Browse the evidence

Dietary resistant starch (RS) improves insulin sensitivity and reduces plasma insulin levels independently of the gut microbiota, likely through modulation of bile acid profiles and reduction of adipose tissue macrophage infiltration.

If you are trying to improve insulin sensitivity, adding resistant starch (like cooled potatoes, green bananas, or specific supplements like Hi-Maize) to your diet can help, even if you haven't focused on probiotics or prebiotics for your gut bacteria. The study used a 10% replacement of starch with RS in a high-fat diet context. For humans, this translates to incorporating RS-rich foods into meals, particularly those high in refined carbs or fats, to potentially lower fasting insulin levels through direct metabolic pathways involving bile acids and reduced inflammation in fat tissue.

Gut microbiota dysbiosis, characterized by decreased diversity and increased Proteobacteria, contributes to the pathogenesis of NAFLD by disrupting intestinal permeability and promoting hepatic inflammation via the gut-liver axis.

Focus on gut health as part of liver health. A diet high in fiber and low in processed additives may support a healthy microbiome, potentially reducing the risk of NAFLD progression. Probiotics and prebiotics are mentioned as potential therapeutic strategies.

Choline metabolism by gut bacteria into Trimethylamine (TMA) and subsequently Trimethylamine-N-oxide (TMAO) contributes to NAFLD by decreasing VLDL export and promoting insulin resistance.

Be cautious with high-dose choline supplements if you have NAFLD. Your gut bacteria may convert it to TMAO, which is linked to liver steatosis and insulin resistance.

Disruption of cardiolipin synthesis in thermogenic fat leads to insulin resistance and reduced metabolic flexibility through a mechanism involving ER stress factor CHOP-10.

This finding highlights that brown fat health is not just about burning calories but also about signaling. Disrupting this signaling (via lack of cardiolipin) can lead to insulin resistance. This suggests that preserving brown fat function through lifestyle factors like cold exposure might help maintain insulin sensitivity.

In patients with insomnia disorder, hyperconnectivity within the anterior default mode network (DMN) and increased connectivity between the salience network (SN) and the anterior DMN underlie affective symptoms and hyperarousal.

For insomnia patients, this research suggests that the problem is not just 'trying to sleep' but involves specific brain networks (DMN and Salience Network) that are hyperactive and failing to deactivate. This supports interventions like Cognitive Behavioral Therapy for Insomnia (CBT-I) which aim to reduce this cognitive and emotional hyperarousal, rather than just focusing on sleep environment or supplements.

In patients with Obstructive Sleep Apnea (OSA), cognitive and depressive symptoms are linked to dysfunctional connectivity within the posterior default mode network (DMN) and its disconnection from the frontoparietal network.

For OSA patients, cognitive issues like memory loss or brain fog are not just because they are tired; they are linked to changes in the brain's 'default mode network'. This highlights the importance of consistent OSA treatment (like CPAP) to potentially reverse or mitigate these network disruptions, and suggests that cognitive symptoms may persist even if daytime sleepiness is managed.

Past exposure to violence victimization (adolescent or childhood) exacerbates the negative association between loneliness and sleep quality.

If you have a history of violence or maltreatment, loneliness may hit your sleep harder than it does for others. This is likely due to heightened threat sensitivity. Interventions should address both the social connection and the trauma history, as treating one without the other may be less effective.

Shorter blood telomere length (BTL) is associated with increased all-cause mortality risk in middle-aged individuals, whereas this association is absent or reversed in ultra-elderly populations (75+ years).

Blood telomere length (BTL) measurement can serve as a biomarker for mortality risk, but its interpretation is strictly age-dependent. For middle-aged adults (45-64), shorter telomeres correlate with higher mortality risk. However, for those over 75, this correlation disappears or reverses, likely due to survivor effects and biological changes in aging. Therefore, BTL should not be used as a standalone universal predictor of longevity without considering the patient's age cohort.

Insulin resistance is the central pathogenic mechanism linking Metabolic Syndrome and NAFLD, driven by visceral adipose tissue expansion and the resulting release of free fatty acids and adipokines.

Fatty liver is not just about fat in the liver; it is a symptom of insulin resistance caused by visceral fat. Treating the underlying insulin resistance through weight loss and exercise is more effective than targeting liver fat alone.

Higher scores on five distinct dietary indices (Nutrition Index, E-DII, HEI-2015, MDS, DASH) are significantly associated with increased risk of frailty and higher 8-year mortality risk in adults across all ages.

Adhere to established healthy dietary patterns such as the Mediterranean, DASH, or HEI-2015 guidelines. These patterns, which emphasize fruits, vegetables, whole grains, and healthy fats while limiting processed foods and added sugars, are associated with a lower risk of frailty and mortality. You do not need to track every nutrient; focusing on the overall quality of your diet is sufficient to gain these benefits.

Current medical education in the United States fails to provide adequate nutrition training, with most medical schools providing less than the recommended 25 hours of instruction and residency programs largely lacking formal nutrition curricula.

Physicians need structured, integrated nutrition training throughout medical school and residency, not just a single course, to feel confident and competent in counseling patients.

Acute resistance exercise and endurance exercise produce distinct, mode-specific plasma metabolomic signatures, with resistance exercise preferentially increasing nucleotide breakdown products and lactate, while endurance exercise preferentially increasing lipid metabolites and ketone bodies.

