almost all your protein (92%) from regular food, not supplements. This is typical for active young adults. You do not need to buy protein powder to meet your needs; focus on getting protein from meat, dairy, eggs, and plant sources.

Ramadan fasting significantly impairs anaerobic power (Wingate peak and mean power) and upper-body strength (bench press), but does not significantly affect lower-body maximal strength (leg press), explosive power (countermovement jump), or isometric strength (handgrip).

During prolonged fasting, expect a drop in your ability to perform high-intensity, short-duration efforts (like sprints or heavy upper-body lifts). Your leg strength and vertical jump may remain stable, but prioritize recovery and nutrition strategies for anaerobic tasks.

Resistance training-induced skeletal muscle hypertrophy is associated with the differential regulation of 110 non-coding RNA (ncRNA) genes, which mediate growth via specific cell types including leukocytes, satellite cells, and pericytes.

This research confirms that muscle growth is not just about mechanical tension but involves complex genetic regulation via non-coding RNAs. For the average lifter, this means individual genetic variability plays a huge role in response to training (only 61% were 'responders' in this study). While there is no direct intervention yet, this highlights that 'non-responders' may have different molecular profiles, suggesting future personalized training or nutritional strategies could be based on these biomarkers.

Micellar casein provides a sustained, slow-release amino acid profile, whereas free L-amino acids (L-AAs) and casein glycomacropeptide (CGMP) result in rapid, transient absorption peaks.

If you want a slow, steady drip of amino acids (like before bed or during long fasting windows), choose micellar casein. If you need a rapid spike of amino acids (like immediately post-workout), free amino acids or CGMP will deliver them much faster than casein. Note that CGMP does not act like casein despite being a peptide.

Visceral adipose tissue (VAT) accumulation exacerbates insulin resistance and increases fasting blood glucose and HbA1c, whereas brown adipose tissue (BAT) activation improves glucose regulation and insulin sensitivity.

Focus on reducing visceral fat (belly fat) rather than just total body weight. Strategies that activate brown fat (like cold exposure or specific exercises) or reduce visceral fat (through diet/exercise) are more effective for blood sugar control than general weight loss alone.

For patients with poorly controlled type 2 diabetes on basal insulin, using FreeStyle Libre (FSL) continuous glucose monitoring systems reduces overall lifetime healthcare costs and increases quality-adjusted life years (QALYs) compared to self-blood glucose monitoring (SBGM).

If you have type 2 diabetes, take basal insulin, and your blood sugar is not well controlled (HbA1c > 8%), switching from finger-prick testing to a flash glucose monitor (like FreeStyle Libre) is likely to save your healthcare system money and improve your long-term health and quality of life. This is because it helps prevent dangerous low blood sugar events and long-term complications like heart disease or kidney failure, while also being less painful and inconvenient than daily finger pricks.

Achieving optimal control of multiple risk factors (lifestyle and metabolic) in type 2 diabetes can restore life expectancy to levels comparable to individuals without diabetes.

If you have type 2 diabetes, focus on controlling your risk factors (blood sugar, blood pressure, lipids, smoking, diet, and exercise). Doing so can add 6-9 years to your life compared to poor management and may even bring your life expectancy in line with someone who doesn't have diabetes.

A healthy lifestyle can compensate for suboptimal metabolic control to provide longevity benefits in type 2 diabetes.

Even if your blood sugar or other metabolic numbers aren't perfect, maintaining a healthy lifestyle (not smoking, regular exercise, healthy diet) can still add 1.5-3.4 years to your life compared to someone who has perfect numbers but an unhealthy lifestyle.

Increased lean mass and cardiorespiratory fitness (CRF) mitigate cardiovascular risk in obese individuals, explaining the 'obesity paradox' where overweight patients with established heart failure have better survival rates than normal-weight counterparts.

If you have heart disease or high blood pressure, do not just focus on losing weight. Focus on building muscle and improving your fitness (CRF). Higher lean mass protects your heart and improves survival odds, even if you remain overweight. Aim for strength training and aerobic exercise to boost your fitness level.

Visceral fat and epicardial fat are primary drivers of cardiovascular disease pathology through inflammatory and vasocrine signaling, whereas subcutaneous lower-body fat may be protective.

Focus on reducing belly fat (visceral fat) rather than just total weight. Measure your waist circumference. If it is high, prioritize lifestyle changes that target visceral fat, as this specific fat drives heart disease through inflammation.

Implementing enhanced nurse care manager (NCM) training and digital monitoring tools in primary care significantly increases patient enrollment in online behavioral weight loss programs compared to basic implementation, without compromising weight loss outcomes or program acceptability.

For primary care systems, simply offering an online weight loss program is not enough. You must invest in 'Enhanced' implementation strategies: train your care managers in motivational interviewing, provide them with a dashboard that flags non-adhering patients, and encourage proactive follow-up calls. This approach significantly increases the number of patients who start the program, which is the biggest hurdle in obesity treatment, even if it doesn't change the weight loss results for those who do start.

Transitioning from obesity to non-obesity, transitioning from non-obesity to obesity, or maintaining stable obesity is associated with an elevated risk of chronic kidney disease (CKD) compared to maintaining stable non-obesity.

