Browse the evidence

GLP-1 agonists (semaglutide, liraglutide) reduce nephropathy incidence and improve microvascular function beyond epidemiological expectations, but may increase early retinopathy-related events due to rapid HbA1c reduction.

GLP-1 agonists like semaglutide and liraglutide offer significant protection against kidney disease (nephropathy) and improve microvascular function in diabetic patients with heart disease. However, because they lower blood sugar rapidly, they can temporarily increase the risk of eye problems (retinopathy) due to osmotic shifts. Patients with existing eye disease should be monitored closely when starting these medications.

Microvascular dysfunction, including rarefaction and endothelial dysfunction, contributes to cardiovascular risk in diabetes independently of macrovascular atherosclerosis, explaining symptoms like microvascular angina even with normal coronary arteries.

In diabetes, damage to the tiny blood vessels (microcirculation) can cause heart symptoms like angina and heart failure, even if the main coronary arteries are clear. This is due to reduced vessel density (rarefaction) and poor blood vessel function. Recognizing microvascular dysfunction is key to managing heart health in diabetes, as standard tests for blockages may miss this issue.

Oral administration of live Bacteroides vulgatus and Bacteroides dorei reduces gut microbial lipopolysaccharide (LPS) production, thereby attenuating endotoxemia and inhibiting atherosclerotic lesion formation.

For individuals with coronary artery disease, maintaining or restoring healthy levels of Bacteroides vulgatus and Bacteroides dorei may help reduce systemic inflammation and arterial plaque buildup. This is achieved by lowering gut-derived lipopolysaccharides (LPS) that trigger immune responses. While this study used direct bacterial gavage in mice, the findings suggest that dietary or probiotic strategies supporting these specific bacterial species could be a valuable adjunctive strategy for cardiovascular health, particularly by reducing endotoxemia.

Excessive ROS generation and depletion of antioxidants cause oxidative stress, which promotes endothelial dysfunction, leading to insulin resistance, hypertension, and dyslipidemia, thereby contributing to metabolic syndrome.

Focus on reducing the sources of oxidative stress: manage body weight, improve diet quality (e.g., Mediterranean diet, time-restricted eating), and increase physical activity. These interventions address the root causes (obesity, hyperglycemia) that drive excessive ROS production and subsequent metabolic dysfunction.

High density of unhealthy food outlets (food swamps) is a stronger predictor of adult obesity rates than lack of access to healthy food (food deserts), with the effect being significantly underestimated by standard observational methods.

To reduce obesity, local governments should prioritize zoning laws that restrict the density of fast food and junk food outlets, rather than just trying to bring in grocery stores. This is especially important in low-income areas with high inequality and limited transportation options.

Low levels of PGC-1α exacerbate inflammatory responses and oxidative stress by downregulating mitochondrial antioxidant genes and promoting NF-κB activation, creating a vicious cycle of metabolic dysfunction.

To reduce chronic inflammation and oxidative stress, prioritize activities that boost PGC-1α expression, such as regular exercise, cold exposure, and fasting. These natural stimuli upregulate PGC-1α, which in turn enhances mitochondrial antioxidant defenses and suppresses inflammatory pathways like NF-κB.

PGC-1α acts as a direct repressor of NF-κB transcriptional activity, specifically blocking the expression of proinflammatory cytokines like IL-6 and TNF-α.

Regular physical activity and metabolic health practices naturally increase PGC-1α, which physically binds to and inhibits NF-κB, thereby reducing the production of inflammatory cytokines like IL-6 and TNF-α.

Upregulation of PGC-1α enhances mitochondrial antioxidant defense by increasing the expression of genes such as MnSOD, catalase, and peroxiredoxin, thereby protecting cells from oxidative damage.

Engage in activities that boost PGC-1α, such as exercise and cold exposure, to naturally increase the expression of powerful mitochondrial antioxidants like MnSOD and catalase.

US obesity prevalence has not levelled off but continues to rise, with a temporary pause in men's rates between 2009-2012 followed by a resumption of increase.

Do not assume the obesity epidemic is over because headlines might suggest rates are stable. The data shows that while there was a brief pause in men's obesity rates around 2009-2012, the overall trend is still increasing, particularly for women. Effective, sustainable, and culturally-tailored interventions are still urgently needed to counteract these rising trends.

Obesity disparities are significant across race, ethnicity, and socioeconomic status, with Non-Hispanic Black and Mexican-American populations facing the highest prevalence and rates of increase.

Recognize that obesity risk is not evenly distributed. Non-Hispanic Black and Mexican-American populations face significantly higher prevalence and rates of increase. Interventions must be culturally tailored and address socioeconomic disparities to be effective.

Aging is associated with a progressive dampening of circadian rhythm amplitude and a phase advance in chronotype, leading to sleep fragmentation and increased susceptibility to metabolic and neurodegenerative diseases.

As you age, your internal clock shifts earlier and weakens, causing fragmented sleep. To support health, prioritize bright light exposure in the morning to reinforce the clock, maintain consistent meal times to support peripheral clocks, and recognize that sleep changes are not just inevitable decline but potential markers of health that can be managed.

In healthy young adults undergoing nutritional transition, a higher-fat diet (40% energy) compared to a lower-fat diet (20% energy) causes unfavorable shifts in gut microbiota (decreased Faecalibacterium/Blautia, increased Bacteroides/Alistipes), reduces short-chain fatty acids, and increases plasma proinflammatory markers.

