Browse the evidence

In Mexican adults, general adiposity (BMI or height-adjusted weight) is a stronger independent predictor of blood pressure than central adiposity (waist circumference, waist-hip ratio, or waist-height ratio), with no evidence of threshold effects.

For Mexican adults, maintaining a healthy overall body weight is more critical for controlling blood pressure than focusing solely on waist size. Since there is no 'safe' threshold for adiposity, lower general body weight is consistently associated with lower blood pressure, regardless of where the fat is stored.

Supplementation with commercially available leucine metabolites (α-HICA, HMB-FA, or HMB-Ca) does not enhance resistance training-induced gains in muscle thickness, strength, or power in young, moderately trained men consuming a high-protein diet.

If you are a young, moderately trained man eating enough protein and training consistently, taking HMB or α-HICA will not give you better muscles or strength than if you just took a placebo. Focus on your training and diet instead of spending money on these supplements.

Co-administration of the GLP-1 receptor agonist liraglutide and nicotine synergistically lowers body weight in obese mice by simultaneously reducing food intake and increasing energy expenditure.

In obese mice, combining a GLP-1 drug (liraglutide) with nicotine resulted in greater weight loss than either drug alone. This happened because the combination reduced hunger more effectively and increased the body's energy expenditure. This suggests that for humans, smokers might experience enhanced weight loss from GLP-1 medications, or that specific nicotine-targeting strategies could boost GLP-1 efficacy.

Long-term weight loss maintenance is not significantly predicted by dietary adherence or caloric restriction, but is associated with baseline proteomic and gut microbiome signatures.

If you struggle to maintain weight loss despite good adherence, your baseline biology (proteins and gut bacteria) may be a factor. This suggests that personalized dietary strategies based on biological markers might be more effective than generic advice for long-term maintenance.

WB-EMS does not provide additional benefits for dynamic arm strength, balance, or flexibility in postmenopausal women compared to standard resistance and aerobic training.

Do not rely on WB-EMS to improve your balance, flexibility, or arm strength. Stick to traditional stretching and upper-body specific exercises for those goals. WB-EMS is best used as a tool to boost leg power and heart health when combined with standard exercise.

There is no clinically relevant difference in individual response heterogeneity (variability in body mass change) between low-carbohydrate and low-fat diets.

If you are choosing between a low-carbohydrate and a low-fat diet for weight loss, do not expect one to be inherently more 'unpredictable' or variable in its results than the other. The variability in how much weight people lose is similar for both approaches. Therefore, the choice should be based on preference, adherence, and health markers rather than an expectation of superior or inferior individual response variability.

Lifestyle interventions (diet and exercise) for diabetes prevention are discursively constructed around the assumption that weight loss is the primary, sufficient, and controllable mechanism for preventing type 2 diabetes, despite evidence that long-term diabetes incidence reduction is not guaranteed and mechanisms are often unspecified.

Do not assume that losing weight will automatically prevent diabetes, nor that your worth is tied to your ability to maintain a strict lifestyle. The science shows that while lifestyle changes help, they are not a guaranteed fix, and the biological mechanisms are complex. Focus on sustainable health behaviors rather than chasing weight loss as a moral imperative or a guaranteed cure.

Caucasian women with obesity exhibit significantly higher in vivo adipose triglyceride (TG) replacement and de novo lipogenesis (DNL) rates compared to African-American women.

This research highlights that the way your body handles fat storage and synthesis (lipid kinetics) may differ based on your race, even if your weight and BMI are similar to others. For Caucasian women with obesity, the study found higher rates of fat turnover and synthesis in fat tissue compared to African-American women. This doesn't mean you can't lose weight, but it suggests that metabolic responses to diet and exercise might vary. It underscores the importance of personalized approaches to health rather than assuming one-size-fits-all metabolic profiles.

Subcutaneous femoral (thigh) adipose tissue has significantly higher triglyceride (TG) replacement rates compared to subcutaneous abdominal (abdominal) adipose tissue in women with obesity.

Your body stores and processes fat differently depending on where it is. This study found that fat in your thighs (subcutaneous femoral) turns over (is broken down and rebuilt) faster than fat in your abdomen (subcutaneous abdominal). This might explain why some people find it easier to lose thigh fat than belly fat. It doesn't mean you can't lose belly fat, but it suggests that abdominal fat might be more 'stubborn' due to slower turnover rates.

Aligning dietary macronutrient prescriptions (moderate vs. low carbohydrate) to specific genetic polymorphisms (FABP2, PPARG, ADRB3, ADRB2) does not result in greater weight loss or body composition improvements compared to non-aligned diets in sedentary women with obesity.

If you are using a genetic test to choose between a low-carb and a moderate-carb diet for weight loss, do not expect the 'aligned' diet to give you an advantage. Both diets worked similarly well (or poorly) regardless of genetic alignment. Focus on sticking to a sustainable caloric deficit and exercise routine rather than spending money on genetic diet testing.

While a protein-polyphenol beverage accelerates early functional adaptations and increases type II fiber hypertrophy, it does not further increase peak isometric torque, overall muscle function, or total quadriceps muscle volume compared to placebo in the later stages of resistance training (sessions 10-30).

Don't expect this specific supplement to make you bigger or stronger than standard protein in the long run. The early boost in function and fiber size is nice, but for overall muscle volume and peak strength after the first month, it offers no advantage over a placebo or standard protein. You can likely stop the specialized polyphenol supplements after the initial adaptation phase.

Polygenic scores derived from 59 SNPs associated with central adiposity predict a smaller reduction in waist circumference after one year of lifestyle intervention, though the effect size is too small to be clinically significant.

