Browse the evidence

Physical exercise increases cerebrospinal fluid and plasma levels of Orexin-A, which may contribute to exercise-induced hippocampal neurogenesis and cognitive benefits.

Engage in regular physical exercise. Beyond physical fitness, this increases Orexin-A levels, which may support brain health, neurogenesis, and cognitive performance by crossing the blood-brain barrier.

Astragaloside IV (AS-IV), a saponin in Astragalus, reduces blood glucose and insulin resistance by modulating intestinal microbiota to increase butyric acid and activating PI3K/AKT and AMPK/SIRT1 signaling pathways.

Astragaloside IV (AS-IV), a key compound in Astragalus, may help lower blood sugar and improve insulin sensitivity. It works by changing gut bacteria to produce more butyric acid and by activating specific cellular pathways that help cells use insulin better. This suggests Astragalus may be beneficial for managing T2DM.

GLP-1 receptor agonists (exendin-4 and liraglutide) improve memory deficits, reduce amyloid plaque load, and restore insulin signaling in Alzheimer's disease models.

GLP-1 drugs like liraglutide and exendin-4 show promise in animal studies for protecting the brain and improving memory in Alzheimer's. They work by activating pathways similar to insulin. While human trials are ongoing, these drugs might be a future treatment option for AD, especially if you have diabetes.

Daily oral administration of live Dysosmobacter welbionis J115T (1.0×10^9 CFU) prevents diet-induced obesity, reduces fat mass gain, and improves glucose tolerance in mice fed a high-fat diet.

In a mouse model, daily consumption of live Dysosmobacter welbionis J115T at a dose of 1 billion colony-forming units prevented weight gain and improved metabolic health during a high-fat diet. This effect was specific to live bacteria, as pasteurized versions were ineffective. This suggests that maintaining bacterial viability is critical for this specific strain's metabolic benefits.

Obesity and Type 2 Diabetes Mellitus in the elderly drive cardiovascular disease through chronic systemic inflammation, oxidative stress, and insulin resistance, leading to cardiac remodeling and fibrosis.

Managing weight and blood sugar is critical for heart health in older age because excess fat and high blood sugar trigger chronic inflammation that damages the heart muscle. Focus on a balanced diet and regular activity to reduce these inflammatory markers, as they are direct drivers of heart failure and artery disease.

Beetroot juice supplementation does not reliably improve cardiorespiratory endurance in hypoxic conditions (high altitude), and results are controversial.

Do not rely on beetroot juice to guarantee performance improvements when training or competing at high altitudes. The evidence is mixed, and it may not provide the expected ergogenic benefit in hypoxic environments.

Traditional herbal medicines (THM) including silymarin, berberine, resveratrol, and curcumin show hepatoprotective effects in preclinical models and some clinical trials for NAFLD/NASH, but robust, large-scale randomized controlled trials confirming efficacy for progressive NASH are currently lacking.

While traditional herbal medicines like silymarin, berberine, resveratrol, and curcumin show promise in laboratory studies and some early clinical trials for fatty liver disease, they are not yet proven cures for advanced NASH. Patients should not rely on them as a substitute for standard medical care or lifestyle changes without consulting a doctor, as evidence for their effectiveness in humans is still mixed and large-scale trials are ongoing.

Elevated levels of pro-inflammatory adipokines (e.g., leptin, resistin, chemerin, FABP4) and reduced levels of anti-inflammatory adipokines (e.g., adiponectin) drive chronic low-grade inflammation in adipose tissue during obesity, contributing to insulin resistance and metabolic disorders.

Obesity involves complex hormonal signaling from fat tissue that promotes inflammation and insulin resistance. While this review focuses on mechanisms rather than direct lifestyle advice, it underscores that metabolic health is influenced by the biochemical environment of fat tissue, not just energy balance. Targeting these inflammatory pathways (e.g., through weight loss or specific medical interventions) may help mitigate metabolic risks.

Leptin acts as a pro-inflammatory cytokine in adipose tissue by promoting macrophage infiltration and activation via JAK/STAT, MAPK, and PI3K pathways, contributing to local inflammation and lipid accumulation.

High levels of leptin in obesity do more than affect hunger; they actively promote inflammation in fat tissue by attracting and activating immune cells (macrophages). This inflammatory state contributes to insulin resistance and other metabolic issues.

Resistin promotes inflammation and insulin resistance by binding to TLR4 and activating NF-kB, JNK, and p38 MAPK pathways in macrophages and hypothalamic cells.

Resistin, a protein elevated in obesity, contributes to inflammation and insulin resistance by activating specific immune pathways (TLR4/NF-kB). This highlights the complex interplay between fat tissue, immune cells, and metabolic health.

Cold exposure activates the beta-3 adrenergic receptor system, leading to UCP1 upregulation and non-shivering thermogenesis, although human response varies significantly compared to rodents.

Cold exposure can activate brown fat via the beta-3 adrenergic system, but human response is highly variable and often weaker than in mice. While you can try cold showers or lower temperatures, do not rely on it as a primary weight loss strategy. Diet and exercise are more reliable and practical methods to increase metabolic rate.

The link between shift work and cancer (particularly breast, prostate, and colorectal) is less consistent and potentially confounded by lifestyle factors, with evidence suggesting a dose-response relationship with duration of exposure, especially for women.

For long-term shift workers, especially women, be aware of the potential increased cancer risk associated with night work. Mitigate this by minimizing light exposure during night shifts (use dim lights, blue-light blocking glasses) and maximizing darkness during daytime sleep. Regular health screenings are crucial.

