Browse the evidence

Nutrition policy change is primarily determined by political will and public will rather than the strength of scientific evidence alone.

To influence nutrition policy, do not rely solely on scientific data. Focus on building political will by engaging policy entrepreneurs, creating visible public support, and framing solutions in ways that align with political ideologies (e.g., protecting children) rather than just citing health benefits.

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.

Resistin acts as a pro-inflammatory mediator that impairs insulin sensitivity through multiple mechanisms, including inhibition of glucose transporter activity, suppression of GLUT4 translocation, and activation of inflammatory pathways like NF-kappaB.

Resistin is a hormone linked to inflammation and insulin resistance. While high levels are associated with metabolic issues, human data is inconsistent. Focus on reducing systemic inflammation through diet and exercise, which may positively influence resistin levels and insulin sensitivity.

Visfatin (also known as NAMPT or PBEF) exhibits insulin-mimicking effects in vitro by stimulating glucose uptake and insulin signaling pathways, but its physiological role in humans regarding insulin sensitivity remains controversial and unclear.

Visfatin has insulin-like properties in lab settings, but its role in human health is complex and not fully understood. Current evidence does not support using visfatin levels to guide treatment. Focus on proven lifestyle interventions for metabolic health.

Targeted elimination of senescent cells (senolysis) using pharmacological agents reverses age-related pathological changes and improves organ function in animal models.

Research indicates that clearing out 'zombie' (senescent) cells can improve heart function and reduce arterial stiffness in aging models. While specific senolytic drugs are still in development, the mechanism suggests that future therapies could target these cells to delay age-related diseases.

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.

There is insufficient evidence to determine the benefit of vitamin D, calcium, or combined supplementation for preventing fractures in community-dwelling men and premenopausal women.

For men and premenopausal women, current research does not provide enough information to say whether vitamin D and calcium supplements prevent fractures. Because the evidence is insufficient and there are known risks (like kidney stones), these supplements are not recommended for primary fracture prevention in these groups.

Obese individuals with type 2 diabetes exhibit a distinct gut microbiota signature characterized by increased relative abundance of Firmicutes and decreased abundance of Verrucomicrobia, Bacteroidetes, and Proteobacteria compared to healthy controls.

This research suggests that the specific gut bacteria in obese diabetic patients differ from healthy people, potentially contributing to insulin resistance. While this is an observational snapshot of a specific population, it implies that dietary changes (reducing high-carb/fat intake) and avoiding unnecessary antibiotics might help restore a healthier microbial balance, though this specific study does not test interventions.

The depletion of Verrucomicrobia in obese-T2DM patients is associated with a loss of anti-inflammatory state and improved insulin sensitivity, potentially allowing the growth of pro-inflammatory Proteobacteria.

The study suggests that losing certain beneficial bacteria (like Verrucomicrobia) might contribute to insulin resistance. This highlights the importance of gut health in diabetes management, though it does not prescribe a specific probiotic or treatment.

Increased abundance of gram-negative bacteria (Dialister and Allisonella) in obese-T2DM patients is associated with elevated lipopolysaccharide (LPS) levels, which mediates inflammatory response and contributes to insulin resistance.

This finding links specific gut bacteria to inflammation and insulin resistance via LPS. It suggests that maintaining gut barrier integrity and avoiding unnecessary antibiotics may be important for metabolic health, although no specific intervention is tested here.

Skeletal muscle functions as an endocrine organ by synthesizing and secreting myokines (e.g., IL-6, irisin, BDNF) in response to contraction, which exert beneficial effects on remote organs and systemic metabolism.

View exercise as a hormonal therapy, not just calorie burning. When you contract your muscles, they release signaling molecules (myokines) that improve metabolism, brain health, and inflammation. Consistent movement is required to maintain this endocrine function.

Myostatin acts as a negative regulator of muscle growth, and its inhibition is a therapeutic target for muscle disorders and metabolic diseases.

Myostatin is a hormone that naturally limits how much muscle you can build. While current treatments focus on inhibiting it pharmacologically, natural exercise may modulate these pathways, though the paper highlights pharmacological inhibition as the primary therapeutic avenue for muscle disorders.

Adropin34-76 treatment reduces incomplete fatty acid oxidation and increases the CoA/acetyl-CoA ratio in skeletal muscle, indicating improved mitochondrial function in obese mice.

This study indicates that obesity can lead to mitochondrial dysfunction, specifically incomplete fatty acid oxidation, which contributes to metabolic issues. Adropin treatment was shown to correct this by improving mitochondrial function. This suggests that maintaining healthy mitochondrial function is crucial for metabolic health, and future therapies may target these pathways.

Adropin34-76 treatment activates pyruvate dehydrogenase (PDH) and downregulates PDH kinase-4 (PDK-4) in skeletal muscle, promoting glucose oxidation in obese mice.

