Browse the evidence

For women, higher density of small grocery stores and closer proximity to chain supermarkets are associated with higher BMI, contradicting the assumption that supermarket proximity reduces obesity.

For women, living near small grocery stores or supermarkets might actually increase obesity risk due to exposure to processed foods. Focus on nutrition knowledge and making conscious choices, but recognize that environmental factors play a significant role.

CPAP treatment for OSA in diabetic patients improves daytime sleepiness and cognitive function, though its direct impact on glycaemic control (HbA1c) remains unproven in adequately controlled studies.

If you have OSA and diabetes, CPAP is the standard treatment to fix sleepiness and protect your heart. However, do not expect it to magically fix your blood sugar levels without other diabetes management strategies, as evidence for that specific benefit is still lacking.

In patients with diabetes, increased egg consumption is associated with a higher risk of coronary heart disease.

If you have diabetes, be cautious with egg consumption. This study found that higher intake was linked to a 54% increased risk of heart disease in diabetics. Consult your healthcare provider to determine a safe limit for your specific health profile.

High-frequency cell phone use is negatively associated with cardiorespiratory fitness (VO2 peak) in college students, independent of sex, body fat percentage, and self-efficacy.

If you use your phone heavily (texting, gaming, social media) for several hours a day, you may have lower cardiorespiratory fitness than light users, even if you exercise. This is likely because heavy phone use displaces time that could be spent on physical activity or promotes sedentary habits like gaming. To maintain fitness, be mindful of 'sedentary phone time' and ensure it doesn't replace your active leisure or exercise routines.

In nonobese adults, non-alcoholic fatty liver disease (NAFLD) is associated with intestinal dysbiosis characterized by decreased microbial diversity, reduced Firmicutes (specifically SCFA-producing Lachnospiraceae and Ruminococcaceae), and increased Gram-negative bacteria, which correlates with elevated liver enzymes and metabolic markers.

If you are nonobese but have been diagnosed with fatty liver, your gut health likely plays a significant role. This condition is linked to a specific imbalance in gut bacteria (less Firmicutes, more Gram-negative bacteria) that correlates with liver stress. While this study is observational, it suggests that maintaining gut health through a diverse, fiber-rich diet (to support SCFA-producing bacteria) may be a relevant consideration for managing nonobese NAFLD, alongside standard medical care.

Interrupting sedentary behavior does not significantly improve lipidemia (blood fats) in adults.

Breaking up sitting time will not lower your cholesterol or triglycerides. Focus on other strategies for lipid management.

Chronic treatment with the beta-3 adrenergic receptor agonist mirabegron increases brown adipose tissue (BAT) metabolic activity and volume in healthy women without altering body weight.

This study suggests that the bladder medication Mirabegron, when taken chronically at a dose higher than standard (100mg vs 50mg), can activate brown fat and increase its volume in healthy women without causing weight gain. However, because the study was small, open-label, and lacked a placebo, these results should be viewed as preliminary evidence that beta-3 stimulation is a viable pathway for metabolic health, pending larger controlled trials.

Chronic mirabegron treatment improves insulin sensitivity, glucose effectiveness, and pancreatic beta-cell function in healthy women.

Mirabegron, taken at 100mg daily for 4 weeks, significantly improved insulin sensitivity and glucose handling in healthy women. This suggests beta-3 stimulation is a potent lever for metabolic health, though the high dose used here caused mild cardiovascular side effects, suggesting future drugs need better selectivity.

Chronic mirabegron treatment increases plasma levels of HDL cholesterol, ApoA1, and bile acids, independent of weight loss.

Mirabegron treatment improved favorable lipid markers (HDL, ApoA1) and bile acids. This may be a downstream effect of increased brown fat activity consuming lipoproteins. This benefit occurred without weight loss.

Age-related physiological changes in the gastrointestinal tract, including reduced immune function and dietary shifts, lead to a restructuring of the gut microbiota (dysbiosis) characterized by a decrease in beneficial bacteria (e.g., Faecalibacterium prausnitzii, Clostridium cluster XIVa) and an increase in facultative anaerobes (pathobionts), which is associated with frailty and inflammation.

As you age, your gut bacteria naturally shift, often losing beneficial types and gaining inflammatory ones. This isn't just bad luck; it's linked to how you eat and your immune health. To counter this, focus on high-fiber diets (fruits, vegetables, whole grains) and consider probiotics/prebiotics specifically designed for older adults, as these can help maintain a healthier microbial balance and reduce inflammation.

Sodium (Na+) and Potassium (K+) levels in iontophoretic sweat are positively correlated within individuals, but across a population, individuals with higher sodium levels tend to have lower potassium levels.

If you are monitoring electrolytes, be aware that your body's balance of sodium and potassium in sweat is individual. High sodium excretion might correlate with lower potassium excretion for you specifically, but this pattern may not hold true when comparing you to others.

Psychosocial factors, including socioeconomic status, perceived control, and depression, are key determinants of cardiovascular disease and mortality.

Pay attention to your mental well-being and social connections. Managing stress, maintaining a sense of control, and seeking social support are important for cardiovascular health, especially in high-stress environments.

