Browse the evidence

Restrictive hypocaloric diets and bariatric surgery reduce total gut microbial abundance and decrease butyrate-producing bacteria (Firmicutes, Lactobacillus, Bifidobacterium), which may have long-term detrimental effects on the colon despite promoting weight loss.

While restrictive diets and bariatric surgery are effective for weight loss, they can negatively impact your gut microbiome by reducing beneficial bacteria that produce butyrate. To mitigate this, consider incorporating prebiotics or specific probiotics, which the review notes may restore a healthy microbiome and reduce body fat, rather than relying solely on caloric restriction or surgery for gut health.

Prebiotics and probiotics can positively modulate gut microbiota by increasing butyrate producers and reducing body fat, offering a potential alternative or adjunct to restrictive diets and surgery for improving metabolic outcomes.

If you are looking to support your gut health and potentially reduce body fat without drastic dietary changes or surgery, consider trying specific prebiotics and probiotics. The review suggests they can increase beneficial bacteria and reduce body fat, though results depend on the specific strain and duration of use.

High polygenic scores for obesity or type 2 diabetes significantly increase disease risk but are currently weak predictors of individual outcomes, necessitating the integration of lifestyle and environmental factors for accurate risk assessment.

Do not rely on direct-to-consumer genetic tests to predict your weight or diabetes risk. While you may have a higher genetic predisposition, these tests are currently poor predictors of individual outcomes. Focus on modifiable factors like diet, physical activity, and sleep, as these environmental factors interact with your genetics to determine your actual health status. Personalized care requires combining genetic insights with lifestyle data, not just genetics alone.

Mechanical vibration therapy (low frequency, low intensity) inhibits bone loss and improves bone density in postmenopausal women, particularly at the femur.

If you cannot perform high-impact exercise due to joint issues or fracture risk, consider using a whole-body vibration platform (30 Hz, low intensity) for 8-12 weeks. It can help maintain bone density, especially in the hips, and improve balance. However, it should be used as a supplement to, not a replacement for, active exercise and strength training whenever possible.

Speed endurance training (SET), characterized by high lactate and hydrogen ion accumulation, specifically upregulates the Na+/H+ exchanger isoform 1 (NHE1) and Na+/K+-ATPase beta2-subunit, whereas sprint training (ST) does not, suggesting that intracellular acidosis is a key stimulus for these specific ion transport adaptations.

To improve your muscle's ability to handle fatigue during repeated high-intensity efforts, you need to train in a way that creates significant acidosis (low pH). Short sprints alone may not trigger the specific ion pump adaptations needed for this; longer high-intensity intervals (speed endurance) that push lactate and hydrogen ions higher are required to upregulate the specific transporters that manage fatigue.

Higher habitual intake of anthocyanins is associated with a significantly lower risk of nonfatal myocardial infarction in men, with the protective effect being stronger in normotensive individuals.

For men looking to reduce their risk of nonfatal heart attacks, increasing habitual intake of anthocyanin-rich fruits (like blueberries, blackberries, cherries, and red grapes) is a viable strategy. The benefit appears most pronounced in men with normal blood pressure. While this won't necessarily prevent fatal heart attacks or strokes, it is a low-risk dietary addition that aligns with broader cardiovascular health goals.

Higher habitual intake of flavanones is associated with a significantly lower risk of ischemic stroke in men, particularly in those aged 65 years and older.

Men over the age of 65 can potentially lower their risk of ischemic stroke by increasing their habitual intake of flavanone-rich citrus fruits, such as oranges, grapefruits, and lemons. The study indicates that this benefit is specific to ischemic stroke and is most evident in this older demographic. Incorporating more whole citrus fruits into the daily diet is a practical way to achieve this.

Females and males experience similar relative increases in muscle hypertrophy and lower-body strength when following the same resistance training protocol, but females exhibit a significantly larger relative increase in upper-body strength.

If you are a female starting resistance training, do not expect your absolute strength numbers to match males, but expect your relative improvements in upper-body strength to be greater than males. For muscle size and lower-body strength, your relative progress will be on par with males. Stick to the same training protocols used by males; you do not need a different program to see excellent results.