Your genes might make it slightly harder to lose belly fat compared to someone else with different genetics, but the difference is less than a centimeter. This is too small to matter for your health goals. Focus on the lifestyle intervention (diet and exercise) as it provides a much larger benefit than any genetic disadvantage.

Short-term (2-week) crossover metabolic ward trials without washout periods are invalid for determining chronic macronutrient effects on energy intake and body fat due to massive, differential carry-over effects from physiologic adaptation.

Do not rely on short-term (under 4-6 weeks) diet studies to predict long-term weight loss outcomes. The body's metabolic adaptation to macronutrient changes (like ketosis or insulin shifts) takes weeks to months. Short trials often measure transient adaptation rather than chronic effects, leading to misleading conclusions about which diet is superior for fat loss.

Accelerometer-derived summary metrics (MIMS-unit, AAI, MAD, ENMO) derived from raw data provide greater comparability across different device manufacturers and models than traditional proprietary activity counts.

If you are a researcher, stop relying on proprietary 'counts' to compare studies. Use open-source raw data algorithms (like MIMS-unit or AAI) to ensure your findings are comparable across different device brands. If you are a consumer, understand that 'steps' or 'activity scores' from different brands are not mathematically equivalent, even if they look similar.

Food industry donations to academic programs create conflicts of interest by influencing research design, minimizing criticism of harmful products, and shaping public policy, often without transparent disclosure of the donation's purpose.

When evaluating health or nutrition research funded by food companies, check for disclosed conflicts of interest. If a study is funded by an industry with a vested interest in the outcome (e.g., sugary drinks funding obesity research), scrutinize the study design and conclusions more heavily, as industry funding is correlated with outcomes favorable to the sponsor.

Cardiac diastolic function, specifically the E/e' ratio and Left Atrial Volume Index (LAVI), significantly moderates the reduction in relative peak oxygen uptake in Type 2 Diabetes patients.

For T2D patients, standard cardiac checks might miss the root cause of exercise intolerance. If you struggle with exercise despite normal ejection fraction, ask about diastolic function (E/e' ratio). Addressing this through specific training (like high-intensity interval training, as suggested by the authors) may be more effective than generic advice.

Bariatric surgery, specifically Roux-en-Y gastric bypass (RYGB), is a highly effective treatment for severe obesity, providing rapid and durable weight loss, though it carries risks of adverse events and nutritional deficiencies.

For individuals with severe obesity (BMI >40 or >35 with comorbidities), bariatric surgery like RYGB is a highly effective, durable treatment. It is not a cosmetic procedure but a medical intervention for severe disease. Patients must be prepared for lifelong nutritional monitoring to prevent deficiencies.

Altering shoulder position (flexed vs. extended) during elbow flexion resistance training does not influence regional hypertrophy or maximum strength gains when resistance profiles are matched.

If you are doing biceps curls, it does not matter whether you sit on a preacher bench (shoulder flexed) or lie back on an incline bench (shoulder extended), as long as you are lifting heavy enough to fail around 8-12 reps. Both positions will build muscle and strength equally well. Do not waste time switching exercises to 'target' the long head; just pick one and focus on adding weight over time.

Total energy expenditure (TEE) and activity energy expenditure (AEE) exhibit greater male variability (GMV) that peaks in young adulthood and declines in old age, whereas basal energy expenditure (BEE) and standard morphometrics (height, fat-free mass) do not follow this specific life-course pattern.

Energy expenditure is not a fixed number but a variable trait that differs significantly between individuals, especially men during their reproductive years. This variability is driven by complex interactions of activity, muscle mass, and other traits, not just basal metabolic rate or height. For health planning, individualized assessment of energy needs is more critical than relying on population averages, particularly for young adult males.

There are significant research gaps regarding the effectiveness of nutritional interventions for underrepresented populations, specifically women, older adults, and Asian populations.

Be aware that most research on muscle hypertrophy interventions focuses on men and Western populations. If you are a woman, older adult, or from an Asian background, the optimal nutritional strategy may differ, and you should consult a professional for personalized guidance.

Obesity is a primary chronic disease driven largely by genetic predisposition, amplified by caloric intake and decreased energy expenditure, requiring recognition as a disease for proper insurance coverage and management.

Stop blaming yourself or your patients for obesity. It is a primary disease with strong genetic components. This recognition is the first step to getting proper insurance coverage and medical treatment, not just lifestyle advice.

Using external momentum (cheat repetitions) during single-joint upper body resistance training produces muscle hypertrophy equivalent to strict technique, despite generating significantly higher volume load.

If you are doing single-joint exercises like bicep curls or tricep pushdowns, you don't need to be rigid about 'strict' form to maximize muscle growth. Using 'cheat' reps (adding momentum) allows you to lift more total volume, which resulted in the same muscle growth as strict reps in this study. However, be cautious of joint stress, especially in your back and hips, as momentum can increase injury risk. Use this technique strategically, perhaps at the end of a set, rather than for every rep, to balance gains with safety.

In older adults, visceral fat levels significantly decrease over two years, while body weight, muscle mass, and total body fat percentage do not change significantly.

As you age, your visceral fat may naturally decrease even if your weight and muscle mass stay the same. This highlights the importance of monitoring visceral fat, not just weight.

Adhering to an anti-inflammatory diet (low Dietary Inflammatory Index) does not improve perceived stress or general health outcomes during caloric restriction in healthy, non-obese adults.

If you are restricting calories to lose weight, do not expect that focusing specifically on 'anti-inflammatory' foods will automatically lower your stress levels or improve your general health perception. The CALERIE trial shows that while CR itself may improve general health, the specific inflammatory potential of the diet (DII) does not drive these psychological benefits. Focus on sustainable caloric deficit rather than obsessing over anti-inflammatory metrics for mental health gains.