High levels of sedentary behavior, specifically television viewing time, are associated with a significantly increased risk of lung cancer compared to low levels of sedentary time.

If you spend a lot of time sitting, especially watching TV, be aware that this habit is linked to a higher risk of lung cancer. This risk may be partly due to smoking, which is more common among sedentary individuals, but the sitting itself may also play a role. Try to limit continuous viewing time and take breaks to stand or move.

Stimulating mitophagy (the removal of damaged mitochondria) using compounds like spermidine or urolithin A can prevent age-related pathologies and extend lifespan in model organisms.

Dietary sources of spermidine (e.g., wheat germ, cheese) and urolithin A precursors (pomegranate) may support mitochondrial quality control. However, do not expect these to replace exercise or guarantee lifespan extension in humans based on current evidence.

Gut microbiota dysbiosis in women with Polycystic Ovary Syndrome (PCOS) is significantly associated with clinical phenotypes, including elevated testosterone, increased waist circumference, and altered brain-gut peptides (serotonin, ghrelin, PYY).

This research suggests that the gut health of women with PCOS differs from controls, specifically showing lower levels of beneficial bacteria (like Akkermansia) and higher levels of potentially inflammatory bacteria (like Escherichia/Shigella). These microbial differences are linked to higher testosterone and waist circumference. While this study does not prescribe a specific diet, it supports the investigation of dietary interventions aimed at improving gut microbiota diversity as a potential strategy to manage PCOS symptoms.

Increasing dietary fiber intake (4-19 g/day via supplements or whole foods) leads to little to no significant improvement in A1C or CVD risk markers in people with type 2 diabetes, although it may improve postprandial glycemia and inflammatory markers.

Adding fiber supplements (4-19g/day) or eating a high-fiber diet may help with post-meal blood sugar spikes, but it is unlikely to significantly lower your A1C or improve cholesterol levels on its own. Focus on a balanced diet with whole foods rather than relying on supplements for major metabolic improvements.

Magnesium deficiency is mechanistically linked to cellular calcium activation, which drives inflammation, metabolic syndrome, and vascular calcification via TRPM channels.

Maintaining adequate magnesium intake helps regulate calcium at the cellular level, potentially reducing inflammation and vascular stiffness. This is achieved through a balanced diet rich in magnesium.

High-fructose diets promote visceral adipose tissue accumulation and insulin resistance, which indirectly drives intrahepatic lipid accumulation by increasing the flux of free fatty acids from adipose tissue to the liver.

Fructose may contribute to belly fat (visceral adiposity) more than glucose in some studies. This belly fat releases fatty acids into the liver, worsening fatty liver. This is an indirect effect. Managing overall weight and insulin sensitivity is key to reducing this flux.

Alpha-hydroxybutyrate (a-HB) inhibits glucose-induced insulin release, while linoleoyl-glycerophosphocholine (L-GPC) stimulates it, providing a physiological mechanism for their predictive value regarding beta-cell dysfunction.

This paper explains why these markers matter: a-HB directly suppresses insulin secretion, while L-GPC enhances it. This suggests that high a-HB and low L-GPC are not just passive signs of disease but actively contribute to beta-cell failure. However, this was shown in rat cells, so human application is theoretical.

Selenium status above 120 μg/L is associated with an elevated risk of type 2 diabetes and certain cancers.

Do not assume more selenium is always better. Levels above 120 μg/L in the blood are linked to higher risks of type 2 diabetes and some cancers. Avoid high-dose supplementation unless medically indicated and monitored.

Gamma-linolenic acid (GLA) improves the efficacy and reduces the side effects of tamoxifen in breast cancer patients, including improving transcutaneous absorption.

If you are taking tamoxifen for breast cancer, ask your oncologist about adding GLA. Research suggests it may help the drug work better, reduce side effects, and potentially speed up how quickly you respond to therapy. It may also help deliver the drug more effectively through the skin if using topical forms.

Gamma-linolenic acid (GLA) exhibits tumoricidal activity against various cancers (breast, pancreas, colon, brain) and inhibits metastasis by downregulating osteonectin and stimulating metastasis suppressor genes.

GLA shows promise in laboratory and some clinical settings for fighting cancer cells and preventing spread, particularly when combined with standard treatments. It may help reduce side effects of chemotherapy and improve drug efficacy. Consult your oncologist before use.

Circulating choline levels are positively associated with NAFLD severity in clinical patients, but this association is largely mediated by TMAO levels.

Choline is an essential nutrient found in eggs and meat. However, if you have NAFLD, high levels of choline might be converted by your gut bacteria into TMAO, which is linked to worse liver fat. It's not about eliminating choline, but being mindful of sources high in choline and carnitine (like red meat) and focusing on overall liver health.

High adherence to the Mediterranean diet does not significantly reduce the risk of prostate, pancreatic, esophageal, or blood cancers.

Do not rely on the Mediterranean diet to prevent prostate, pancreatic, esophageal, or blood cancers. While it offers protection against other cancers and mortality, these specific cancers may require different prevention strategies or screening protocols.