Chronic activation of mTORC1 signaling in aging skeletal muscle leads to mitochondrial dysfunction, oxidative stress, and muscle senescence, resulting in sarcopenia rather than hypertrophy.

While stimulating muscle growth pathways like mTOR is essential for building muscle, doing so chronically without adequate recovery or in older age can backfire, leading to muscle loss and cellular aging. Focus on balanced training and nutrition that supports both synthesis and cellular cleanup (autophagy) rather than constant, maximal stimulation.

FGF21 analogs reduce hepatic steatosis and lipotoxicity in NASH by suppressing de novo lipogenesis and increasing mitochondrial fatty acid oxidation, independent of weight loss.

FGF21 analogs are emerging therapies that target the hormonal drivers of liver fat. They work by telling the liver to stop making new fat and burn existing fat, rather than just restricting calories. This addresses the root cause of NASH (steatosis) rather than just the scarring (fibrosis).

FGF21 analogs exert direct anti-inflammatory effects in NASH by suppressing pro-inflammatory cytokine expression (TNF-a, IL-6, IL-1b) and inhibiting immune cell infiltration into the liver.

FGF21 analogs help reduce liver inflammation by blocking the signals that recruit immune cells and produce damaging cytokines. This helps prevent the progression from fatty liver to scarring (fibrosis).

Endogenous FGF21 levels are elevated in NASH patients but are insufficient to ameliorate disease due to a 'FGF21-resistant state' caused by receptor downregulation and enzyme-mediated inactivation.

Your body naturally produces more FGF21 when you have fatty liver, but it doesn't work well enough to fix the problem. This is why specialized FGF21 analogs are being developed to bypass this resistance.

In elderly individuals, lower circulating levels of Insulin-like Growth Factor-1 (IGF-1) and Mechanical Growth Factor (MGF) are independently associated with reduced appendicular skeletal muscle mass (ASMI) and sarcopenia.

If you are over 60, your natural production of IGF-1 and MGF declines, which contributes to muscle loss. While you cannot easily change your age, you can support your hormonal health through adequate protein intake (at least 0.6 g/kg/day) and resistance training, which may help mitigate the decline in these growth factors.

Certain pharmaceutical drugs (ACE inhibitors, statins, mTOR inhibitors) and lifestyle interventions (exercise) can increase circulating Klotho levels, potentially offering therapeutic benefits for age-related diseases.

Regular physical activity and adherence to prescribed medications for blood pressure, cholesterol, or metabolic health may naturally support higher Klotho levels. This suggests that standard health maintenance practices contribute to longevity mechanisms.

Gender-affirming hormone therapy (GHT) with estrogen in transgender females (TGF) is associated with an increased risk of myocardial infarction and ischemic stroke compared to cisgender females, whereas testosterone therapy in transgender males (TGM) does not show consistent evidence of increased cardiovascular or cerebrovascular disease risk.

If you are a transgender woman taking estrogen, be aware that your risk of heart attack and stroke may be higher than that of cisgender women, so regular cardiovascular check-ups are important. If you are a transgender man taking testosterone, current evidence does not show a significantly increased risk of heart or brain vessel disease, though blood pressure and lipids should still be monitored.

Gender-affirming hormone therapy (GHT) is associated with alterations in blood pressure, with some studies showing increases in both transgender females and males, while others show decreases or no change depending on the formulation and duration of therapy.

Your blood pressure may change after starting hormones. It can go up or down depending on the type of hormone and how long you've been taking it. Regular monitoring is key to catching any changes early.

Gender-affirming hormone therapy (GHT) with estrogen in transgender females (TGF) is associated with an increased risk of venous thromboembolism (VTE), whereas no increased risk of VTE has been demonstrated in transgender males (TGM).

If you are a transgender woman taking estrogen, be aware that your risk of blood clots may be higher than that of cisgender women, especially with oral formulations. Transdermal estrogen may carry a lower risk. Discuss formulation options with your provider.

SIRT1 promotes lipid metabolism and mitochondrial biogenesis in adipocytes by regulating key enzymatic pathways including PPARα and SREBF1c.

SIRT1 activity is crucial for healthy fat cell function, promoting mitochondrial health and lipid metabolism. While boosting NAD+ precursors like NMN can support this pathway in cell models, human application requires understanding that SIRT1 is just one part of a complex metabolic system.

In Type 2 Diabetes patients, increased plasma Interleukin-6 (IL-6) levels are significantly correlated with the abundance of Gram-negative gut bacteria, specifically Prevotella copri and Bacteroides vulgatus, suggesting these microbes drive systemic inflammation and insulin resistance.

This research highlights that in Type 2 Diabetes, high levels of specific gut bacteria (Prevotella and Bacteroides) are linked to higher inflammation (IL-6) and insulin resistance. While this paper does not prescribe a treatment, it suggests that managing gut health through diet may be a relevant factor in addressing the inflammatory component of diabetes, alongside standard medical care.

Prolonged endoplasmic reticulum stress (ERS) activates the unfolded protein response (UPR), which mediates chronic low-grade inflammation, insulin resistance, and cardiac dysfunction in obesity.

This research highlights that obesity triggers cellular stress (ERS) in the heart, leading to inflammation and insulin resistance. While this paper does not prescribe a specific diet, it underscores the importance of reducing metabolic stressors (like excess calories and free fatty acids) to prevent this cellular damage. Focus on sustainable weight management and metabolic health to reduce the burden on your cardiovascular system.