Browse the evidence

Lower baseline beta cell function (measured by postprandial C-peptide index) is strongly associated with poorer glycemic control, higher HbA1c, and greater glycemic variability, regardless of whether the patient is treated with oral agents or insulin.

Your body's remaining ability to make insulin is the best predictor of how well your diabetes will be controlled. Even if you take medication, if your beta cells are failing, your blood sugar will be harder to manage. This highlights why preserving beta cell function is critical.

Decreased CPT1b expression in white adipose tissue does not quantitatively decrease whole-body energy expenditure enough to contribute to an obese phenotype.

Focusing on increasing fat tissue metabolism via CPT1b is likely ineffective for weight loss because fat tissue naturally has very low CPT1 activity compared to muscle and liver. Weight management strategies should prioritize interventions affecting metabolically active tissues or overall energy balance rather than targeting fat-specific fatty acid oxidation enzymes.

A higher ratio of bars/pubs to liquor stores in one's local food environment is positively associated with an increased risk of obesity and abdominal obesity.

Living in an area with many bars and pubs relative to liquor stores increases your risk of obesity, particularly around the waist. This is likely due to the high-calorie food and alcohol served in these establishments. Be mindful of your local bar density and its potential impact on your health.

Fasting plasma adropin concentrations are positively correlated with fat consumption (total and saturated) and negatively correlated with carbohydrate intake as a percentage of total energy in human females.

This research identifies a strong statistical link between higher fasting levels of the hormone adropin and a preference for high-fat diets in lean women. It does not prove that high fat intake causes high adropin, or vice versa. For women, this suggests a biological underpinning to fat preference that may be distinct from men. It does not currently offer a direct intervention protocol, but highlights adropin as a potential biomarker for dietary macronutrient selection.

Most dietary (poly)phenols are not absorbed intact in the small intestine but pass to the colon where gut microbiota catabolize them into absorbable metabolites, which then enter circulation and exert biological effects.

Eat a variety of plant-based foods rich in polyphenols (berries, tea, coffee, onions, citrus). You do not need to worry about the 'bioavailability' of the raw compound because your gut bacteria process them into active metabolites that enter your bloodstream. The specific benefits depend on your unique gut microbiome, so diversity in your diet helps ensure you have the right bacteria to process different polyphenols.

In the Greek adult population, the combined prevalence of overweight and obesity is approximately 47.5%, with significant gender and age-related variations where males exhibit higher overweight prevalence and obesity rates increase with age.

This survey indicates that nearly half of Greek adults are overweight or obese, with men carrying more excess weight and risk increasing as you age. This isn't just an individual issue but a population-wide trend driven by diet and activity levels. Focus on sustainable dietary changes and regular physical activity, as these are modifiable factors, regardless of how common they are in your social circle.

Hypertension and hyperlipidemia prevalence increases significantly with age, reaching 56% and 45% respectively in the elderly (≥65 years), indicating that age is a critical modifier for cardiovascular risk.

The risk of high blood pressure and high cholesterol rises sharply as you age, affecting more than half of the elderly population. However, these risks start rising in middle age. Regular monitoring and maintaining a healthy diet and activity level can help manage these risks at any age, not just in old age.

At physiological concentrations, insulin has a negligible thermic effect on its own; the majority of the thermic response to glucose/insulin infusions is driven by glucose metabolism (uptake, oxidation, and storage).

When you eat carbohydrates, the energy cost of processing them (thermic effect) is mostly due to the glucose being stored or oxidized, not the insulin released. While high insulin levels can slightly boost metabolism via the sympathetic nervous system, this effect is small at normal physiological levels. Focus on the total energy cost of nutrient processing rather than blaming insulin alone for metabolic inefficiency.

Higher central adiposity (measured by waist-to-hip ratio) causally increases the risk of kidney stone disease, mediated in part by elevated serum calcium concentrations.

Maintaining a healthy waist circumference is more critical for preventing kidney stones than general weight loss alone. Central fat raises serum calcium, which increases stone risk. Focus on reducing visceral fat through lifestyle changes to lower this specific biochemical risk.

South Asian patients with Type 2 Diabetes Mellitus (T2DM) face a disproportionately higher risk of Major Cardiovascular Events (MACE) and Chronic Kidney Disease (CKD) compared to White Europeans, even when South Asian patients are of normal weight or overweight status.

If you are South Asian and have Type 2 Diabetes, your risk for heart disease and kidney problems is significantly higher than that of White European patients, even if you are not overweight. Do not rely on BMI alone to gauge your health. You likely need more aggressive monitoring and management of blood pressure, lipids, and blood sugar than standard guidelines might suggest for your weight class.

Current cigarette smoking is independently associated with significantly lower toenail selenium levels in a dose-dependent manner, even after adjusting for dietary intake and other lifestyle factors.

If you smoke, your body likely has lower selenium levels than a non-smoker, even if you eat the same amount of selenium-rich foods. This is because smoking increases oxidative stress, which uses up your selenium stores faster. To maintain healthy selenium levels, you may need to be mindful of your selenium intake, potentially prioritizing selenium-rich foods like beef, bread, or Brazil nuts, or discussing supplementation with a healthcare provider, especially if you smoke heavily.

Geographic residence in the U.S. is a significant independent predictor of selenium levels, with individuals in the West and Northern Midwest having higher levels than those in the Southern Midwest.

Where you live in the U.S. affects your selenium levels, with people in the West and Northern Midwest generally having higher levels than those in the Southern Midwest. This is likely due to differences in soil selenium content affecting crops. If you live in a lower-selenium region, you can compensate by eating more selenium-rich foods like beef, bread, or Brazil nuts, or by considering a selenium supplement.