To maximize specific health benefits, choose your exercise mode intentionally. If you want to improve fat oxidation and ketone production, prioritize endurance exercise. If your goal is to enhance glycolytic capacity and nucleotide turnover (often linked to strength and power), prioritize resistance exercise. Doing both covers a broader metabolic spectrum.

Endurance exercise significantly increases circulating beta-hydroxybutyrate (BHBA), which acts as a signaling molecule that inhibits histone deacetylases (HDACs) and activates the HCA2 receptor, promoting anti-inflammatory and neuroprotective effects.

Endurance exercise naturally boosts BHBA, which helps protect your brain and reduce inflammation. You don't need to force a ketogenic diet to get these benefits; regular aerobic activity is sufficient to trigger this protective signaling pathway.

Systematic screening for NAFLD is not recommended by the AASLD even in high-risk populations due to lack of effective drug treatments, cost-effectiveness concerns, and unclear long-term benefits.

In the US, you likely won't be systematically screened for NAFLD even if you have diabetes, because there are no approved drugs for it yet. Focus on managing your metabolic health instead.

Monthly high-dose vitamin D3 supplementation (200,000 IU initial bolus followed by 100,000 IU monthly) without calcium does not reduce the incidence of invasive or in situ cancer in adults aged 50-84.

Taking 100,000 IU of vitamin D3 once a month (after an initial 200,000 IU dose) does not appear to lower your risk of developing cancer. If you are taking vitamin D for cancer prevention, this specific high-dose monthly regimen is not supported by this evidence. You might discuss daily or weekly lower-dose strategies with your doctor, as this study suggests those methods warrant further investigation.

Inulin supplementation increases the abundance of Bifidobacterium, but this increase is a signature of intake rather than a direct driver of the observed metabolic improvements.

Don't assume that just because inulin boosts Bifidobacterium, that this specific bacteria is responsible for your health benefits. The actual metabolic improvements are linked to other changes in your gut bacteria, such as a decrease in Desulfovibrio and Clostridium sensu stricto.

Excessive consumption of certain seaweeds, particularly those high in iodine or accumulating toxic metals like arsenic, cadmium, or lead, poses potential health risks and requires adherence to safety regulations regarding toxic element limits.

Be mindful of the source and type of seaweed you consume. Some seaweeds, especially brown varieties like Kombu, are extremely high in iodine, which can be harmful in excess. Others may accumulate toxic metals like arsenic or lead. To minimize risk, choose seaweeds from regulated aquaculture sources and vary your intake to avoid excessive exposure to any single mineral or toxin.

Consumer acceptance of alternative proteins is significantly hindered by sensory challenges, including inferior taste, texture, and off-flavors, which are difficult to replicate compared to animal meat.

If you are trying alternative proteins, manage your expectations regarding taste and texture. They may not perfectly replicate meat. Experiment with different brands and recipes to find ones you enjoy.

Elevated circulating levels of branched-chain amino acids (BCAAs) and fatty acids (FAs) induce insulin resistance and metabolic dysfunction by promoting mitochondrial dysfunction and activating pro-inflammatory signaling pathways (NF-κB and NLRP3).

High levels of BCAAs and fatty acids in your blood are linked to insulin resistance and inflammation, which drive metabolic diseases. This often happens when your body struggles to process these nutrients (common in obesity or T2D) rather than just from eating them. Focus on improving metabolic flexibility and insulin sensitivity through exercise and balanced nutrition rather than assuming high BCAA/Fat intake is always beneficial.

Bariatric surgery is the most effective treatment for both obesity and T2DM, offering benefits beyond weight loss by recovering islet function and normalizing gut hormones.

For severe obesity and T2DM, bariatric surgery is currently the most effective treatment, working by restoring gut hormones (GLP-1, PYY) and beta-cell function, not just by reducing stomach size. It should be considered when lifestyle changes fail, despite surgical risks.

Shifting global production to match the Harvard Healthy Eating Plate (HHEP) recommendations would save 51 million hectares of arable land compared to current production levels.

Producing food according to nutritional guidelines (more fruits/veg, less grain/sugar) is more land-efficient than current practices. This shift saves 51 million hectares of arable land, preserving habitats and ecosystem services.

Adopting the HHEP diet increases total greenhouse gas (GHG) emissions by 49% compared to the current global diet, primarily due to increased animal-source protein consumption.

A diet that meets nutritional guidelines (HHEP) may increase GHG emissions if it relies on animal protein. To reduce emissions, combine healthy eating with plant-based proteins (legumes, seeds, nuts), which have a much lower GHG footprint.

A bimodal GLP-1/MK-801 conjugate produces synergistic weight loss and metabolic improvements in diet-induced obese rodents by targeting NMDA receptors in GLP-1-expressing brain regions, while mitigating the adverse behavioral and physiological effects of MK-801 monotherapy.

This research describes a new experimental drug that combines two mechanisms to treat obesity in animals. It works by targeting specific brain cells to reduce food intake and increase energy expenditure without the side effects of older drugs. This is not yet available for humans.

Hepatic overexpression of the enzyme ALOXE3 enhances whole-body insulin sensitivity and reduces weight gain by generating the PPARγ ligand 12-KETE.

This research identifies ALOXE3 as a key enzyme induced by fasting that improves insulin sensitivity by activating PPARγ. While direct supplementation with ALOXE3 is not currently available, the findings suggest that strategies inducing this enzyme, such as fasting or specific glucose transporter blockers (like trehalose), may offer metabolic benefits. Current clinical application is limited as genetic therapy is not yet optimized for polygenic diseases like obesity.