Browse the evidence

Acute or intermittent administration of the flavonoid fisetin acts as a senolytic to clear senescent cells, thereby reducing age-related pathology and extending both healthspan and lifespan in aged mice.

Fisetin is a potent senolytic that extends healthspan and lifespan in mice when administered intermittently at high doses (e.g., 100 mg/kg body weight for 5 days). While human trials are beginning, current evidence supports an intermittent 'hit-and-run' dosing strategy rather than daily supplementation to maximize efficacy and minimize potential side effects. Consult a physician before starting high-dose supplementation.

The SenMayo gene set (125 genes) accurately identifies senescent cells across tissues and species, and its expression levels significantly decrease following genetic or pharmacological clearance of senescent cells, serving as a reliable biomarker for senolytic efficacy.

SenMayo is a validated 125-gene signature that can detect senescent cells in various tissues (bone, brain, fat) and track their reduction after senolytic treatments (like Dasatinib + Quercetin). It is currently a research tool for monitoring senolytic efficacy, not a standard clinical test yet.

Obesity promotes aggressive breast cancer behavior (growth, invasion, metastasis) through a mechanism involving hypoxia-induced inflammation, increased aromatase expression, and stimulation of cancer stem cells.

Weight loss interventions aim to break the cycle of obesity-driven inflammation and estrogen production, thereby reducing the fuel for tumor growth and metastasis.

Obesity is associated with an increased risk of triple-negative breast cancer (TNBC) in premenopausal women, whereas this association is null or inverse in postmenopausal women.

For premenopausal women, obesity specifically increases the risk of the more aggressive triple-negative breast cancer subtype. Weight management is particularly crucial in this demographic.

Metabolic syndrome prevalence in US adults increased significantly from 1988 to 2012, reaching over 34% by 2012, driven by rising obesity, age, and low socioeconomic status.

Your risk of metabolic syndrome is not fixed. The data shows it has been rising for everyone, but it is strongly linked to obesity, age, and income. Focus on maintaining a healthy weight and accessing healthcare early, especially if you are in a lower socioeconomic bracket, to mitigate these risks.

Non-Hispanic black men have a lower likelihood of metabolic syndrome compared to non-Hispanic white men, while non-Hispanic black women have a higher likelihood compared to non-Hispanic white women.

If you are a Black man, your risk is statistically lower than White men, but still significant. If you are a Black woman, your risk is higher than White women. Regardless of race, managing weight and socioeconomic factors (like access to care and healthy food) are critical levers for reducing your personal risk.

Low education level and advanced age are independently associated with an increased likelihood of metabolic syndrome, regardless of obesity status.

If you have less education or are older, your risk is higher. This isn't just about willpower; it's about access. Focus on finding affordable, healthy food options and safe places to be active. Community-level changes, like better access to healthcare and fresh food, are crucial for mitigating these risks.

Endogenous oestrogens protect premenopausal women from type 2 diabetes by promoting subcutaneous fat storage, enhancing insulin sensitivity, and preserving beta-cell function, whereas the loss of oestrogen during menopause eliminates this protection and increases diabetes risk.

For women, maintaining metabolic health is heavily influenced by oestrogen levels. Before menopause, your body naturally stores fat in a safer (subcutaneous) way and stays more insulin-sensitive than men. After menopause, this protection fades, increasing diabetes risk. To counter this, focus on preserving muscle mass and managing visceral fat through exercise and diet, as these become more critical once oestrogen levels drop. Discuss hormone therapy options with your doctor if you are at high risk.

Oestrogen receptor alpha (ERα) activation mediates the protective effects of oestrogens on metabolic health by promoting insulin synthesis, beta-cell survival, and energy expenditure through brown adipose tissue beiging.

The protective benefits of oestrogen in women are largely driven by its interaction with specific receptors (ERα) in key metabolic organs. This interaction helps protect the pancreas, improves how muscles use insulin, and boosts energy burning in fat tissue. This highlights why maintaining hormonal balance is crucial for metabolic health.

High BMI acts as a protective factor against breast cancer in females aged 20 to under 50 years, a phenomenon potentially explained by the 'obesity paradox'.

While high BMI is generally harmful, this specific protective effect on breast cancer in younger women is complex and may be due to hormonal factors or methodological issues. It does not justify maintaining a high BMI, as the overall burden of disease from high BMI is substantial.

Age-related decline in skeletal muscle performance is driven by multifactorial mechanisms beyond sarcopenia, including excitation-contraction uncoupling, motor unit remodeling, and neural factors, which collectively reduce muscle quality and physical function.

To maintain physical function as you age, focus on more than just building muscle mass. Incorporate exercises that challenge coordination and balance, and consider the importance of neural health. A holistic approach addressing muscle, nerve, and bone health is key to preventing disability.

Excitation-contraction (E-C) uncoupling, specifically involving reduced SR Ca2+ release and reuptake, contributes significantly to the reduction in muscle quality and force production in aging skeletal muscle.

Understanding the cellular mechanisms of aging muscles can help in developing targeted therapies, such as drugs that improve calcium handling, to maintain muscle strength.

Neural factors, including motor unit remodeling, reduced voluntary activation, and cortical changes, significantly contribute to muscle weakness and reduced performance in the elderly, independent of muscle mass loss.

