Browse the evidence

Weight loss reduces glucose-stimulated insulin levels, and this reduction correlates with the decrease in testosterone, suggesting insulin resistance drives hyperandrogenism.

High insulin levels contribute to high male hormones in obese women. Losing weight lowers insulin, which in turn helps lower testosterone. Managing insulin through diet is key to treating hormonal imbalances.

Urbanization and the associated nutrition transition in Sub-Saharan Africa, characterized by increased availability and consumption of energy-dense foods (high fat, sugar, and animal protein) and decreased physical activity, is a primary driver of rising obesity and non-communicable disease rates.

In urbanizing Sub-Saharan African contexts, obesity is driven by structural shifts: increased availability of cheap, energy-dense processed foods (high fat/sugar) and reduced physical activity due to urban lifestyles. Interventions must address food environment and urban planning, not just individual diet advice.

Soft drink (sugar-sweetened beverage) consumption is positively associated with increased prevalence of overweight, obesity, and diabetes in low- and middle-income countries.

Reducing sugar-sweetened beverage intake is a key lever for preventing obesity and diabetes in developing economies, as even small increases in consumption correlate with measurable increases in disease prevalence.

Obesity impairs the immune response to pathogens, increasing susceptibility to severe infections like influenza, due to defects in T cell development, function, and vaccine efficacy.

Obesity weakens your body's ability to fight off viruses like the flu and reduces the effectiveness of vaccines. Maintaining a healthy weight is crucial for robust immune defense, especially during flu season or pandemics.

Oral administration of probiotic bacteria (specifically Lactobacillus and Bifidobacterium strains) significantly reduces serum cholesterol levels in humans and animals.

To lower cholesterol using probiotics, you must choose specific strains known for Bile Salt Hydrolase (BSH) activity, such as Lactobacillus plantarum, L. acidophilus, or Bifidobacterium species. Generic probiotics may not work. Consistent daily consumption of these specific strains (often found in fermented foods or supplements) has been shown to reduce cholesterol by 22-33% in studies, primarily by helping your body excrete bile acids, forcing your liver to use up stored cholesterol to make more.

GLP-1 receptor agonists reduce major adverse cardiovascular events (MACE) by 14% and all-cause mortality by 12% in patients with type 2 diabetes.

If you have Type 2 Diabetes and are at high risk for heart disease, ask your doctor about GLP-1 receptor agonists (like liraglutide or semaglutide). These medications have been shown to significantly reduce the risk of heart attacks, strokes, and death, in addition to helping with blood sugar control and weight loss.

Metformin reduces all-cause mortality by 36% and heart attack incidence by 39% in overweight patients with newly diagnosed type 2 diabetes without established cardiovascular disease.

If you have recently been diagnosed with Type 2 Diabetes and are overweight, metformin is likely your first medication. It not only helps control blood sugar but has been shown to significantly reduce the risk of heart attacks and death.

Endurance training reduces blood pressure primarily by lowering systemic vascular resistance through decreased sympathetic nervous system activity and renin-angiotensin system activity.

Understanding that exercise works by calming the nervous system and blood vessels can help motivate adherence, as these benefits accumulate over time with consistent training.

Higher serum levels of interleukin-6 (IL-6) and C-reactive protein (CRP) are significantly associated with increased mortality risk and poorer physical and cognitive performance in elderly individuals, including those classified as 'successfully aging'.

Monitor inflammatory markers like IL-6 and CRP as part of a comprehensive geriatric assessment. While these are predictive, they reflect underlying 'inflammaging.' Focus on modifiable drivers of inflammation such as maintaining a healthy weight (avoiding both underweight and obesity), managing cardiovascular risk factors, and ensuring adequate nutrition, as these are linked to lower inflammatory burden and better functional outcomes in aging.

High-protein diets increase energy expenditure through diet-induced thermogenesis (DEE) and gluconeogenesis, with complete proteins (like casein) producing a higher thermogenic response than incomplete proteins (like gelatin).

Choose complete protein sources (meat, dairy, eggs, soy) over incomplete ones (gelatin) to maximize the calories you burn during digestion. Complete proteins also support muscle building better.

Satiety from protein is driven by elevated plasma amino acids, ketone body production (in low-carb contexts), and diet-induced thermogenesis, with specific proteins like whey and alpha-lactalbumin showing higher satiating efficacy due to their amino acid profiles.

Eat protein-rich meals to feel full longer. Proteins like whey and alpha-lactalbumin are particularly effective at suppressing hunger due to their amino acid content. This helps you eat less without feeling deprived.

Regular exercise acts as a pharmacological agent that promotes health and longevity, but its efficacy and safety depend strictly on proper dosing (volume, intensity, frequency) and individual patient status.

Treat exercise like a prescription drug: consistency and correct dosage matter more than intensity. Aim for at least 150 minutes of moderate activity or 75 minutes of vigorous activity per week. If you are sedentary, start with a lower dose (e.g., 15 minutes daily) and gradually increase. Avoid extreme exhaustion if you are untrained, and do not rely on antioxidant supplements to enhance exercise benefits, as they may block the body's natural adaptation mechanisms.

Serum somatomedin-C (IGF-1) levels are highly sensitive to acute changes in nutritional status and correlate strongly with nitrogen balance, serving as a more responsive indicator of protein metabolism than total body nitrogen stores.

