Browse the evidence

In older adults, resistance training combined with whey protein supplementation induces distinct skeletal muscle metabolic adaptations—specifically upregulation of tryptophan-indole metabolites, branched-chain amino acids (leucine, isoleucine, valine), and urea cycle intermediates—in individuals who exhibit high hypertrophic responsiveness (upper tertile).

For older adults seeking muscle growth, resistance training combined with adequate protein (whey) is effective, but results vary significantly. High responders exhibit specific metabolic adaptations, including increased levels of tryptophan, branched-chain amino acids, and urea cycle intermediates. This suggests that individual metabolic profiles play a key role in hypertrophic responsiveness, and those with lower responses may require different strategies or higher stimuli to achieve similar gains.

Post-exercise liquid protein supplementation (25g) enhances maximal strength gains in untrained young adults compared to resistance training alone, without significantly altering muscle mass or endurance adaptations.

If you are new to lifting, drinking 25g of protein immediately after your workout will help you get stronger faster than just training alone. While it might not make your muscles look bigger any faster than training by itself, you will likely lift heavier weights. Stick to a simple liquid protein drink post-workout for the best results.

Long-term supplementation with plant-based protein (PBP) yields equivalent results to animal-based protein (ABP) for lean body mass, muscle strength, physical performance, and cardiometabolic risk factors in adults.

If you are consuming enough protein daily (typically 1.6g/kg or more for muscle gain), the source (plant vs. animal) matters less than you might think for long-term results. You can effectively build muscle and maintain metabolic health with plant-based proteins like soy, provided you stick with it for at least 6 months.

Recovery status is an independent and significant predictor of lean body mass index, moderating the relationship between training load and muscle growth.

Monitor your daily readiness and soreness. If your recovery scores are low, your high training volume will not translate to muscle growth. Prioritize sleep and stress management to ensure your training load is effective.

Resistance training significantly increases muscle mass and functional capacity in pre-frail and frail elderly individuals, but the addition of 7.5g/day leucine supplementation provides no additional benefit over training alone.

If you are an older adult with pre-frailty or frailty, focus on consistent resistance training twice a week. Adding 7.5g of leucine daily will not provide extra muscle or strength benefits compared to training alone. Save your money and prioritize the exercise.

Elevated triglyceride levels and poor glycaemic control (HbA1c/T2DM) causally mediate the majority of the increased coronary heart disease (CHD) risk associated with higher body mass index (BMI).

For individuals with high BMI, simply losing weight may not be enough to protect the heart. The research indicates that high triglycerides and poor blood sugar control (HbA1c) are the main drivers of heart disease risk in this group. Therefore, secondary prevention should focus on actively managing these specific metabolic markers—through diet, medication, or lifestyle changes—rather than focusing solely on body weight or LDL cholesterol.

Higher BMI causally increases the risk of Coronary Heart Disease (CHD) independently of LDL cholesterol levels.

High body weight is a direct cause of heart disease risk, but not through the traditional LDL cholesterol pathway. This means that standard lipid-lowering strategies might not fully address the risk in obese individuals unless metabolic health (sugar and triglycerides) is also improved.

Obesity increases the risk of nephrolithiasis (kidney stones) through multiple mechanisms including lower urine pH, increased urinary oxalate, uric acid, sodium, and phosphate excretion, and insulin resistance-induced acidic urine.

If you are overweight, you are at higher risk for kidney stones due to changes in your urine chemistry caused by insulin resistance and diet. To reduce this risk, focus on weight management and a balanced diet that isn't excessively high in protein or sodium. Be aware that some surgical weight loss procedures can actually increase stone risk, so discuss this with your doctor.

Obesity is a significant risk factor for kidney stones (nephrolithiasis) and kidney cancer, driven by metabolic changes such as acidic urine and insulin resistance.

Being overweight increases your risk of kidney stones and kidney cancer. This is partly because obesity changes your urine chemistry, making it more acidic and prone to forming stones. Maintaining a healthy weight helps normalize urine chemistry and reduces these risks.

Comprehensive lifestyle interventions (LI) that incorporate multiple cornerstones of Type 2 Diabetes (T2D) management reduce HbA1c in research settings, but face a 'scale-up penalty' of 22-35% when translated to real-world primary care settings.

If you are managing T2D through lifestyle changes, expect that maintaining these changes in your daily life (real-world) is harder than following a plan in a structured program (research). The benefits are still there, but they may be about 20-35% less pronounced than in clinical trials. To maximize results, focus on integrating the core habits (diet, activity, monitoring) into your existing routine rather than trying to replicate the intensity of a clinical trial.

Macronutrient composition (low-fat vs. low-carbohydrate) has no significant difference on long-term weight loss or glycemic control in obese diabetic patients; total energy reduction is the primary driver of weight change.

You do not need to choose between low-carb or low-fat diets for superior results. Both work equally well for weight loss if you reduce your total calories. Focus on eating a balanced amount of carbohydrates (55-65% of energy) and maintaining a caloric deficit.

Waist-to-hip ratio (WHR) is a significant predictor of ASCVD risk in individuals with ideal cardiovascular health, whereas BMI is not, suggesting that body fat distribution is more critical than total body weight for risk assessment in this group.

If you are metabolically healthy, your waist-to-hip ratio is a better predictor of heart disease risk than your weight. Consider tracking your waist and hip measurements to assess your risk, as visceral fat is more harmful than subcutaneous fat.

Objective measures of physical activity (via accelerometers) in long-term lifestyle intervention trials often show no significant difference between intensive and control groups, despite self-reported improvements and weight loss benefits.

