Browse the evidence

Time-restricted feeding and scheduled physical activity can entrain the skeletal muscle molecular clock, shifting gene expression phases to align with metabolic demands.

Try to align your main meals and workouts with your active hours. For example, eating earlier in the day or exercising before your main meal may help synchronize your muscle clocks. Consistency in timing is key to maintaining metabolic health.

The ventromedial prefrontal cortex (vmPFC) is specifically engaged by the goal-directed system during instrumental learning and decision-making, distinguishing it from the habitual system which relies on stimulus-response associations.

To maintain flexible, goal-oriented behavior (rather than rigid habits), you must actively engage your prefrontal cortex by evaluating the current value of outcomes. This involves consciously linking cues to specific goals and responses, rather than just reacting to stimuli automatically. This cognitive load is necessary for adapting to changing rewards.

Mandatory front-of-package warning labels (e.g., octagonal stop signs) significantly reduce the purchase of unhealthy products and prompt industry reformulation, whereas voluntary or complex labeling systems (e.g., Guideline Daily Amount) have negligible or no effect on consumer behavior.

Support policies that mandate clear, high-contrast warning labels (like Chile's octagonal stop signs) on packaged foods. These labels are proven to reduce the purchase of unhealthy items and force manufacturers to improve recipes. Avoid supporting voluntary or complex labeling systems that fail to change behavior.

Consumer confidence in food safety, healthfulness, sustainability, and authenticity is primarily determined by beliefs about the openness, competence, and care of food chain actors (manufacturers, farmers, retailers, authorities), with openness being the strongest predictor of confidence.

For food producers and policymakers, building consumer confidence requires prioritizing transparency (openness) and demonstrating competence. Since consumers cannot verify health or sustainability claims themselves, they rely on trust in the actors. Therefore, clear, honest communication and proven capability are more critical than the claims themselves.

FTO gene variants are associated with increased energy intake rather than energy expenditure, leading to a 3-4 kg higher body weight and 1.67-fold increased obesity risk in homozygotes.

If you have the FTO risk variant, be aware that you may have a genetic predisposition to eat more. Focus on managing energy intake through mindful eating strategies.

Higher levels of dispositional optimism are associated with a longer life span and greater odds of achieving exceptional longevity (survival to age 85+), independent of demographics, health conditions, and health behaviors.

Cultivating a realistic positive outlook on the future is associated with living significantly longer. This is not about ignoring reality, but about maintaining confidence in your ability to handle challenges. This trait is linked to healthier behaviors like better diet and exercise, which drive the longevity benefit. Since optimism can be learned, engaging in practices that build resilience and positive goal-setting may support a longer life.

Blanket physical activity promotion via direct advice in primary care is ineffective at increasing self-reported physical activity compared to no intervention.

Do not rely on simple 'exercise more' advice in primary care settings as it is ineffective. Instead, use brief negotiation techniques that focus on the patient's own motivations and barriers.

Generalized Anxiety Disorder (GAD) is negatively associated with being overweight, meaning individuals with GAD are less likely to be overweight.

Generalized Anxiety Disorder is associated with a lower likelihood of being overweight. This may be due to the somatic symptoms of anxiety or excessive worry preventing overeating. However, this finding requires confirmation and should not be used to dismiss the health risks of anxiety.

Higher surgical volume (>=15 procedures per 2 months) significantly increases the likelihood of success and reduces specific complications after laparoscopic adjustable gastric banding.

If you are getting a gastric band, choose a high-volume center (>=15 procedures per 2 months). The study shows that patients at these centers have almost twice the chance of success and lower complication rates compared to those at low-volume centers.

The physical activity improvements from a 50-day social networking intervention are not statistically maintained 3 months after the intervention ends.

Be aware that the benefits of a 50-day fitness challenge may fade after you stop. To keep the gains, you likely need to continue some form of tracking, social accountability, or structured activity beyond the initial 50 days.

Moderate alcohol consumption (one to two drinks per day) is associated with a 30-40% lower risk of type 2 diabetes compared to abstinence.

If you already drink alcohol moderately (1-2 drinks/day), this habit is associated with a significantly lower risk of type 2 diabetes compared to not drinking. Do not start drinking for health benefits if you are a non-drinker.

Implementing a small incremental increase in sugar-sweetened beverage (SSB) tax rates (e.g., 13% to 18%) results in only small price increases and small reductions in SSB purchases, which is unlikely to significantly reduce obesity or noncommunicable diseases.

If you are designing public health policy, know that small tax hikes (like 5%) have minimal impact on consumption. To drive significant behavior change, tax rates must be substantial enough to alter shelf prices meaningfully, or they must be part of a broader regulatory strategy.