This study indicates that obesity can lead to reduced activity of pyruvate dehydrogenase (PDH), a key enzyme for glucose oxidation. Adropin treatment was shown to restore PDH activity, promoting glucose oxidation. This suggests that maintaining healthy enzyme activity is crucial for metabolic health, and future therapies may target these pathways.

EGCG stimulates autophagy in vascular endothelial cells via a CaMKK- and AMPK-mediated mechanism, leading to the degradation of lipid droplets and reduced ectopic lipid accumulation.

This research suggests that EGCG, a compound found in green tea, may help reduce fat accumulation in blood vessel cells by triggering a cellular cleanup process called autophagy. While this is a laboratory finding using animal cells, it highlights a potential cardiovascular benefit of green tea consumption.

Caloric restriction (CR) extends lifespan and delays aging-related diseases in mammals by reversing age-associated aberrant DNA methylation patterns and activating SIRT1-mediated histone deacetylation.

Caloric restriction, defined as reducing total calorie intake by 25-60% while ensuring all essential nutrients are consumed, is the most effective known environmental intervention for extending lifespan in animal models. It works by triggering epigenetic changes, specifically reversing age-related DNA methylation errors and activating SIRT1, which improves genomic stability and delays disease onset. While direct long-term human lifespan data is lacking, short-term human studies show CR improves metabolic markers like glucose homeostasis and blood pressure.

Caloric restriction prevents or delays the onset of specific aging-related diseases, including cancer, diabetes, cardiovascular disease, and neurodegenerative disorders, in rodents and nonhuman primates.

For humans, strict caloric restriction has been associated with improved biomarkers for diabetes (glucose homeostasis), cardiovascular health (blood pressure, lipid profiles), and potentially reduced risk of neurodegenerative diseases. While it may not guarantee disease prevention, it significantly lowers risk factors associated with these conditions.

Aging is associated with a significant decrease in the abundance of beneficial gut bacteria, particularly Bifidobacteria, and a reduction in the production of short-chain fatty acids (SCFAs) like butyrate, which contributes to gut inflammation and immune system decline.

As you age, your gut naturally loses some beneficial bacteria and produces fewer anti-inflammatory compounds. To counter this, prioritize fiber-rich plant-based diets and consider probiotics/prebiotics to support Bifidobacteria and SCFA production, helping to reduce inflammation and support immune health.

GIP receptor antagonists can promote weight loss in non-human primates and rodents, challenging the view that GIP promotes obesity.

Blocking GIP receptors (antagonism) has been shown to reduce weight gain in animal models, suggesting that endogenous GIP may play a role in promoting obesity. This supports the development of GIP antagonists for weight management.

The COVID-19 pandemic led to decreased food intake, skipping warm meals, and weight loss in a subset of older adults, predisposing them to undernutrition.

If you are an older adult, be aware that the pandemic's stress and isolation may have led you to eat less, skip meals, or lose weight. This is a common reaction, especially for those who are older, live alone, or have functional limitations. To manage this, try to eat smaller, more frequent meals and focus on nutrient-dense foods.

High adherence to a Mediterranean diet is associated with longer leukocyte telomere length (LTL) and higher PBMC telomerase activity in elderly individuals, independent of age, gender, and smoking status.

Adhere closely to a Mediterranean dietary pattern (high intake of vegetables, legumes, fruits, cereal, fish, and monounsaturated fats; low intake of meat and dairy) to support telomere maintenance and potentially slow cellular aging. This involves prioritizing plant-based foods and healthy fats while limiting processed meats and dairy.

Higher telomerase activity is independently associated with better health status (defined as absence of chronic diseases and high functional independence) in the elderly, regardless of telomere length.

Focus on maintaining high telomerase activity through a healthy lifestyle, particularly a Mediterranean diet, as this enzyme activity is a strong independent predictor of remaining disease-free and functionally independent in old age.

Supplementing with NAD+ precursors (specifically Nicotinamide Riboside or Nicotinamide Mononucleotide) or inhibiting NAD+-consuming enzymes (PARP/CD38) restores mitochondrial function and improves metabolic health in models of mitochondrial disease, aging, and age-related disorders.

Current evidence from animal and cell models suggests that maintaining or boosting NAD+ levels via precursors (like NR or NMN) or lifestyle factors (fasting, exercise) may support mitochondrial health and metabolic function, particularly in aging or disease states. However, optimal dosing, safety, and efficacy in healthy humans remain to be determined by future clinical trials.

Higher body weight is associated with increased longevity and lower all-cause mortality, with the nadir of the mortality curve occurring at weights above the cohort mean.

Do not assume that losing weight will automatically extend your life, especially if you are already in a healthy or slightly overweight range. The data suggests that for many adults, maintaining a weight slightly above the statistical 'mean' may be associated with better survival outcomes, potentially due to metabolic reserves or socioeconomic factors. Focus on overall health markers and lifestyle rather than just the number on the scale, and be wary of extreme weight loss without medical necessity.