If you are monitoring your recovery from dieting or illness, serum IGF-1 (somatomedin-C) is a highly sensitive marker that reacts quickly to changes in your protein and energy intake. It changes much faster than your actual muscle mass or total body protein stores, making it a useful early warning system for nutritional deficits.

Adherence to a Mediterranean diet score is associated with a statistically significant reduction in all-cause mortality, driven primarily by moderate ethanol consumption, low meat intake, and high consumption of plant foods (vegetables, fruits, nuts, legumes) and olive oil.

Adhere to a Mediterranean dietary pattern emphasizing moderate alcohol (if consumed, with meals), low meat, and high intake of vegetables, fruits, nuts, legumes, and olive oil. This pattern is associated with a 14% lower risk of death compared to low adherence. Do not rely on fish, cereals, or dairy as primary drivers of these benefits in this context.

Medical Nutrition Therapy (MNT) is cost-effective for Medicare and private insurance, reducing overall healthcare utilization and costs, particularly for patients aged 55 and older.

For healthcare systems and insurers, covering MNT is a smart financial move, especially for older patients. It reduces the need for expensive hospital visits and physician appointments. For patients, accessing MNT through insurance (like Medicare) can be a cost-effective way to manage their diabetes and avoid expensive complications.

Long-term exercise training can increase Resting Metabolic Rate (RMR) through two mechanisms: increasing lean body mass and stimulating physiological processes that increase the metabolic rate per unit of lean tissue (residual RMR), although extreme interventions may suppress RMR.

Focus on building muscle and consistent training, not just cardio. This increases your Resting Metabolic Rate (RMR) not just by adding muscle mass, but by making your existing tissues more metabolically active. This helps counteract the metabolic slowdown that usually comes with weight loss.

High percentage of body fat and high BMI (≥30 for women, ≥35 for men) are associated with approximately double the likelihood of mobility-related functional limitations in adults aged 70 and older.

If you are over 70, maintaining a healthy body fat percentage and BMI is crucial for staying mobile. This study found that high body fat and high BMI significantly increase the risk of mobility issues, while low muscle mass alone did not show the same strong link. Focus on managing body composition through physical activity and diet rather than just trying to build muscle mass.

Women exhibit lower total daily energy expenditure than men independent of fat-free mass, and physical activity interventions result in smaller fat loss in women compared to men due to metabolic and compensatory dietary responses.

If you are a woman, expect your body to resist weight loss from exercise more than a man's would. This is biological, not a lack of willpower. Your body may compensate by eating more or moving less outside of workouts. Focus on strength training to preserve muscle mass and metabolic rate, and manage expectations regarding scale weight changes.

Non-alcoholic fatty liver disease (NAFLD) is associated with a 2- to 3-fold increased risk of developing type 2 diabetes (T2D), driven by hepatic insulin resistance, impaired beta-cell function, and lipotoxicity.

If you have been diagnosed with NAFLD, recognize it as a significant warning sign for type 2 diabetes. The presence of liver fat indicates underlying insulin resistance and beta-cell stress. Prioritize interventions that improve insulin sensitivity, such as weight loss and exercise, to mitigate this elevated risk.

Protein restriction (PR) and specific amino acid restrictions (e.g., methionine, BCAAs) improve metabolic health and extend lifespan/healthspan, likely mediated by mTOR inhibition.

Restricting protein intake, or specific amino acids like methionine or BCAAs, can improve metabolic health and extend lifespan in mice, and is linked to better health outcomes in humans. This suggests that optimizing protein quality and quantity, rather than maximizing it, may be beneficial for longevity.

Short-term aerobic exercise (as little as 4 days) significantly improves postprandial lipid profiles, reducing non-fasting triglycerides and LDL remnants.

You don't need to wait months to see benefits. Just 4 days of moderate exercise can help your body clear fats from your blood after meals, reducing heart disease risk. You can do this in one session or spread out over the day.

Robust skeletal muscle hypertrophy in humans requires satellite cell-mediated myonuclear addition, as expansion of the myonuclear domain beyond a threshold (~2,000 µm²) triggers the demand for new nuclei to support continued growth.

If you are struggling to add muscle size despite consistent training, your body may not be activating enough satellite cells to add new nuclei to your muscle fibers. This is often a genetic or 'non-responder' trait. To overcome this, you may need to focus on maximizing mechanical tension and recovery to stimulate the satellite cell pool, as simply training harder might not bypass this biological ceiling without the cellular machinery to support it.

Higher levels of education and higher socio-economic status (SES) are significantly associated with better nutrition knowledge, while men have poorer knowledge than women.

If you have lower education or income, you may face barriers to accessing clear nutrition information. Focus on learning basic labels: look at the back of the package for total fat, sugar, and fiber, rather than trusting front-of-package marketing claims like 'low-fat' or 'healthy.' Men should actively seek out nutrition information, as studies show they often have less knowledge than women, which can lead to less healthy dietary choices. Targeted education for these groups can help reduce health inequalities.

Food fortification significantly reduces the prevalence of inadequate micronutrient intakes in low-income regions, particularly for iron, vitamin A, and zinc, although its effectiveness varies by region and specific nutrient.

In regions where access to diverse, nutrient-dense foods is limited, supporting or consuming fortified foods (like fortified flour or oil) is a highly effective way to prevent micronutrient deficiencies, especially for iron, vitamin A, and zinc.