Decreasing the tax rate on low-sugar or artificially sweetened beverages (L-SSBs) leads to a significant increase in their purchase volume, potentially offsetting the health benefits of reduced high-sugar beverage consumption.

When designing tax policies, lowering taxes on diet drinks can lead to a surge in their consumption. Policymakers must consider if this substitution aligns with broader health goals, as artificial sweeteners may have their own health implications.

Mobility difficulties, pain, depression, and sleep problems are significant mediators explaining the association between chronic conditions/multimorbidity and low physical activity in older adults (≥50 years) in LMICs.

For older adults in LMICs with chronic conditions, simply diagnosing the condition isn't enough to increase physical activity. Healthcare providers must also assess and address mobility difficulties, pain, depression, and sleep problems, as these are the primary barriers preventing activity. Interventions should target these mediators to be effective.

Disproportionate exposure to outdoor advertising for high-calorie, low-nutrient foods and sedentary entertainment in low-income and minority neighborhoods contributes to obesigenic environments and health disparities.

If you live in a neighborhood with high density of fast food and sedentary entertainment ads, your environment is actively working against healthy choices. Focus on environmental strategies: avoid stores with heavy promotional displays of unhealthy items, and support local policies that limit outdoor advertising density in residential zones.

Government policies such as traffic light labeling, import duties on unhealthy foods, and promoting local produce are effective strategies to limit obesity.

Advocate for or support policies that make healthy food more accessible and affordable, such as traffic light labeling and subsidies for local produce.

Obesity is associated with delayed cancer diagnosis and reduced treatment efficacy due to screening biases, technical challenges, and altered drug metabolism.

If you are obese, be proactive about your cancer screening. Inform your provider about your weight so they can use appropriate equipment and techniques. Ensure you receive full doses of chemotherapy and radiation, as obesity can sometimes lead to undertreatment. Advocate for yourself to ensure you get the standard of care.

Current food fortification and dietary supplement programs in the Middle East are sporadic and ineffective, failing to address the high prevalence of micronutrient deficiencies.

Do not rely solely on government food fortification to meet your micronutrient needs, as these programs are inconsistent in the region. You may need to take dietary supplements and get regular blood tests to ensure you are meeting your requirements for vitamins and minerals.

Post-nutritional transition obesity trends exhibit a 'plateau' or stabilization phase after initial rapid rise, making subsequent reduction extremely difficult and requiring highly intensive, comprehensive state-level interventions rather than standard health promotion.

If you are trying to manage weight in a society where obesity has stabilized at high levels, individual effort alone is likely insufficient. You must advocate for and leverage comprehensive environmental changes, such as stricter food marketing regulations and increased access to physical activity, as these are necessary to overcome the 'plateau' effect.

Self-reported dietary monitoring is highly inaccurate, with estimations ranging from 50% under to 50% over actual intake, making it an unreliable tool for weight management.

Stop relying on your memory to track what you eat. Self-reports are notoriously inaccurate, often missing half the calories you consume. To manage weight effectively, you need objective data, not estimates.

In urban food deserts, increasing geographic proximity to full-service supermarkets does not significantly improve dietary quality or reduce BMI because residents already travel outside their neighborhoods to access healthy food.

If you live in a food desert, building a supermarket nearby is unlikely to change your diet or weight because you are already traveling to supermarkets. Focus on interventions that support the existing behavior of traveling to healthy stores (e.g., transportation subsidies, loyalty programs) rather than just building new stores.

Obesity prevalence among nurses in England (25.1%) is significantly higher than among other healthcare professionals (14.4%) and unregistered care workers (31.9%), yet statistically equivalent to the general working population (23.5%).

If you work in healthcare, your professional status does not protect you from obesity. The study shows nurses are just as likely to be obese as the general public. To improve your health and job performance, you must actively manage your weight through diet and exercise, as workplace factors like shift work and limited food options contribute to the problem.

The duration of uninterrupted sedentary bouts (prolonged sitting) is not significantly associated with cancer mortality risk after adjusting for MVPA and other covariates.

Don't stress too much about sitting for long uninterrupted periods if you are already reducing your total daily sitting time. The total volume of sitting is the primary driver of cancer mortality risk in this study, not necessarily how long you sit without moving.

Interventions focusing solely on individual behavior change (diet/exercise education) are relatively ineffective for long-term weight loss in obese populations because they ignore the 'obesogenic environment'.

Telling obese patients to 'eat less and move more' without addressing their access to healthy food and safe exercise spaces is ineffective. Interventions must include environmental modifications (e.g., policy changes, access improvements) alongside individual counseling.