Higher dietary intake of heme-iron is associated with an increased risk of developing type 2 diabetes.

High intake of heme-iron (found in red meat) is linked to a higher risk of type 2 diabetes. Consider diversifying your protein sources to include more plant-based or poultry options to manage your heme-iron intake, especially if you have other risk factors for diabetes.

Hunter-gatherer populations exhibit very low prevalence of obesity and metabolic diseases (such as type 2 diabetes and hypertension) despite high physical activity levels, suggesting that lifestyle factors beyond simple energy balance (e.g., diet composition, pathogen load) are critical for metabolic health.

Adopting a lifestyle with high physical activity and whole-food diets can significantly reduce the risk of obesity, diabetes, and hypertension, even into old age. Focus on maintaining muscle mass and activity levels rather than fearing these diseases as inevitable.

Multi-component non-pharmacological sleep therapy (including cognitive behavioral therapy, sleep restriction, bright-light therapy, and body temperature manipulation) reverses the neurocognitive vigilance deficits associated with chronic primary insomnia, normalizing reaction time profiles to match healthy controls.

If you suffer from chronic insomnia, cognitive behavioral sleep therapy combined with sleep restriction, bright light exposure, and body temperature manipulation can reverse the brain fog and vigilance deficits associated with the condition. This multi-component approach, delivered over 6 weeks, normalizes cognitive performance to levels seen in healthy sleepers, suggesting that insomnia-related cognitive issues are treatable and not permanent.

Untreated sleep-disordered breathing (SDB), particularly obstructive sleep apnea (OSA), is an independent risk factor for incident stroke and recurrent vascular events, with risk increasing with apnea-hypopnea index (AHI).

If you snore loudly or feel excessively sleepy during the day, get tested for sleep apnea. Treating it with CPAP or other therapies can significantly lower your risk of having a stroke or having another one if you've already had one. It is not just 'bad breathing'; it is a direct threat to your cardiovascular health.

Obesity (BMI ≥ 30 kg/m²) is associated with a significantly higher risk of developing new musculoskeletal symptoms and a significantly lower rate of recovery from existing symptoms compared to normal weight, with the strongest effects observed in the lower extremities.

If you are overweight or obese, you face a higher risk of developing musculoskeletal pain (especially in knees, hips, and back) and are less likely to recover from it compared to those with a normal weight. This risk exists even if you are physically active. Managing body weight is a key strategy for preventing and recovering from musculoskeletal issues, particularly in the lower body.

The association between high BMI and musculoskeletal symptoms is modified by physical workload, being stronger in employees with low physical workload than in those with high physical workload, particularly for lower extremity symptoms.

If you have a sedentary job, carrying extra weight poses a significantly higher risk for joint pain (especially in legs/knees) than if you have a physically demanding job. This might be because physical work builds muscle that protects joints. However, obesity still increases risk in high-workload jobs, just less dramatically.

Sleep irregularity, measured by the Sleep Regularity Index (SRI), is significantly associated with increased cardiometabolic risk, including higher 10-year atherosclerotic cardiovascular disease (ASCVD) risk, obesity, hypertension, and markers of type 2 diabetes (fasting glucose, HbA1c), independent of sleep duration.

Track your sleep consistency, not just duration. Use a wearable or app to calculate your Sleep Regularity Index (SRI) or simply aim to go to bed and wake up at the same time every day, including weekends. This consistency is linked to lower risks of heart disease, diabetes, and obesity, independent of how many hours you sleep.

Phase-sensitive 8-electrode segmental bioelectrical impedance analysis (BIA) provides high-accuracy predictions of whole-body and segmental skeletal muscle mass (SMM) comparable to MRI, with no significant difference in goodness-of-fit between standing and supine measurement positions.

For accurate tracking of muscle mass without expensive MRI scans, use a medical-grade, phase-sensitive, 8-electrode segmental BIA device. Ensure you follow the manufacturer's protocol for either standing or supine measurement, as both are equally accurate with this technology. Do not rely on simple wrist-ankle consumer scales for precise muscle mass estimation, as they are less accurate.

