Browse the evidence

Middle-aged and older overweight/obese adults (≥50 years) experience similar or greater improvements in endothelial function from weight loss compared to younger adults (<50 years).

If you are over 50 and overweight, losing weight through diet can significantly improve your blood vessel health, potentially even more than it would for a younger person. Do not assume age limits the vascular benefits of weight loss.

BPD permanently normalizes serum glucose and cholesterol in diabetic and hypercholesterolemic patients through specific metabolic actions independent of weight loss.

BPD can cure type 2 diabetes and high cholesterol through specific hormonal and metabolic changes in the gut, not just by losing weight. Many patients see normal blood sugar and cholesterol levels within a month of surgery, often allowing them to stop medications entirely.

Delaying meal timing by 5 hours in healthy young men significantly delays the phase of plasma glucose circadian rhythms and reduces mean plasma glucose concentration, while delaying white adipose tissue (WAT) PER2 clock gene expression, without affecting the central master clock (melatonin/cortisol) or insulin/triglyceride rhythms.

If you work shifts or have jet lag, try shifting your main meals later to align with your new schedule. This won't change your sleep hormone (melatonin) timing, but it will help synchronize your body's peripheral clocks (like those in your fat tissue) and improve how your body handles glucose throughout the day. Keep meals isocaloric and consistent in composition.

Leptin has direct peripheral actions on immune cells, pancreatic beta cells, adipocytes, and skeletal muscle, influencing processes like fatty acid metabolism and insulin sensitivity.

Leptin doesn't just affect your brain; it directly influences how your muscles burn fat and how your pancreas handles insulin. This highlights the systemic nature of metabolic regulation.

Orlistat improves glycemic control and reduces the need for diabetes medication in patients with Type 2 Diabetes, independent of weight loss alone.

If you have Type 2 Diabetes, Orlistat can help lower your blood sugar and HbA1c levels more than diet alone, potentially allowing you to reduce your diabetes medication dosage. This benefit appears to go beyond just the weight loss itself.

Women with type 2 diabetes face a significantly higher relative risk of cardiovascular disease and mortality compared to men, despite often being diagnosed at a lower body mass index and younger age.

If you are a woman with type 2 diabetes, your risk of heart disease and death is higher relative to a man with diabetes, even if your weight is lower. This risk is amplified by hormonal changes like menopause and pregnancy history. You need aggressive management of blood pressure, lipids, and glucose, potentially starting earlier than guidelines might suggest for men, because your body may have more advanced heart vessel damage at the time of diagnosis.

Visceral adipose tissue (VAT) is a stronger independent risk factor for type 2 diabetes in women than in men, making waist circumference a more reliable predictor of risk in women.

For women, where you store fat matters more than your total weight. Visceral fat (around your organs) is a much stronger predictor of diabetes than BMI. Focus on reducing waist circumference through lifestyle changes, as this visceral fat drives insulin resistance more significantly in women than in men.

Leptin levels can be used to adjust BMI estimates to better predict percent body fat, particularly in women with high leptin levels (>30 ng/mL).

If you are a woman with high body fat but a 'normal' BMI, ask your doctor about checking your leptin level. It might help explain your health risks. A high leptin level suggests your body is resisting the hormone that controls hunger, which is common in obesity.

Revised BMI cutoffs of 24 for women and 28 for men better predict obesity (defined by DXA percent body fat) than the standard cutoff of 30.

If you are a woman, your 'obese' BMI might be lower than 30 (e.g., 24-29). If you are a man, it might be 28-29. This doesn't mean you are 'fat' in a cosmetic sense, but it may indicate high body fat relative to muscle, which increases health risks. Discuss this with your doctor.

Dietary intake of n-3 polyunsaturated fatty acids (specifically DHA and EPA from fish oil) preferentially inhibits Toll-like receptor (TLR2 and TLR4) signaling, thereby suppressing the expression of inflammatory markers like COX-2 and NF-kB activation in immune cells.

To reduce inflammatory signaling in your immune cells, prioritize high doses of n-3 polyunsaturated fatty acids (found in fish oil, specifically DHA and EPA). This paper suggests that a high intake (around 15g of fish oil daily in the study context) is required to significantly suppress the inflammatory response triggered by immune challenges. Conversely, high intake of saturated fats (like lauric acid) may exacerbate this inflammatory signaling.

Dual-Energy X-ray Absorptiometry (DXA) is a precise, safe, and widely available method for assessing body composition, specifically Lean Soft Tissue (LST) and Appendicular Skeletal Muscle (ASM), though it has limitations regarding body thickness and hardware variability.

If you need an accurate assessment of your muscle mass (specifically in arms and legs) and body fat, DXA is the preferred clinical tool due to its high precision and safety. It is increasingly available as a 'secondary' use of osteoporosis scanners. Ensure the machine is properly calibrated, as results can vary between manufacturers.

Adjuvant chemotherapy causes sarcopenic obesity, characterized by increased fat mass and decreased or stagnant lean body mass, particularly in the legs.

Chemotherapy often causes 'sarcopenic obesity,' where you gain fat but lose muscle, especially in your legs. This is different from normal weight gain. To counteract this, prioritize resistance training (strength exercises) for your lower body to preserve muscle mass, rather than just focusing on the number on the scale.

