Browse the evidence

Urbanization is a major determinant of obesity in the EMR, associated with decreased physical activity and increased availability of high-fat foods.

If you live in an urban area, be aware that your environment may promote obesity through less activity and more access to fast food. Consciously counteract this by planning physical activity and choosing healthier food options.

Treatment with Bone Morphogenetic Protein 7 (BMP7) induces tissue-resident progenitor cells in skeletal muscle and subcutaneous white fat to differentiate into brown adipocytes expressing UCP1, thereby increasing energy expenditure.

This research identifies a specific protein (BMP7) that can turn fat-storing cells in your muscles and subcutaneous fat into energy-burning brown fat cells. While this is currently a laboratory finding in mice and cell cultures, it suggests that future therapies might target these specific progenitor cells to treat obesity by increasing your body's natural energy expenditure.

Salicylate (the active metabolite of aspirin and salsalate) activates AMPK directly by binding to the beta-1 subunit, independent of AMP/ADP levels, and improves metabolic parameters in subjects with insulin resistance.

Salsalate, a form of salicylate, has been shown in short-term trials to improve blood sugar and insulin levels in people with prediabetes or obesity. It works by directly activating an energy-sensing enzyme (AMPK) in the body. While promising, it is not yet a standard first-line treatment.

Metformin use is associated with a significantly lower incidence of cancer (approx. 30% risk reduction) in type 2 diabetic patients, likely mediated by AMPK activation which suppresses tumor growth.

Taking metformin for diabetes is associated with a lower risk of developing certain cancers, particularly colon and liver cancer. This is a beneficial side effect of the drug, but it should not be used as a primary cancer prevention strategy.

RYGB surgery leads to decreased faecal bile acids and altered energy metabolism, including decreased urinary succinate, 2-oxoglutarate, citrate, and fumarate, indicating modulated mitochondrial function.

Surgery changes how the body processes energy, reducing certain metabolic byproducts in urine. This suggests a shift in how mitochondria function after surgery.

Calorie restriction (CR) extends lifespan in many organisms, and this effect is mediated by Sirtuins, although the requirement for Sirtuins varies by species, strain, and CR protocol.

Consider modest calorie restriction or time-restricted eating as a strategy to potentially activate Sirtuin pathways. Focus on nutrient-dense foods. Be aware that individual responses vary, and extreme restriction is unnecessary and potentially harmful.

In high-income countries, increased per capita caloric supply and higher urbanization rates are positively associated with a higher number of overweight and obese pregnant women, whereas in lower-middle income countries, a higher percentage of female employment in agriculture (indicating higher occupational physical activity) is inversely associated with this burden.

For policymakers and public health officials, this research highlights that reducing maternal obesity requires systemic changes rather than just individual advice. In high-income nations, strategies should focus on managing caloric supply and mitigating the sedentary effects of urbanization. In lower-income nations, supporting agricultural employment or increasing physical activity in service-sector jobs may help counteract obesity trends.

Increasing physical activity has only a weak association with preventing future weight gain in observational studies, and clinical trials provide uncertain conclusions on whether increasing activity effectively prevents obesity de novo.

Current evidence suggests that while physical activity is recommended for general health, relying on it alone to prevent obesity is uncertain due to weak associations and measurement errors in studies. Public health advice remains to advocate for 45-60 minutes of moderate intensity activity daily, but expectations for significant weight prevention should be managed.

Increased caloric intake in non-obese individuals does not replicate the excessive cholesterol secretion seen in obesity.

Eating a lot of calories doesn't automatically make your bile supersaturated if you are not obese. The defect is specific to the obese state, suggesting that body composition, not just current food intake, drives the risk.

Glycogen accumulation allosterically inhibits AMPK activity by binding to its glycogen-binding domain, particularly when glycogen has high branching content.

High muscle glycogen levels can allosterically inhibit AMPK activity, particularly when glycogen has high branching content. This inhibition may help prevent further glycogen synthesis. Balancing glycogen levels is important for metabolic regulation.

Sustainable intensification of livestock production can significantly reduce greenhouse gas emissions per unit of food produced while maintaining or increasing nutritional output.

For producers and policymakers, focusing on sustainable intensification (better genetics, feed, and management) can reduce the environmental footprint of livestock while increasing food security. For consumers, this means that moderate ASF consumption in developing regions is not inherently unsustainable if production methods are improved.

Physical activity interventions alone result in inconsistent improvements in inflammatory markers, likely due to smaller magnitude of weight loss and maintenance of fat-free mass.

Exercise alone may not significantly reduce inflammation if it does not lead to substantial weight loss. Combining exercise with dietary changes is likely more effective for improving inflammatory markers.

Caloric restriction and certain phytochemicals (e.g., resveratrol, curcumin, EGCG) can upregulate FOXO3 activity, leading to improved stress resistance, autophagy, and potentially extended lifespan.