Higher adherence to a plant-based dietary index (high plant foods, low animal foods) is associated with lower longitudinal insulin resistance, lower risk of prediabetes, and lower risk of type 2 diabetes.

Adopt a diet that emphasizes plant foods (vegetables, fruits, whole grains, nuts, legumes) and reduces animal foods (meat, dairy, eggs). You do not need to be strictly vegan. Increasing your plant-based score by 10 units (e.g., more fruits/vegetables, less red meat) is associated with a 13-18% lower risk of developing type 2 diabetes and lower insulin resistance. Ensure your plant foods are high quality (whole grains, not sweets).

Short sleep duration (≤5 hours) is associated with increased mortality in elderly adults (60-86 years) but not in middle-aged adults (32-59 years) after adjusting for covariates.

If you are over 60, ensure you are getting at least 7 hours of sleep. Short sleep (≤5 hours) is linked to higher mortality in your age group, likely due to underlying health issues. For middle-aged adults, the link is less clear, but 7 hours remains the optimal baseline.

The A Body Shape Index (ABSI) provides superior mortality risk stratification compared to BMI and other waist indices (WC, WHR) because it is designed to be independent of BMI, allowing for the identification of high-risk individuals within all BMI categories, including underweight and obese groups.

Use the A Body Shape Index (ABSI) instead of just BMI or waist circumference to assess your mortality risk. ABSI accounts for your waist size relative to your height and weight in a way that BMI cannot. If you have a high ABSI, you are at higher risk of death regardless of whether you are underweight, normal weight, or obese. This metric helps identify people who might be missed by BMI alone, allowing for more personalized screening and monitoring.

Bariatric surgery leads to significant pain relief in knee and back pain for morbidly obese patients, often resolving pain in 5-100% of patients depending on the joint.

For morbidly obese individuals, bariatric surgery can significantly reduce or eliminate knee and back pain, often within months. However, hip pain may not improve as much.

Roux-en-Y gastric bypass (RYGB) provides superior long-term type 2 diabetes (T2DM) remission, lower relapse rates, and better glycemic control compared to sleeve gastrectomy (SG) in real-world clinical settings.

If you have Type 2 Diabetes and are considering bariatric surgery, Roux-en-Y Gastric Bypass (RYGB) is associated with better long-term diabetes remission and lower relapse rates compared to Sleeve Gastrectomy (SG). While SG is a common procedure, RYGB may offer superior metabolic benefits for diabetes management, though it involves a more complex surgery. Discuss these long-term outcomes with your surgeon to make an informed choice.

Baseline malnutrition, diagnosed via GLIM or ESPEN criteria, is a strong predictor of developing sarcopenia or severe sarcopenia within four years in community-dwelling older adults.

If you are an older adult, your nutritional status is a key predictor of whether you will lose muscle mass. Being malnourished (defined by criteria like low BMI, weight loss, or low muscle mass) increases your risk of developing sarcopenia by 3-4 times over four years. Focus on maintaining adequate nutrition, including protein intake, as a primary strategy to prevent muscle loss, rather than viewing muscle loss as inevitable.

Higher BMI categories (overweight and obesity classes I-III) are significantly associated with impaired health-related quality of life (HRQL), including worse general health status and more unhealthy days, mediated by joint pain and obesity-related comorbidities.

Maintaining a healthy weight is crucial for your daily quality of life. Higher BMI is linked to more pain, chronic conditions, and fewer healthy days. Focus on sustainable lifestyle changes to manage weight and reduce these risks.

Weight cycling (repeated weight loss and regain) is associated with a 1.25 to 2.00 relative risk increase in all-cause mortality and coronary heart disease (CHD) mortality compared to stable weight.

If you have experienced weight cycling, do not stop trying to lose weight. The mortality risk associated with weight cycling (1.25-2.00x) is similar to the risk of obesity itself. Focus on maintaining weight loss and improving health markers rather than fearing the natural fluctuations that occur during dieting.