Browse the evidence

Glucocorticoids promote adipocyte differentiation and increase adipocyte size, particularly in visceral and subcutaneous depots, contributing to fat redistribution in Cushing's syndrome.

Chronic steroid exposure changes how fat cells grow and multiply, especially in the belly. This is not just about eating more; the hormones actively encourage fat storage cells to form and expand in specific areas.

Dysbiosis in NASH, specifically decreased abundance of Clostridium leptum and Bacteroidetes, is associated with altered bile acid homeostasis, leading to higher levels of unconjugated primary bile acids.

Your gut bacteria play a direct role in liver health. In NASH, specific beneficial bacteria (like C. leptum) are depleted, which leads to higher levels of potentially toxic primary bile acids in the gut. This suggests that gut health interventions should target these specific microbial deficits to help normalize bile acid metabolism.

Inhibition of mTOR by rapamycin exacerbates metabolic dysfunction in type 2 diabetes by preventing beta-cell adaptation, inducing beta-cell apoptosis, and increasing insulin resistance.

Do not use mTOR inhibitors like rapamycin to treat type 2 diabetes. While these drugs may improve insulin sensitivity in muscle, they destroy pancreatic beta-cells and prevent the pancreas from adapting to high blood sugar, leading to severe worsening of diabetes.

Prenatal exposure to famine at the height of the famine (conception period) is associated with an increased risk of schizophrenia in the offspring.

This finding suggests that severe maternal malnutrition during the peri-conceptional period may disrupt early neurodevelopment, increasing the risk of schizophrenia. It underscores the importance of optimal nutrition before and during early pregnancy for long-term mental health.

Heritability of longevity increases with age, reaching its highest levels in centenarians, suggesting that genetic factors become more dominant in determining survival at extreme ages.

While lifestyle matters for everyone, genetic factors play an increasingly important role in who survives to extreme old age (100+). This suggests that for those aiming for extreme longevity, genetic predisposition is a significant, albeit non-modifiable, factor.

A composite panel of seven circulating senescence-associated secretory phenotype (SASP) proteins (GDF15, FAS, OPN, TNFR1, ACTIVIN A, CCL3, and IL-15) serves as a superior biomarker for predicting adverse postoperative outcomes and biological age compared to chronological age or single-protein markers.

This research suggests that measuring a specific set of 7 proteins in the blood (GDF15, FAS, OPN, TNFR1, ACTIVIN A, CCL3, and IL-15) can provide a more accurate assessment of biological age and surgical risk than chronological age. For older adults, this panel may help identify those at higher risk for complications after surgery, potentially guiding pre-operative care and post-operative monitoring.

In utero exposure to maternal hyperglycemia (gestational diabetes or elevated glucose levels) independently increases the risk of abnormal glucose tolerance, obesity, and higher blood pressure in offspring by age 7, independent of maternal pre-pregnancy BMI, birth weight, or childhood obesity.

If a mother has gestational diabetes or elevated blood sugar during pregnancy, her child is at a higher risk for metabolic issues like obesity and glucose intolerance by age 7, regardless of the child's birth weight. This risk is biological and programmed in utero. Parents should be aware of this increased risk and prioritize regular metabolic health monitoring (blood pressure, glucose, weight) for their children, especially if there is a family history of diabetes.

Genetic overexpression of Wnt10b in adipose tissue inhibits the development of both white and brown adipose tissue, resulting in reduced total body fat and resistance to diet-induced obesity without causing lipodystrophic diabetes.

This research highlights a specific genetic pathway (Wnt10b) that, when active, prevents fat storage and improves metabolic health. While you cannot genetically engineer your body to overexpress Wnt10b, the findings suggest that maintaining healthy insulin sensitivity and avoiding excessive fat accumulation can prevent the metabolic complications often associated with obesity. Focus on sustainable lifestyle habits rather than seeking quick fixes, as metabolic health is preserved even with lower fat mass if other factors are managed.

Central nervous system (CNS) leptin signaling is sufficient to regulate body weight, feeding, energy expenditure, and glucose metabolism, independent of peripheral leptin action.

Leptin works primarily in the brain, not directly on fat or muscle tissue, to control metabolism and blood sugar.

PGC-1α regulates ANT1 protein content, which influences submaximal ADP-stimulated respiration and intrinsic mitochondrial function.

Maintaining PGC-1α levels through exercise may support efficient energy exchange in mitochondria, potentially improving metabolic efficiency.

High levels of sedentary behavior are NOT associated with an increased risk of breast, rectal, ovarian, prostate, stomach, esophageal, testicular, renal cell, or non-Hodgkin lymphoma cancers.

While high sedentary behavior is linked to colon, endometrial, and lung cancers, it does not appear to increase the risk of breast, prostate, ovarian, or other cancers. However, reducing sedentary time is still beneficial for overall health and may help mitigate the risks for the cancers that are associated with it.

Metformin extends lifespan in C. elegans by inducing mitohormesis, a process where partial inhibition of mitochondrial complex I increases ROS production, which is translated into a longevity signal by the peroxiredoxin PRDX-2.

