Browse the evidence

Hormonal regulation of energy balance involves AMPK in the hypothalamus, where ghrelin activates it to promote feeding and leptin inhibits it to suppress feeding.

Your brain uses AMPK to decide when to eat based on hormonal signals. Ghrelin (fasting hormone) turns AMPK on to make you hungry, while leptin (satiety hormone) turns it off. Disruptions in this signaling can lead to overeating.

Working quick returns (less than 11 hours between shifts) is not associated with increased anxiety or depression.

While quick returns significantly increase your risk of sleep disorders, they do not appear to directly increase your risk of anxiety or depression. Focus on managing your sleep and fatigue rather than assuming your mental health struggles are directly caused by your schedule.

Chronic activation of c-Jun N-terminal kinase (JNK) by elevated free fatty acids and pro-inflammatory cytokines during obesity causes insulin resistance and beta-cell dysfunction, leading to type 2 diabetes.

Obesity triggers a specific inflammatory response (JNK activation) that blocks insulin action. Managing obesity to reduce free fatty acids and inflammation is critical to preventing this molecular blockage.

The FTO obesity susceptibility haplotype (tagged by rs8050136 risk allele A) is associated with increased DNA methylation levels within a 7.7 kb region containing a long-range enhancer for IRX3, driven by CpG-creating SNPs.

This research highlights that carrying the FTO risk variant is linked to higher methylation in a region that regulates the IRX3 gene, which is involved in energy balance. While this is a biological mechanism rather than a lifestyle tip, it suggests that the risk allele's effect might be mediated through gene regulation (epigenetics) rather than just protein function. This implies that environmental factors influencing methylation could theoretically interact with this genetic risk.

Overexpression of the transcriptional coactivator PGC-1α in skeletal muscle increases glucose uptake and glycogen storage while suppressing glycolytic flux, thereby preventing glycogen depletion during exercise.

PGC-1α is a key protein induced by exercise that helps muscles store more glycogen and take up more glucose. This mechanism helps prevent glycogen depletion during exercise and aids in recovery. While you cannot directly 'dose' PGC-1α, engaging in exercise that induces PGC-1α (like endurance or high-intensity training) supports this metabolic adaptation.

Obese gut microbiota reduces the capacity to metabolize ethanolamine, leading to its accumulation in the gut, which triggers a molecular cascade (ARID3a/miR-101a-3p/Zo1) that weakens intestinal barriers, causing leaky gut, systemic inflammation, and glucose metabolic dysfunction.

If you are obese or have type 2 diabetes, your gut microbiome may be failing to break down ethanolamine, leading to gut leakiness and inflammation. Supporting your gut with probiotics that specifically metabolize ethanolamine may help restore gut barrier function and improve metabolic health. Focus on dietary patterns that support a diverse microbiome.

Adipose tissue-specific deletion of AMPK alpha subunits impairs cold-induced thermogenesis and mitochondrial biogenesis in inguinal white adipose tissue, leading to cold intolerance and exacerbated obesity on a high-fat diet.

This finding underscores the importance of maintaining healthy metabolic signaling in fat cells. While you cannot delete your AMPK genes, regular physical activity is known to activate AMPK, potentially supporting the browning of fat and metabolic health.

CD38 deficiency enhances energy expenditure and resting metabolic rate, independent of physical activity levels.

Even without exercising more, your body can burn more calories if your cellular machinery (mitochondria) is optimized. This study shows that removing CD38 boosts mitochondrial function and energy burning. This suggests that supporting mitochondrial health is key to weight management.

Between 1999 and 2007, French adults significantly decreased consumption of traditional starchy foods (bread, potatoes) and dairy products, while increasing consumption of rice, pasta, fruits, vegetables, and chocolate.

If you are in France or a similar Western European context, expect that traditional staples like bread and potatoes are being replaced by rice and pasta, and that dairy intake is dropping while fruit, vegetable, and chocolate consumption is rising. This shift represents a move toward a 'mixed' European diet rather than a purely Mediterranean one.

Despite significant shifts in food group consumption, the overall mean energy intake of French adults remained stable between 1999 and 2007.

Changing what you eat (e.g., swapping bread for rice) does not necessarily change your total calorie intake. To manage weight, you must focus on total energy balance, not just food quality or type.

Endothelial cell CD36 acts as a gatekeeper for tissue fatty acid uptake; its deletion reduces lipid accumulation in heart and muscle, which shifts tissue metabolism toward glucose utilization and improves systemic insulin sensitivity.

This research suggests that how your body transports fat (specifically via endothelial CD36) influences your insulin sensitivity. While you cannot directly 'dose' this gene, the findings imply that strategies which reduce excessive lipid accumulation in muscle (lipotoxicity) may improve insulin sensitivity. This supports the concept that metabolic health is heavily dependent on tissue fuel selection (fat vs. glucose) rather than just caloric intake.

Women live longer than men globally, but this survival advantage is offset by a higher prevalence of disability and age-related diseases in later life, resulting in similar healthy life expectancy between genders.

Do not assume that living longer means you are healthier. Women, on average, live about 5.5 years longer than men in the EU, but they spend those extra years managing chronic diseases and disability. The goal for both genders should be extending 'healthy life expectancy' (years free from activity limitation), which is currently similar for men and women. Focus on preventing age-related diseases rather than just extending lifespan.