Resistance training may not only build muscle but also improve neural drive and motor unit recruitment, helping to maintain strength and function in older age.

Pharmacological stimulation of GLP-1 receptors significantly reduces plasma glucose and improves glycaemic control in subjects with type 2 diabetes by preserving insulinotropic and glucagonostatic effects.

For individuals with type 2 diabetes, GLP-1 receptor agonists are a highly effective treatment option. They work by mimicking the natural hormone GLP-1 to lower blood sugar levels. This class of medication is a cornerstone of modern diabetes management due to its ability to improve glycaemic control.

Dietary fiber supplementation leads to small, clinically minor reductions in body weight and body fat percentage, and is not a realistic standalone solution for effective weight reduction.

Do not rely on fiber supplements for significant weight loss. While fiber can help with satiety and minor weight management, its primary value lies in metabolic health, gut health, and cardiovascular protection. Use fiber as part of a broader healthy diet rather than a standalone weight loss strategy.

High levels of physical activity are associated with a 27% increased risk of melanoma, likely due to increased outdoor sun exposure rather than the activity itself.

If you exercise outdoors, prioritize sun safety. Use sunscreen, wear protective clothing, and seek shade when possible to mitigate the increased risk of melanoma associated with outdoor physical activity.

High dietary cholesterol drives the sequential progression of non-alcoholic fatty liver disease (NAFLD) to hepatocellular carcinoma (HCC) by inducing gut microbiota dysbiosis and altering metabolites, specifically increasing taurocholic acid and decreasing 3-indolepropionic acid.

If you have fatty liver or high cholesterol, reducing dietary cholesterol (found in egg yolks, organ meats, and shellfish) may be critical to preventing liver cancer, not just for heart health. The key is that cholesterol changes your gut bacteria to produce toxic liver metabolites. Lowering cholesterol intake can reverse these bacterial changes and stop liver damage.

Cholesterol-lowering therapy with atorvastatin completely prevents NAFLD-HCC development in high-cholesterol diet-fed mice by restoring gut microbiota dysbiosis.

For patients with fatty liver and high cholesterol, statin therapy may offer protection against liver cancer by normalizing gut bacteria. This suggests that managing cholesterol with statins might have benefits beyond cardiovascular health for liver cancer prevention.

The AGEs/RAGE axis contributes to pancreatic beta cell toxicity and apoptosis via oxidative stress and islet amyloid polypeptide (IAPP) aggregation.

Preserving beta cell function is crucial; strategies that reduce AGEs and oxidative stress may help protect pancreatic beta cells.

Quercetin glucosides from onions have higher bioavailability and absorption rates than quercetin aglycones or rutinosides (from tea/apples) due to active transport mechanisms.

If you are seeking quercetin for health benefits, onions may be a more efficient source than tea or apples because your body absorbs the quercetin from onions better. The chemical form attached to sugar in onions allows for active absorption.

Dietary palmitic acid intake does not significantly increase tissue palmitic acid levels because endogenous de novo lipogenesis (DNL) compensates by reducing synthesis, maintaining homeostasis under normal conditions.

If you are metabolically healthy, eating palmitic acid (found in palm oil, meat, dairy) does not automatically raise your body's palmitic acid levels. Your body compensates by making less internally. However, this balance breaks down if you have obesity, insulin resistance, or eat too many sugars, which force your body to overproduce fat.

Consumption of theabrownin, a pigment in Pu-erh tea, lowers serum and hepatic cholesterol and triglycerides by suppressing bile salt hydrolase (BSH) activity in gut microbiota, which increases ileal conjugated bile acids and inhibits the intestinal FXR-FGF15 signaling pathway, thereby stimulating hepatic bile acid synthesis and excretion.

Drinking Pu-erh tea (specifically the fermented variety rich in theabrownin) can help lower cholesterol and triglycerides. This works not by suppressing appetite, but by changing gut bacteria to reduce bile acid breakdown, which signals the liver to burn more cholesterol. A typical effective dose in the study was roughly 300ml of strong Pu-erh tea twice daily for humans, or equivalent purified theabrownin supplementation.

Classification of dietary fiber by water solubility is an unreliable predictor of physiological effects, as solubility does not directly correlate with fermentability or short-chain fatty acid (SCFA) profiles.

Do not choose foods based on whether they are 'soluble' or 'insoluble' fiber. This classification is scientifically flawed for predicting health benefits. Instead, eat a variety of fiber-rich whole foods (vegetables, fruits, whole grains, legumes) to ensure you get a mix of physiological effects.

High-molecular-weight polysaccharides (>300 kDa) from Hirsutella sinensis mycelium reduce diet-induced obesity and metabolic disorders in mice by selectively enriching the gut bacterium Parabacteroides goldsteinii.

This research suggests that consuming high-molecular-weight polysaccharides from Hirsutella sinensis (a medicinal fungus) may help manage weight and metabolic health by feeding beneficial gut bacteria, specifically Parabacteroides goldsteinii. In mice, this led to a 50% reduction in weight gain on a high-fat diet. While promising, this is an animal study. For humans, this implies that prebiotic fibers that support specific gut bacteria might be beneficial for metabolic health, but direct supplementation with this specific fungal fraction is not yet a standard human treatment.