You can support your body's natural longevity genes (like FOXO3) by managing your energy intake and consuming specific plant compounds. Try incorporating moderate caloric restriction or eating foods rich in polyphenols, such as green tea (EGCG), turmeric (curcumin), and resveratrol. These natural compounds help activate cellular repair mechanisms, reduce inflammation, and may protect against age-related diseases.

Gut microbiota composition influences body weight and metabolic health by increasing energy harvest from diet and modulating host fat storage pathways, with obese individuals harboring microbiota that extract more energy from the same diet than lean individuals.

Your gut bacteria act like an external organ that determines how many calories you absorb from food. While you cannot directly see them, their composition affects your weight. Strategies that alter gut flora (like high-fiber diets or specific prebiotics) may help manage weight by changing how efficiently your body extracts energy from food, rather than just reducing intake.

Activation of the AMPK signaling pathway ameliorates fatty liver disease (FLD) by inhibiting lipid synthesis and promoting fatty acid oxidation.

Supporting liver health involves maintaining cellular energy balance. While specific dietary interventions are not detailed in this mechanism review, the activation of AMPK (often associated with energy deficit or exercise) is a key biological mechanism for reducing liver fat. Focus on metabolic health markers rather than just fat intake.

AMPK activation reduces liver fat accumulation by downregulating lipid synthesis genes (FAS, SREBP-1c, ACC, HMGCR) and upregulating fatty acid oxidation genes (CPT1, PGC1, HSL, ATGL).

Understanding the specific genes involved (like CPT1 for burning fat and FAS for making fat) helps explain why metabolic health is complex. Interventions that activate AMPK can shift this balance.

Ethanol consumption inhibits AMPK activity and reduces CPT1 expression, leading to fatty liver disease.

Chronic alcohol consumption disrupts the liver's ability to regulate fat metabolism by inhibiting AMPK. Reducing alcohol intake may help restore this regulatory pathway.

L-carnitine supplementation may be beneficial for treating specific clinical conditions such as heart failure, angina, and oxidative stress, but routine use for general disorders is not yet recommended.

If you have heart conditions like angina or heart failure, L-carnitine might help reduce oxidative stress, but you should not take it routinely without medical advice, as more research is needed.

Mitochondrial fusion is associated with increased longevity and improved metabolic efficiency, whereas unopposed fission (fragmentation) is linked to oxidative stress, reduced ATP production, and accelerated aging phenotypes.

Maintaining mitochondrial health involves supporting the dynamic balance of fusion and fission rather than simply maximizing one process. While specific supplements or exercises are not detailed in this mechanism paper, the evidence suggests that conditions promoting mitochondrial fusion (like moderate caloric restriction or specific genetic pathways) are linked to longevity in model organisms. Focus on general metabolic health markers rather than targeting single mitochondrial proteins in isolation.

Subclinical thiamine deficiency in childhood may have lifelong neurodevelopmental consequences, necessitating urgent public health responses even in the absence of overt clinical symptoms.

In areas where thiamine deficiency is common, ensure children receive adequate thiamine through diet or supplementation, even if they appear healthy, to protect their long-term brain development.

A ketogenic diet (KD) provides neuroprotective benefits in Alzheimer's disease by serving as an alternative energy substrate (ketone bodies) that bypasses impaired glucose metabolism, thereby improving mitochondrial function, reducing oxidative stress, and lowering neuroinflammation.

Adopting a ketogenic diet shifts the brain's fuel source from glucose to ketone bodies, which may help mitigate Alzheimer's progression by improving mitochondrial efficiency and reducing inflammation. This involves consuming a diet with very high fat (approx. 90% of calories) and very low carbohydrates (≤10%). While promising in animal models for reducing amyloid plaques, human clinical data is still emerging, and lipid profiles should be monitored.

Current estimates of brown adipose tissue (BAT) contribution to total energy expenditure are likely significant underestimates because 18FDG PET/CT underestimates true BAT volume, especially in obese individuals.

Standard scans might underestimate your brown fat, especially if you are overweight. This means your body might have more potential for cold-induced calorie burning than currently thought.

Skeletal muscle contributes to facultative thermogenesis in humans through mitochondrial uncoupling, mediated by the thyroid hormone axis and sympathetic nervous system, potentially acting as a major contributor to resting energy expenditure alongside BAT.

Your skeletal muscles also play a role in burning calories at rest, not just during exercise. This process, called mitochondrial uncoupling, is influenced by your nervous system and thyroid hormones. While less studied than brown fat, it suggests that maintaining muscle mass and metabolic health can support your overall energy expenditure.

There is insufficient evidence to determine a dose-response relationship between physical activity and reductions in abdominal or visceral fat.

Do not rely on exercise alone to target belly fat, as increasing exercise volume does not guarantee proportional belly fat loss. While exercise helps reduce total fat, the specific benefit for abdominal or visceral fat is not dose-dependent and may be limited by your starting body composition.