If you are young and healthy but your diet is shifting towards higher fat intake, be aware that increasing fat to 40% of your calories (while keeping calories constant) may negatively impact your gut bacteria and increase inflammation markers like CRP. Switching to a lower fat diet (20% of calories) was associated with more favorable gut bacteria (higher Faecalibacterium and Blautia) and lower inflammation.

Combined exercise and nutritional supplementation does not provide a clinically significant additional benefit to muscle mass, strength, or physical performance compared to exercise alone in older adults.

If you are over 60, focus on resistance training. You do not need to buy expensive protein powders, creatine, or amino acid supplements to see improvements in muscle mass, strength, or physical performance. Exercise alone is sufficient for the vast majority of older adults.

Chronic hyperglycemia induces mitochondrial ROS production and ER stress, creating a vicious cycle that impairs pancreatic beta-cell function and insulin secretion, leading to Type 2 Diabetes.

To protect your beta-cells, focus on preventing chronic high blood sugar. The paper suggests that keeping glucose levels stable reduces the oxidative stress that damages the cells responsible for making insulin. This means prioritizing a diet that prevents glucose spikes and supports mitochondrial health.

Pharmacological elimination of senescent cells (senolytics) or suppression of their secretory phenotype (senomorphics) delays or alleviates multiple age-related pathologies and extends healthspan in animal models.

Current research suggests that clearing senescent cells may help delay age-related diseases. However, effective treatments are still in clinical trials. Do not attempt to self-medicate with unproven supplements claiming to be 'senolytics' without medical supervision, as efficacy and safety are not yet established for general use.

Current global supplies of EPA and DHA from traditional marine sources are insufficient to meet human nutritional requirements, creating a supply-demand gap of over 0.4 to 1 million tonnes annually.

You cannot rely on current global fish stocks alone to meet recommended Omega-3 intake levels for everyone. The system is already strained. Consumers should look for products fortified with novel, sustainable sources of EPA/DHA (like algae oils) to ensure adequate intake without contributing to overfishing.

Novel sources of EPA and DHA, such as genetically modified oilseed crops (canola/camelina) and microalgae, can fully replace fish oil in aquaculture feeds without negative impacts on fish growth or health.

Look for farmed fish fed with novel Omega-3 sources (algae or GM plant oils). These products often have higher or equal Omega-3 levels compared to standard farmed fish and support sustainable fishing practices.

Intermittent fasting does not significantly affect Glycosylated Hemoglobin (HbA1c), Low-Density Lipoprotein Cholesterol (LDL-C), or High-Density Lipoprotein Cholesterol (HDL-C) compared to control diets.

If your primary goal is to lower LDL cholesterol or improve HbA1c, intermittent fasting alone may not be sufficient. While it helps with weight, blood pressure, and triglycerides, it does not significantly change LDL, HDL, or long-term blood sugar markers (HbA1c). You may need to combine IF with other dietary strategies or medications to address these specific markers.

Artificial intelligence techniques, including fuzzy logic, neural networks, and reinforcement learning, are effective tools for automating blood glucose control and prediction in diabetes management, improving glycemic outcomes and reducing hypoglycemia risk compared to traditional methods or manual management.

For patients using insulin pumps or continuous glucose monitors (CGM), AI-driven 'artificial pancreas' systems can automatically adjust insulin delivery based on real-time glucose readings. This technology has been shown in multiple studies to improve blood sugar control and reduce dangerous low-blood-sugar events, particularly at night, compared to standard pump therapy. Patients should consult their endocrinologist about AI-integrated devices if they struggle with manual dose calculations or frequent hypoglycemia.

Premenopausal women are protected from developing NAFLD due to estrogen-mediated partitioning of fatty acids toward ketone body production and sex-specific browning of white adipose tissue, whereas postmenopausal estrogen deficiency facilitates massive hepatic steatosis and fibrotic progression.

For women, reproductive status is a critical factor in liver health. Before menopause, estrogen helps protect the liver by directing fat away from storage in the liver and towards energy use (ketones). After menopause, this protection vanishes, significantly increasing the risk of fatty liver and scarring, even if weight doesn't change drastically. Maintaining metabolic health becomes even more crucial post-menopause to counteract this hormonal shift.

Postmenopausal women have a higher prevalence of NAFLD than premenopausal women, and this risk is independently associated with menopause status even after adjusting for metabolic factors in some studies.

After menopause, your risk of fatty liver disease increases significantly, even if you maintain a healthy weight. This is largely due to the loss of estrogen. Regular liver health monitoring is recommended for postmenopausal women.

Dietary interventions do not significantly reduce symptoms of anxiety.

While improving your diet can help with depressive symptoms, it is not currently supported by evidence as a primary treatment for anxiety. If you are struggling with anxiety, rely on established treatments like therapy or medication, and use diet as a supportive tool for overall well-being rather than a specific anxiety cure.

Obesity is associated with impaired immune competence, including reduced antibody and IFN-gamma production, leading to increased susceptibility to infections and poorer vaccination responses.

Maintaining a healthy weight through balanced nutrition and regular physical activity can support your immune system. If you are obese, consider discussing weight management strategies with your healthcare provider to improve immune function and vaccination response.

Ageing is associated with immunosenescence, leading to increased susceptibility to infections and poorer responses to vaccination.

As you age, your immune system naturally weakens. Ensure you are up-to-date on vaccinations, including flu and pneumonia shots, and maintain a nutrient-rich diet to support your immune health.