Browse the evidence

Roux-en-Y gastric bypass (RYGB) surgery selectively reduces neural activation in the mesolimbic reward pathway and desire to eat in response to high-calorie food cues, independent of restrictive or malabsorptive mechanisms.

Bariatric surgery changes how your brain processes the reward of high-calorie foods, reducing the desire to eat them. This isn't just willpower or stomach size; it's a biological shift in reward signaling. This insight suggests that future non-surgical treatments could target these same neural pathways to help manage cravings.

Long-term adherence to strict low-carbohydrate, high-fat diets may increase cardiovascular risk factors, including plasma homocysteine levels and potentially insulin resistance, due to elevated circulating free fatty acids.

Be cautious with strict low-carb, high-fat diets over the long term. They may raise homocysteine and potentially insulin resistance. Monitor your blood work and consider balancing fat intake with unsaturated fats or increasing protein to mitigate risks.

Blocking IL-6 trans-signaling (but not classical signaling) using soluble gp130 (sgp130) or anti-IL-6R antibodies can prevent muscle wasting in cachexia without impairing beneficial immune responses.

For patients with severe muscle wasting due to disease, emerging treatments focus on blocking specific inflammatory pathways (trans-signaling) rather than broadly suppressing the immune system. This approach aims to stop muscle loss while preserving necessary immune defenses. Consult an oncologist or specialist for eligibility for such targeted therapies.

Human exposure to endocrine-disrupting compounds (EDCs) found in aquatic environments and drinking water is linked to serious health effects including infertility, thyroid dysfunction, early puberty, endometriosis, diabetes, and obesity.

Be aware that endocrine disruptors like BPA, phthalates, and pesticides are present in water supplies globally. While immediate toxicity is low, long-term accumulation is a concern. Reducing exposure to plastics and processed foods may help minimize intake of these compounds.

Paracetamol use in patients with T2DM and Non-Alcoholic Fatty Liver Disease (NAFLD) carries a heightened risk of hepatotoxicity due to shared metabolic pathways and reduced clearance.

If you have diabetes and take paracetamol regularly for joint pain, ask your doctor to check your liver enzymes. Your liver may process the drug differently if you have fatty liver disease, increasing the risk of damage even at standard doses.

Chronic hyperinsulinemia reduces lifespan and healthspan by suppressing autophagy and antioxidant defenses (Nrf2) while promoting cellular senescence and cardiovascular damage.

To promote longevity, minimize chronic insulin exposure. This supports practices like intermittent fasting, low-carbohydrate diets, and regular exercise, all of which lower baseline insulin. In animal models, lowering insulin extends lifespan; in humans, low insulin levels are associated with healthy aging in nonagenarians.

DHA improves endothelial function and arterial compliance more effectively than EPA, potentially through mechanisms involving membrane fluidity and nitric oxide release.

For vascular health, DHA is likely more beneficial than EPA. It helps improve how your blood vessels dilate and respond to stress, which may protect against atherosclerosis. Look for DHA-dominant supplements for these specific vascular benefits.

Myostatin inhibitors (e.g., neutralizing antibodies, soluble receptor decoys) increase muscle mass and strength but are associated with significant side effects, limiting their current utility.

Myostatin inhibitors are investigational drugs that can increase muscle mass and strength but are currently limited by significant side effects like fatigue, confusion, and muscle contractions. They are not yet standard treatments.

Host genetic variants in the FHIT, TDRG1, and ELAVL4 genes are significantly associated with the abundance of specific adiposity-linked fecal microbes, suggesting host genetics mediate the microbiome-obesity link.

This finding explains why two people might have different gut bacteria for the same diet, due to their genetics. It does not currently offer a direct action for weight loss but highlights that personalized medicine approaches may be necessary for microbiome-based therapies.

Diet-induced weight loss in individuals with metabolic syndrome reduces sympathetic nerve activity by altering the firing pattern of single vasoconstrictor fibers (decreasing firing rate, probability, and multiple firing incidence), rather than solely by reducing the recruitment of active fibers.

If you have metabolic syndrome, losing weight through a calorie-restricted diet (specifically a DASH-style diet) does more than just shrink fat cells; it fundamentally reprograms your nervous system's stress signals. This reprogramming slows down the firing rate and frequency of the nerves that constrict blood vessels, directly lowering blood pressure and heart rate. This suggests that weight loss is a potent 'nerve-calming' therapy for metabolic health.

Obstructive sleep apnoea syndrome (OSAS) is associated with abnormal lipid peroxidation, specifically higher levels of oxidized LDL and increased susceptibility to oxidation, which contributes to cardiovascular disease risk.

If you have severe sleep apnoea, your body is experiencing increased oxidative stress on your blood vessels, which raises your risk of heart disease. Using CPAP therapy for more than a year can significantly improve the susceptibility of your LDL to oxidation, potentially mitigating this risk. It is crucial to adhere to CPAP treatment to manage these metabolic effects.

DNA methylation at the CD38 locus is positively associated with BMI and waist circumference, potentially linking immune function (CD38 expression) to metabolic traits.

This finding suggests a link between immune system activity (specifically CD38) and body weight. While you cannot directly target this methylation site, maintaining immune health through anti-inflammatory diets and regular activity may support healthy metabolic function.

DNA methylation at the PHGDH locus is associated with BMI, potentially linking serine biosynthesis pathways to obesity.