Chronic endoplasmic reticulum (ER) stress and the resulting activation of the unfolded protein response (UPR) drive hepatic steatosis and insulin resistance by dysregulating lipid metabolism transcription factors (SREBP-1c, PPARγ) and promoting de novo lipogenesis.

If you are struggling with fatty liver or insulin resistance, reducing the cellular stress on your liver (often caused by high sugar/fat intake) may be more effective than just counting calories. Focus on reducing nutrient overload to allow normal protein folding and lipid regulation.

Oral administration of the ghrelin mimetic MK-677 (25 mg daily) significantly increases fat-free mass and intracellular water in healthy older adults (60-81 years) by enhancing pulsatile growth hormone secretion, without improving muscle strength or physical function.

For healthy older adults, taking 25mg of MK-677 daily for a year will increase lean body mass by about 1.1 kg compared to placebo, largely due to increased intracellular water. However, this increase in mass does not translate to stronger muscles or better physical function. Users should be aware of potential side effects including increased appetite, mild edema, and a measurable decrease in insulin sensitivity (higher fasting glucose).

Adipocyte-specific inactivation of glucocorticoids via 11β-HSD2 overexpression protects against diet-induced obesity by reducing fat mass, decreasing food intake, and increasing energy expenditure.

This research suggests that how your body handles stress hormones (glucocorticoids) within fat cells is crucial for weight management. While this specific genetic modification isn't a current human treatment, it highlights that local tissue health and hormone metabolism are key factors in obesity, potentially offering future therapeutic targets for metabolic syndrome.

Genetic variants associated with excessive daytime sleepiness cluster into two distinct biological subtypes: 'sleep propensity' (linked to higher sleep efficiency and morning chronotype) and 'sleep fragmentation' (linked to lower sleep efficiency and insomnia symptoms).

If you struggle with daytime sleepiness, recognize that your experience may stem from one of two genetic predispositions: high sleep drive (propensity) or poor sleep continuity (fragmentation). Those with high propensity may benefit from circadian alignment (morning light), while those with fragmentation may need to address sleep quality or underlying disorders like apnea, rather than just increasing total sleep time.

Higher Body Mass Index (BMI) has a putative causal effect on increased daytime sleepiness, as determined by Mendelian Randomization analysis.

If you are overweight, your increased daytime sleepiness may be biologically driven by your BMI, not just your habits. Weight management strategies may help reduce sleepiness, but be aware that the relationship is causal and may require addressing metabolic or circadian dysfunction.

Genetic risk for daytime sleepiness shares significant genetic overlap with psychiatric traits (neuroticism, depression, bipolar disorder) and coronary heart disease, independent of BMI.

Daytime sleepiness may be a marker for broader health risks, including heart disease and mental health conditions. Managing sleepiness might also be part of a broader strategy to mitigate these shared genetic risks.

Gut-derived lipopolysaccharides (LPS) translocate across a dysfunctional intestinal barrier into the portal circulation, where they activate the TLR4 signaling pathway in liver cells, driving inflammation and fibrosis in NAFLD and ALD.

For individuals with fatty liver disease, the health of the gut barrier is directly linked to liver inflammation. Maintaining gut integrity through a balanced diet (like the Mediterranean diet) and potentially using targeted therapies (like probiotics or IAP) may help reduce liver damage by preventing harmful bacterial products (LPS) from entering the bloodstream and triggering liver inflammation.

Recombinant human growth hormone (rhGH) supplementation does not augment muscle strength gains in elderly men undergoing resistance training, despite increasing lean body mass and decreasing fat mass.

If you are an older man looking to get stronger, resistance training is the most effective strategy. Taking growth hormone will not give you extra strength gains compared to training alone, even though it might change your body composition slightly. Do not rely on GH for strength; focus on progressive resistance exercise.

Use of proton pump inhibitors (PPIs) or genetic achlorhydria promotes the progression of alcoholic liver disease, non-alcoholic fatty liver disease (NAFLD), and non-alcoholic steatohepatitis (NASH) by inducing overgrowth and translocation of intestinal Enterococcus species to the liver.

If you have liver disease (alcoholic or fatty) and take acid-reflux medication like omeprazole, discuss with your doctor whether you still need it. This research shows these drugs can worsen liver damage by allowing harmful gut bacteria to reach the liver. Do not stop medication abruptly without medical advice, but be aware that long-term use may carry liver risks.

High-fat diets contribute to positive energy balance by increasing hunger levels and reducing 24-hour plasma leptin concentrations, unlike high-carbohydrate meals.

Be aware that high-fat meals can increase your hunger and reduce satiety hormones like leptin more than high-carb meals. This makes it harder to stop eating. Prioritize foods that support satiety signaling rather than just counting calories.

Testosterone substitution normalizes elevated serum leptin levels in hypogonadal men, with the androgen-to-estrogen ratio serving as the primary determinant of leptin production.

If you are a man with clinically low testosterone, your body may be producing excess leptin, which can interfere with weight management and metabolic health. Restoring testosterone to normal levels through medical substitution therapy can normalize these leptin levels, potentially improving your body's ability to regulate energy balance and fat storage.

Intense competition (five 5-min bouts) induces significant physiological stress (decreased testosterone, alkali reserve, FFA) and psychological fatigue regardless of prior dietary restriction.

Prepare for the physiological toll of competition, not just the technical aspects. A full tournament of multiple bouts will significantly drop your testosterone and metabolic reserves even if you are well-fed. Recovery strategies should focus on post-competition hormonal and metabolic restoration, not just pre-competition weight management.