Maintaining a stable, non-obese weight is the most protective strategy for kidney health. Both gaining weight (if you are not obese) and losing weight (if you are obese) carry higher risks than staying stable. If you are obese, aim for gradual, sustainable weight management rather than rapid loss, as rapid loss may harm kidney function. Avoid weight cycling.

Extreme weight gain (≥20 kg) and substantial weight loss (>2.5 kg) are associated with increased CKD risk, forming a J-shaped or U-shaped relationship.

Avoid both extreme weight gain and substantial weight loss. Even small gains (≥2.5 kg) can increase kidney risk, especially in young adulthood. If you are obese, avoid rapid or substantial weight loss as it may also harm kidney function. Focus on stability.

The association between weight change patterns and CKD risk is stronger in individuals under 60 years of age at baseline compared to those 60 years or older.

If you are under 60, pay close attention to your weight stability. The risk to your kidneys from weight fluctuations is higher for you than for older adults. Prioritize maintaining a stable, healthy weight.

Exercise therapy reduces AHI and improves daytime sleepiness in OSA patients, often independently of significant weight loss, through mechanisms such as reduced leg fluid shift and improved upper airway neuromuscular control.

Incorporate 150 minutes of moderate aerobic exercise (like brisk walking) and resistance training twice a week into your routine. This can reduce the severity of your sleep apnea and improve daytime sleepiness, even if you don't lose a lot of weight. The benefits come from improved airway muscle control and reduced fluid shifts in your neck.

Modest weight loss (5%) in Type 2 Diabetes improves cardiovascular risk factors (lipids, glucose) but evidence for reducing actual cardiovascular mortality or events is mixed and inconclusive.

Losing 5% of your body weight if you are overweight with Type 2 Diabetes is highly recommended to improve your blood sugar, cholesterol, and overall heart health profile. However, do not assume this single change will eliminate your risk of heart attack or stroke; it works best when combined with blood pressure and glucose management.

Caloric restriction interventions produce significant short-term weight loss but are associated with significant weight regain and increased hunger/appetite over the long term (12+ months).

If you use calorie counting, expect your hunger to increase as you lose weight. This is a biological defense mechanism, not a lack of willpower. To avoid the 'yo-yo' effect, prioritize moderate deficits (e.g., 1300-1500 kcal) over extreme ones, and focus on high-satiety foods. Long-term success requires a plan that manages hunger, not just a number on a scale.

The modern food environment, characterized by cheap, highly processed, and palatable foods, promotes overconsumption and makes it difficult to reduce calorie intake below requirements, contributing to the obesity epidemic.

To manage weight in the current environment, rely less on willpower alone and more on structural changes: choose less processed foods when possible, be aware of portion sizes, and understand that the ease of overconsumption is a designed feature of the modern food supply, not just a personal failing.

Baseline sleep disturbance significantly moderates the efficacy of behavioral weight loss interventions in breast cancer survivors, with poor sleepers achieving significantly less weight loss than better sleepers.

If you are a breast cancer survivor trying to lose weight, your sleep quality matters as much as your diet. If you have poor sleep, standard weight loss programs may be half as effective for you. Consider getting your sleep evaluated and treated before or during your weight loss journey to maximize results.

High adherence to the Mediterranean diet is characterized by a macronutrient profile with lower carbohydrate (46-49%) and higher protein (19-22%) and fat (31-33%) intake compared to standard recommendations, which is significantly associated with lower adiposity and inflammation.

If you follow a Mediterranean-style diet, focus on keeping carbohydrates on the lower end of the recommended range (around 46-49% of calories) while ensuring adequate protein (19-22%) and healthy fats (31-33%). This specific balance is linked to lower body fat and reduced inflammation compared to standard high-carb interpretations of the diet.

The mortality benefits of healthful plant-based diets are more pronounced in younger adults (<65 years) and men, while the risks of unhealthful plant-based diets are significantly stronger in individuals with obesity (BMI ≥ 25 kg/m²).

If you are under 65 or have obesity, paying close attention to the quality of your plant foods (choosing whole grains over refined ones) may offer you particularly strong protection against mortality. For older adults or those with normal BMI, the benefits still exist but may be less pronounced.

High consumption of ultra-processed foods (UPFs) is associated with higher total energy and macronutrient intake but lower micronutrient intake in Korean adults and older adults.

If you eat a lot of ultra-processed foods, you are likely consuming more total calories and macronutrients (carbs, protein, fat) while getting fewer essential micronutrients. Focus on identifying the major UPF contributors in your diet (like alcohol, grain products, or specific snacks) and consider replacing them with less processed alternatives to improve nutrient density without necessarily increasing total energy intake.

The primary sources of ultra-processed food energy intake vary by age group, with alcohol and grain-based products being major contributors across all groups, while legumes, milk, and dairy products become more significant contributors as UPF consumption increases and age rises.

Identify the specific ultra-processed foods that make up the bulk of your UPF intake. For many Koreans, this includes alcohol and grain-based products. For older adults, UPFs from legumes, milk, and dairy may also be significant contributors. Targeting these specific categories for reduction or substitution may be more effective than a blanket 'no UPF' rule.