This research identifies a link between the serine biosynthesis pathway (PHGDH) and body weight. While not yet a target for intervention, it highlights the importance of balanced nutrition in supporting metabolic enzyme function.

Long-term cross-sex hormone therapy does not increase the occurrence of cardiovascular events (myocardial infarction, DVT, cerebrovascular events) in transgender men, despite some negative changes in metabolic risk factors.

Trans men on testosterone therapy should have their metabolic health (lipids, blood pressure) monitored regularly. However, current studies do not show an increased risk of actual cardiovascular events like heart attacks or strokes, though long-term data is still being gathered.

Combined oral administration of Scutellariae Radix and Coptidis Rhizoma extracts improves glucose and lipid metabolism in Type 2 Diabetes Mellitus (T2DM) models by downregulating the MAPK inflammatory pathway and upregulating the PI3K/Akt insulin signaling pathway.

This research suggests that a specific combination of Scutellariae Radix and Coptidis Rhizoma extracts may help regulate blood sugar and lipids in T2DM by reducing inflammation and improving insulin signaling. However, this is an animal study; human dosing, safety, and efficacy are not established here. Do not self-medicate with these herbs based on this paper alone.

Saturated fatty acids (e.g., palmitate) induce skeletal muscle atrophy and insulin resistance by promoting the accumulation of toxic lipid intermediates like ceramide and diacylglycerol (DAG), which inhibit insulin signaling and activate catabolic pathways.

If you are concerned about muscle loss, especially with age or obesity, reducing saturated fat intake (like palmitate) may help preserve muscle mass by improving insulin sensitivity and reducing inflammatory lipid intermediates. Prioritize unsaturated fats which appear to protect against muscle wasting.

Resveratrol protects human endothelial cells from oxidative stress-induced senescence by activating SirT1 expression and activity.

To potentially protect your blood vessel lining from age-related damage, focus on sources of Resveratrol like red grapes or supplements, as it appears to activate SirT1, a protein that helps cells resist stress and aging. The study suggests a specific activation threshold, implying that adequate dosing is critical for this benefit.

The addition of medroxyprogesterone acetate (MPA) to estrogen therapy may abrogate the cardiovascular protective effects of estrogen, potentially explaining the negative results in combined HRT trials like HERS and WHI.

For women requiring uterine protection, the choice of progestin matters. MPA, commonly used in HRT, may negate the heart-healthy lipid changes caused by estrogen. Women concerned about cardiovascular risk should discuss whether alternative progestins or estrogen-only therapy (if no uterus) are appropriate options.

Administration of ursodeoxycholic acid (UDCA) attenuates high-fat diet-induced obesity in mice by increasing hepatic levels of non-12-hydroxylated bile acids (non-12-OH BAs), which enhances GLP-1 secretion and upregulates UCP1 and PGC1a in brown adipose tissue.

This research suggests that ursodeoxycholic acid (UDCA) may help prevent obesity in the context of a high-fat diet by boosting beneficial bile acids (non-12-OH BAs). These bile acids signal the body to burn more energy (via UCP1 in fat tissue) and release satiety hormones (GLP-1). While this is a promising therapeutic avenue, it is currently based on animal models. For humans, maintaining a healthy weight through diet and exercise remains the primary strategy, but this mechanism highlights why bile acid health is important for metabolic function.

Aging causes preadipocytes to lose the capacity for proliferation and differentiation, leading to impaired lipid storage, increased susceptibility to lipotoxicity, and fat redistribution from subcutaneous to visceral/ectopic depots.

As you age, your body's ability to store fat safely in subcutaneous tissue declines, pushing it into dangerous visceral and organ areas. This is driven by cellular changes in fat progenitors, not just calories. Understanding this highlights the importance of maintaining metabolic health and potentially targeting inflammation, rather than just focusing on weight loss.

Saturated fatty acids (specifically palmitate) induce lipotoxicity and inflammation in preadipocytes, creating a self-perpetuating cycle of cellular stress and metabolic dysfunction.

The type of fat you eat matters. Saturated fats can trigger inflammation and stress in fat cells, especially as you age. Choosing unsaturated fats may help protect fat cell function and reduce inflammation.

Fat depot origin (subcutaneous vs. visceral/omental) determines inherent differences in preadipocyte function, with subcutaneous preadipocytes generally having a higher capacity for differentiation and lipid accumulation than omental preadipocytes.

Where fat is stored matters. Subcutaneous fat (under the skin) tends to be healthier and more functional than visceral fat (around organs), which is more prone to dysfunction and inflammation, especially with age.

Exogenous propionic acid reduces obesity-associated inflammation in human visceral adipose tissue by down-regulating pro-inflammatory cytokines (TNF-α, CCL5) and macrophage markers, while simultaneously up-regulating genes for glucose and lipid metabolism (GLUT4, LPL).

Consuming dietary fibers that ferment into propionic acid (found in whole grains, legumes, and resistant starch) may help reduce chronic low-grade inflammation in fat tissue and improve how your body handles glucose and fats. This happens because the byproducts of fiber digestion interact directly with fat cells and immune cells within the fat tissue.

Trans-resveratrol stimulates glucose uptake in skeletal muscle cells by activating AMP-activated protein kinase (AMPK), independent of the PI-3 kinase/Akt pathway.

This research suggests that resveratrol may help muscle cells take up more sugar by activating an energy-sensing enzyme (AMPK). While this is promising for metabolic health, it is based on cell studies, not human trials. Do not rely on this as a substitute for proven diabetes treatments.