This research suggests that the longevity benefits of metformin in worms are driven by a specific stress-response pathway (mitohormesis) involving ROS and the protein PRDX-2. While this provides a mechanistic explanation for metformin's effects in a model organism, it does not directly translate to a human dosing protocol or guarantee similar lifespan extension in humans without further clinical validation.

Fasting-induced PGC-1α activation of the nuclear receptor FXR reduces plasma triglyceride levels in wild-type mice, a mechanism absent in FXR-null mice.

Fasting is a powerful tool for lowering triglycerides, but its effectiveness relies on a functional FXR pathway. If you have genetic variations affecting this receptor, fasting might not lower your triglycerides and could potentially raise them. This mechanism highlights why individual responses to fasting vary.

Early life nutritional environments (maternal undernutrition, high fat, or obesity) induce persistent epigenetic modifications (DNA methylation, histone changes) in offspring, programming them for increased risk of metabolic disorders, insulin resistance, and obesity in later life.

Focus on maternal health before and during pregnancy. Ensure adequate intake of methyl donors (folate, B12, choline) and avoid excessive weight gain or severe restriction. This is the most critical window for setting the child's metabolic health trajectory.

SIRT1 deficiency or inhibition leads to increased hepatic oxidative stress and inflammation by failing to deacetylate FOXO transcription factors and NF-kappaB, promoting the progression from steatosis to steatohepatitis.

Fatty liver isn't just about fat storage; it triggers inflammation and oxidative stress that damage the liver further. SIRT1 helps mitigate this by regulating antioxidant and anti-inflammatory pathways. Maintaining metabolic health supports these protective mechanisms.

A ~187 kb microdeletion of the HBII-85 snoRNA cluster on chromosome 15q11-13 causes hyperphagia, severe obesity, and hypogonadism in humans.

This paper identifies a specific genetic cause for severe obesity and hyperphagia. For individuals with a confirmed HBII-85 deletion, standard dietary advice may be insufficient due to biological hyperphagia. Management requires specialized medical and endocrine support rather than standard lifestyle interventions alone.

Probiotic therapy does not significantly affect body mass index (BMI), blood glucose (GLU), or low-density lipoprotein (LDL) levels in NAFLD patients.

Do not expect probiotics to help you lose weight or lower your LDL cholesterol if you have fatty liver. They may help your liver enzymes and inflammation, but for weight and cholesterol management, you still need to focus on diet and exercise.

In human postmenopausal women, circulating Retinol-Binding Protein 4 (RBP4) levels do not increase with obesity and are not correlated with insulin resistance, contradicting the rodent model where adipose RBP4 drives systemic insulin resistance.

Current evidence suggests that simply having higher body weight does not automatically lead to higher levels of RBP4 in human women, nor does it directly dictate insulin resistance through this specific pathway. Focus on proven lifestyle interventions for metabolic health rather than targeting this specific protein marker.

In humans, adipose tissue RBP4 expression is positively correlated with GLUT4 expression, whereas in rodents, they are inversely correlated, indicating a fundamental species difference in RBP4 regulation.

The biological link between glucose uptake (GLUT4) and RBP4 production is different in humans than in mice. This highlights why animal studies cannot always be directly translated to human obesity treatments.

CoQ10 supplementation (2400 mg/day) is safe and well-tolerated in patients with early-stage Huntington's disease, but does not slow functional decline.

If you or a family member has early-stage Huntington's disease, high-dose CoQ10 (2400mg/day) is safe but has not been shown to slow the disease's progression. Do not rely on it as a treatment for slowing decline.

Physical activity does not reduce the risk of rectal cancer in either males or females.

While exercise is excellent for preventing colon cancer, do not rely on it to prevent rectal cancer. The protective effect seen in the colon does not extend to the rectum. Maintain other preventive measures for rectal health.

Hyperinsulinemia and hyperglycemia directly increase resistin mRNA expression and serum levels in wild-type mice, indicating that insulin and glucose are key regulators of resistin production.

High insulin and glucose levels directly stimulate the production of resistin. Managing blood sugar and insulin levels through diet and exercise can help keep resistin levels in check.

Macrophage polarization towards the M1 pro-inflammatory phenotype is driven by glycolysis and the accumulation of TCA cycle intermediates (succinate, itaconate), which promotes the production of inflammatory cytokines (IL-1β) and contributes to metabolic disease.

Chronic low-grade inflammation, driven by immune cells like macrophages, is a key factor in metabolic disease. Supporting a healthy gut microbiome helps prevent the metabolic reprogramming of immune cells that leads to this inflammation.

Rapamycin inhibits the senescence-associated secretory phenotype (SASP) and reduces SA-β-gal staining in senescent cells through a mechanism independent of the Nrf2 pathway, likely involving Stat3 inhibition.

Rapamycin reduces the harmful inflammatory output (SASP) of aging cells without necessarily stopping them from dividing, and it does this via a pathway separate from the antioxidant response (Nrf2). This suggests that therapies targeting inflammation in aging might not need to address cell cycle arrest directly.