Acute intravenous administration of the non-specific beta-adrenergic agonist isoproterenol does not increase mitochondrial protein synthesis or markers of mitochondrial biogenesis in resting adult men.

Taking beta-agonists or experiencing acute stress does not directly build mitochondrial density in your muscles. While beta-blockers might blunt some training adaptations, simply stimulating the beta-receptors acutely is not a strategy to increase mitochondrial biogenesis in humans. Focus on established stimuli like endurance exercise for mitochondrial health.

Among patients with type 2 diabetes mellitus, higher body mass index (BMI) is associated with a significantly lower risk of total, ischemic, and hemorrhagic stroke, contradicting the standard assumption that obesity increases stroke risk in this population.

If you have type 2 diabetes, standard advice often pushes for weight loss to reduce health risks. However, this large study suggests that for diabetic patients, having a higher BMI (up to 40+) might actually be linked to a lower risk of stroke compared to having a normal or low BMI. This doesn't mean you should ignore your health, but it highlights that the 'obesity paradox' exists in diabetes. Focus on metabolic health markers (like blood sugar and blood pressure) rather than just the number on the scale, and discuss these specific findings with your doctor to tailor your care plan.

In patients with incident stroke, higher BMI (overweight and obesity classes I-III) is associated with a lower risk of major adverse cardiovascular events (MACE), peripheral vascular disease, cardiovascular mortality, and all-cause mortality compared to normal BMI.

If you have had a stroke, being overweight or obese might actually be associated with a lower risk of future heart problems and death compared to being normal weight. This does not mean you should gain weight, but it suggests that aggressive weight loss immediately after stroke might not be the priority. Discuss weight management with your doctor, keeping in mind that your current weight might be protective.

In patients with type 2 diabetes, elevated serum leptin levels are an independent predictor of ischemic heart disease incidence, providing prognostic value beyond traditional risk factors and non-invasive vascular markers.

For individuals with Type 2 Diabetes, high leptin levels signal a higher risk for heart disease, independent of weight or cholesterol. While leptin testing is not yet standard, managing inflammation and metabolic health remains critical. This data supports the importance of comprehensive cardiovascular risk assessment beyond just blood pressure and lipids.

Laparoscopic sleeve gastrectomy significantly reduces plasma Total Antioxidant Capacity (TAC), Total Oxidant Status (TOS), and DPPH radical-scavenging activity in morbidly obese patients over a 12-month period, indicating a restoration of redox homeostasis.

For morbidly obese individuals, bariatric surgery like sleeve gastrectomy significantly improves the body's antioxidant and oxidant balance over the first year, potentially reducing long-term health risks associated with oxidative stress. This benefit is achieved alongside strict adherence to post-operative dietary guidelines, including caloric restriction and specific vitamin supplementation.

Long-term intentional weight loss via intensive lifestyle intervention in obese adults with type 2 diabetes is associated with small relative deficits in global cognitive function and steeper rates of cognitive decline compared to a control group.

If you have type 2 diabetes and are obese, be aware that long-term, intensive weight loss programs might be associated with slightly faster cognitive decline compared to maintaining your current weight with standard diabetes education. This does not mean weight loss is bad for your heart or mobility, but it suggests that cognitive monitoring is important. The benefits for cardiovascular health are clear, but the cognitive trade-off in this specific group warrants caution and discussion with your doctor.

Activation of human brown adipose tissue (BAT) via cold exposure or pharmacological agents does not result in meaningful body weight loss and is not a viable strategy for obesity treatment.

Do not rely on cold exposure or brown fat supplements for weight loss. The energy burned by human brown fat is negligible compared to daily intake and is often offset by increased hunger. Focus on sustainable dietary changes and physical activity instead.

While BAT activation does not cause weight loss, it may improve insulin sensitivity and glucose metabolism in humans.

If you have detectable brown fat, cold exposure might improve your insulin sensitivity and glucose metabolism, even if it doesn't help you lose weight.

Successful weight loss and reversal of insulin resistance via combined nutritional and exercise interventions do not restore mitochondrial homeostasis in visceral adipose tissue (VAT), which remains characterized by irreversible mitochondrial dysfunction and metabolic plasticity breakdown.

For individuals who have successfully lost weight and improved insulin sensitivity, it is crucial to understand that visceral fat may retain permanent structural and functional damage (mitochondrial failure) from previous obesity. This means that while systemic health markers improve, the tissue itself may remain metabolically rigid. Continued lifestyle maintenance is essential not just for weight control, but to manage this residual tissue vulnerability.

Type 2 diabetic patients tend to experience a progressive decline in average body weight during the first 6 years after diagnosis, resulting in an average loss of 2.5 kg.

After being diagnosed with type 2 diabetes, it is common to lose an average of 2.5 kg over the next 6 years. This is often due to lifestyle changes and the physiological effects of the disease and treatment. This weight loss can be beneficial for your cardiovascular health.

Family doctors are primarily involved in obesity management through diagnosis (BMI measurement) and trial recruitment, rather than active care delivery, nutrition counseling, or physical activity advice.

If you are seeing a family doctor for obesity, expect them to measure your height and weight. Do not assume they will provide detailed diet or exercise plans unless they are part of a specific research trial or a specialized clinic. You may need to seek out specific behavioral interventions or referrals separately.

There is a significant disconnect between the extensive role family doctors are expected to play in clinical guidelines and the limited role they actually play in current practice and intervention studies.

Be aware that family doctors may not be able to provide comprehensive obesity management due to systemic constraints. Advocate for yourself by asking for specific referrals to dietitians, exercise physiologists, or behavioral health specialists if your doctor's role is limited to diagnosis.