Self-reported exercise improvements may not always reflect objective changes in daily movement. However, even modest objective increases in activity, if sustained, can contribute to cardiovascular benefits, suggesting that any increase in movement is valuable even if it doesn't meet high-intensity targets.

Bariatric surgery is the most effective intervention for sustained weight loss in Obesity Hypoventilation Syndrome, with gastric bypass being the most effective procedure for weight reduction, though it carries higher complication risks.

For Obesity Hypoventilation Syndrome, lifestyle changes alone are rarely enough to fix the breathing issues. Bariatric surgery, particularly gastric bypass, is the most effective way to lose the significant amount of weight (25-30%) needed to potentially resolve the syndrome. You must weigh the surgical risks against the high risk of staying obese.

Tirzepatide improves cardiovascular risk factors, including blood pressure, lipid profiles, and liver fat content, in patients with type 2 diabetes, without increasing the risk of major adverse cardiovascular events in high-risk patients.

Tirzepatide not only lowers blood sugar and helps with weight loss but also improves other heart health markers like blood pressure, cholesterol, and liver fat. For patients with type 2 diabetes who are at high risk for heart problems, tirzepatide has not been shown to increase the risk of major cardiovascular events. This makes it a valuable option for comprehensive diabetes management, addressing both metabolic and cardiovascular health.

An intensive lifestyle intervention (ILI) focused on weight loss and physical activity reduces total healthcare costs compared to diabetes support and education (DSE), but this cost reduction is largely mediated by the slowing of frailty index progression.

For those managing type 2 diabetes and obesity, an intensive lifestyle program involving significant weight loss and exercise can reduce healthcare costs by about $460 annually. However, this saving is primarily because the program slows down biological aging (frailty). If you are considering such an intervention, focus on the health benefits of slowing frailty; the cost savings are a secondary benefit that may not be statistically significant for every individual.

Increased social support for healthy eating from family mediates the association between intervention attendance and increased fruit and vegetable intake, accounting for 62% of the effect.

If you are trying to eat more fruits and vegetables, involve your family or community in your journey. The study shows that encouragement from family members is a powerful driver of success, mediating over 60% of the improvement in healthy eating. Seek out groups or family members who can support your dietary goals rather than trying to do it entirely alone.

Increases in psychological flexibility moderate the relationship between weight loss and depression reduction, such that individuals who lose weight AND increase psychological flexibility experience significantly greater reductions in depression than those who lose weight alone.

If you are doing a weight loss program, don't just focus on the scale. Pay attention to your ability to stay committed to your goals even when it feels hard or uncomfortable (psychological flexibility). The research shows that people who get better at this mental skill while losing weight see much bigger improvements in their depression than those who just lose weight. Consider adding mindfulness or acceptance-based strategies to your routine to boost mental health outcomes.

Modest combined improvements in sleep (11 min/day), physical activity (4.5 min/day MVPA), and nutrition (3 DQS points) are associated with a clinically meaningful 10% reduction in major adverse cardiovascular events (MACE).

You do not need to overhaul your entire life to significantly lower your heart disease risk. Instead, focus on making small, manageable improvements in three key areas every day: get 11 extra minutes of sleep, add 4.5 minutes of moderate-to-vigorous exercise (like brisk walking), and improve your diet quality by about 3 points (roughly adding 1/4 cup of vegetables). These modest, combined changes are associated with a 10% lower risk of major cardiovascular events.

Sleep duration has a non-linear (L-shaped or U-shaped) relationship with MACE subtypes, with optimal benefits for heart failure but potential risks for myocardial infarction and stroke at longer durations.

While getting enough sleep (8-9.5 hours) is generally beneficial for heart health, be aware that the relationship between sleep duration and specific heart conditions varies. For heart failure, more sleep is linearly beneficial. For heart attacks and strokes, very long sleep durations might not offer additional benefits and could potentially be linked to other risks. Aim for the 8-9.5 hour range as a general guideline.

In males with type 2 diabetes, higher baseline endogenous total testosterone and lower estradiol levels significantly enhance the reduction of triglycerides achieved through intensive lifestyle intervention.

If you are a man with type 2 diabetes, your baseline testosterone and estradiol levels may dictate how effectively your diet and exercise efforts lower triglycerides. Men with higher testosterone and lower estradiol tend to see bigger improvements in triglycerides from lifestyle changes. This suggests that knowing your hormone profile could help tailor your lifestyle prescription for better lipid outcomes.

In females with type 2 diabetes, higher baseline sex hormone-binding globulin (SHBG) significantly enhances the reduction of LDL cholesterol achieved through intensive lifestyle intervention.

If you are a postmenopausal woman with type 2 diabetes, your baseline SHBG levels may dictate how effectively your diet and exercise efforts lower LDL cholesterol. Women with higher SHBG tend to see bigger improvements in LDL-C from lifestyle changes. This suggests that knowing your hormone profile could help tailor your lifestyle prescription for better lipid outcomes.

Higher baseline total testosterone predicts greater long-term weight loss and waist circumference reduction in both males and females with type 2 diabetes undergoing intensive lifestyle intervention.

If you have type 2 diabetes, your baseline testosterone levels may dictate how effectively your diet and exercise efforts lead to weight loss and waist circumference reduction. Both men and women with higher testosterone tend to see bigger improvements in weight and waist size from lifestyle changes. This suggests that knowing your hormone profile could help tailor your lifestyle prescription for better weight outcomes.

Elevated diabetes-related emotional distress is significantly associated with poorer glycemic control, even among patients who otherwise maintain medication adherence.

Recognize that emotional stress about diabetes can directly worsen blood sugar levels. If you feel distressed, discuss it with your healthcare team. Managing your mental health is as important as managing your diet and medication for achieving good glycemic control.