Consumption of flavanol-rich dark chocolate (100g/day containing 88mg flavanols) for 15 days significantly reduces 24-hour ambulatory blood pressure and improves insulin sensitivity in patients with essential hypertension.

For individuals with mild hypertension, consuming 100g of high-flavanol dark chocolate daily (substituting for other foods to maintain calorie balance) for two weeks can significantly lower blood pressure and improve insulin sensitivity. This benefit is specific to dark chocolate with high flavanol content, not white chocolate or standard commercial chocolate.

Flavanol-rich dark chocolate improves endothelium-dependent vasodilation (FMD) and reduces LDL cholesterol in patients with essential hypertension.

In addition to lowering blood pressure, this specific dark chocolate intervention also improves blood vessel function and lowers LDL cholesterol in hypertensive patients.

Cancer survivors, particularly those with early-stage breast or prostate carcinoma, exhibit high receptivity to health promotion interventions delivered via mailed brochures, with a strong preference for initiating these programs at or shortly after diagnosis (within 6 months).

If you or a loved one has been diagnosed with early-stage breast or prostate cancer, expect that health providers may send you informational brochures by mail soon after diagnosis. This is a recommended and preferred method for many survivors to learn about diet, exercise, and smoking cessation changes without the pressure of immediate face-to-face counseling. Review these materials at your own pace.

Cancer survivors, particularly men with prostate cancer and African American patients, consume significantly fewer than the recommended 5 daily servings of fruits and vegetables, indicating a need for targeted nutritional interventions.

Most cancer survivors do not eat the recommended 5 daily servings of fruits and vegetables. Men and African American patients are particularly likely to fall short of this goal. To improve health outcomes, consider using mailed educational resources or working with a dietitian to gradually increase fruit and vegetable intake, as this is a common area for improvement among survivors.

Cancer survivors demonstrate high levels of routine physical activity compared to the general population, with many maintaining exercise habits for over 6 months, although a significant portion remains sedentary.

Many cancer survivors are already physically active, often more so than the general population. If you are not currently exercising, you are not alone, as 40% of respondents reported no routine exercise. Consider starting with moderate activity, such as walking, and utilize mailed educational resources to help establish a sustainable routine.

Omega-3 LC-PUFAs (EPA/DHA) lower fasting plasma triglyceride (TG) levels by 29% in individuals with levels >150 mg/dL when taken at doses of 3.4–4 g/day, primarily by inhibiting de novo lipogenesis via SREBP1c regulation.

If your triglycerides are high (over 150 mg/dL), standard fish oil doses won't fix it. You likely need a therapeutic dose of 3.4–4 grams of EPA/DHA daily to see a ~29% drop in triglycerides. Consult a doctor for this high-dose protocol, as it is distinct from general health maintenance doses.

Omega-3 LC-PUFAs exert anti-inflammatory effects by generating specialized pro-resolving mediators (SPMs) like resolvins, protectins, and maresins, which actively promote the resolution of inflammation rather than just suppressing it.

Omega-3s do more than just reduce swelling; they help your body actively resolve inflammation and return to normal function through specialized mediators called SPMs. This supports long-term health in autoimmune and inflammatory conditions.

Dietary restriction (DR), particularly caloric restriction, is the most robust non-genetic intervention shown to extend lifespan across multiple species, from yeast to mammals.

While the paper does not provide a human protocol, it establishes that caloric restriction is the most robust non-genetic method for extending lifespan in biological models. For humans, this translates to exploring nutrient-dense, energy-restricted diets under medical supervision, with the goal of mimicking the genetic and metabolic benefits observed in model organisms, such as those identified in the GenDR database.

Men who spend more than 10 hours per week riding in a car or more than 23 hours per week in combined sedentary behaviors (car riding plus TV viewing) have a significantly higher risk of cardiovascular disease mortality compared to those with lower sedentary time, even after adjusting for physical activity levels.

If you spend more than 10 hours a week driving or over 23 hours a week on sedentary activities like driving and watching TV, your risk of dying from heart disease is significantly higher, even if you exercise. To protect your heart, try to break up long periods of sitting and reduce total sedentary time in addition to staying active.

High levels of physical activity are associated with notably lower rates of cardiovascular disease mortality even in the presence of high levels of sedentary behavior, suggesting that physical activity mitigates but does not entirely eliminate the risk associated with sedentary time.

Being physically active significantly lowers your risk of heart disease death, even if you sit for long periods. However, to get the best protection, you should also try to reduce your total sedentary time. Don't rely on exercise alone to offset the risks of a sedentary lifestyle.

Whole-of-dietary interventions significantly reduce symptoms of depression compared to control conditions, with a small-to-moderate effect size (Hedges' g = 0.275).

Improving your overall diet quality, whether by focusing on nutrients, reducing fat, or managing weight, can help reduce depressive symptoms. This is supported by a large body of research involving tens of thousands of people. You don't need a perfect diet, but making whole-of-diet changes is more effective than focusing on single nutrients.

Adequate intake of essential micronutrients (Vitamins A, B6, B12, C, D, E, folate, zinc, selenium, copper, iron) is required to support optimal immune function and reduce susceptibility to infections.

Ensure your diet includes a wide variety of fruits, vegetables, lean proteins, and whole grains to get essential vitamins and minerals. This supports your immune system's ability to fight off infections. If you have known deficiencies, consult a healthcare provider for testing and targeted supplementation.