Browse the evidence

Short sleep duration increases hypertension risk through mechanisms including elevated 24-hour blood pressure, increased sympathetic nervous system activity, and structural cardiovascular adaptations.

Sleeping less than 5 hours doesn't just make you tired; it keeps your blood pressure high all day and night, stresses your nervous system, and can physically change your heart and arteries over time. Consistent sleep is a structural necessity for blood pressure regulation.

Leptin-replacement therapy significantly improves glycemic control, reduces triglyceride levels, and decreases liver volume in patients with lipodystrophy and leptin deficiency.

If you have a rare condition called lipodystrophy that causes a severe lack of body fat and leptin, leptin replacement therapy can dramatically improve your blood sugar, lower dangerous triglyceride levels, and shrink your liver. This treatment is not for general obesity but is a critical therapy for this specific hormonal deficiency.

In patients at high cardiovascular risk who have achieved LDL-C goals, elevated triglycerides (≥1.7 mmol/L) and/or low HDL-C (<1.0 mmol/L) remain independent predictors of cardiovascular events, and therapeutic targeting of these markers provides incremental risk reduction.

If you are at high risk for heart disease and your LDL cholesterol is already at the target level, do not stop monitoring your lipids. Check your triglycerides and HDL levels. If triglycerides are high (≥150 mg/dL) or HDL is low (<40 mg/dL), discuss with your doctor. The first step is lifestyle changes (diet, exercise), but if these don't correct the levels, adding medications like niacin or fibrates, or intensifying your current therapy, may be necessary to further reduce your risk.

Obesity is primarily driven by long-term energy imbalance (calories consumed vs. expended), though food quality and source significantly modulate this relationship.

While energy balance is the fundamental driver of obesity, focusing exclusively on calorie counting may be less effective than prioritizing the quality and source of your food. The paper suggests that what you eat (food sources and nutrient quality) matters more than just how much you eat for controlling weight and preventing disease. Consider shifting your focus from strict calorie restriction to improving the nutritional quality of your diet.

Simplified front-of-pack nutrition labels (signposting) increase consumer interest and perceived ease of use, but do not guarantee real-world dietary behavior change due to cognitive load, skepticism, and resistance to perceived coercion.

For food manufacturers and policymakers: Simplified front-of-pack labels (like traffic lights or color-coded GDAs) are preferred by consumers for their ease of use. However, to avoid resistance, these labels must be transparent and non-coercive. Complex back-of-pack tables are often ignored; simplification is key, but it must balance simplicity with enough detail to satisfy consumers' desire for full information.

Adipocyte hypertrophy (enlargement) in white adipose tissue drives insulin resistance and metabolic disorders through inflammation, hypoxia, and lipotoxicity, whereas hyperplasia (increased adipocyte number) is associated with improved insulin sensitivity and metabolic health.

If you are gaining weight, understand that your body's response matters. If your fat cells are getting huge (hypertrophy), you are at higher risk for insulin resistance. If your body creates new, smaller fat cells (hyperplasia), it may be protecting your metabolic health. Strategies that promote adipogenesis (like certain medications or lifestyle changes that avoid extreme caloric surges) might be metabolically superior to those that just cause massive cell enlargement.

Cold exposure induces 'beiging' of subcutaneous white adipose tissue, converting it to a brown-like phenotype that increases energy expenditure and improves metabolic health.

Exposing your body to cold can activate brown and beige fat, which burns energy to create heat. This process, called 'beiging,' turns some white fat into metabolically active tissue. While the exact dose is debated, regular cold exposure may help improve metabolic health by increasing energy expenditure.

Ghrelin is the only known hormone that powerfully increases food intake, with levels surging before meals and suppressing after eating, playing a key role in meal initiation and hunger.

Ghrelin is your body's 'hunger hormone.' It rises before meals to prepare you for eating and falls after. Understanding this can help normalize the experience of hunger as a natural biological signal rather than a personal failing.

Activation of PPARα by omega-3 fatty acids (EPA/DHA) or synthetic fibrates increases fatty acid oxidation in metabolically active tissues (liver, heart, skeletal muscle), thereby lowering lipid levels and preventing hepatic steatosis.

To leverage PPARα for fat loss, focus on consuming omega-3 fatty acids (EPA/DHA) or prescribed fibrates. These compounds activate receptors that increase fatty acid oxidation in the liver and muscles, helping to clear lipids and prevent fat storage in the liver.

Postoperative use of CPAP or NIPPV reduces respiratory complications in OSA patients who were using these devices preoperatively.

If you use a CPAP machine at home, bring it to the hospital. Your medical team will help you use it immediately after surgery to keep your airway open and prevent breathing problems.

Long-term adherence to a sodium reduction intervention significantly reduces the risk of major cardiovascular events (myocardial infarction, stroke, revascularization, or cardiovascular death) in adults with prehypertension.

If you have high-normal blood pressure, reducing your sodium intake through counseling and dietary changes can significantly lower your risk of heart attacks, strokes, and cardiovascular death over the next 10-15 years. Focus on identifying sodium sources and preparing lower-sodium meals; your taste buds will likely adapt, making it easier to maintain.

Non-functional overreaching (NFOR) is a distinct stage from overtraining syndrome (OTS) characterized by a stagnation or decrease in performance that resolves with sufficient rest, whereas OTS involves prolonged maladaptation and may take months or years to recover.

Distinguish between short-term fatigue (functional overreaching) which leads to improvement, and non-functional overreaching (NFOR) where performance stalls. If you experience NFOR, prioritize rest and recovery for several weeks. If symptoms persist for months despite rest, suspect Overtraining Syndrome (OTS) and seek medical evaluation to rule out other causes.

Faecalibacterium prausnitzii levels are significantly lower in obese individuals with Type 2 Diabetes and are negatively correlated with inflammatory markers (hs-CRP, IL-6), suggesting its role in reducing low-grade inflammation independently of calorie intake.

Low levels of Faecalibacterium prausnitzii are linked to higher inflammation in obese people with diabetes. Surgery helps restore this bacteria, which may help lower inflammation. This benefit appears to happen regardless of how much the patient eats, suggesting the surgery itself creates a gut environment that supports this beneficial bacteria.

Body weight reduction significantly increases plasma levels of the anti-inflammatory protein adiponectin, with the magnitude of increase correlating with reductions in BMI and hip circumference.

For severely obese individuals, significant weight loss (whether through surgery or other means) triggers a beneficial hormonal response by increasing adiponectin, an anti-inflammatory protein. This suggests that reducing fat mass actively improves metabolic health by removing the 'brakes' on this protective hormone, potentially lowering cardiovascular risk.

Glutamine is a conditionally essential amino acid that serves as a primary fuel source for immune cells (lymphocytes, macrophages, neutrophils) and gut enterocytes, particularly during catabolic stress, sepsis, or intense exercise, where endogenous synthesis cannot meet demand.

If you are critically ill, recovering from major surgery, or suffering from severe sepsis, your body's demand for glutamine exceeds what it can produce. In these specific catabolic states, glutamine supplementation is often recommended to support immune cell function and gut integrity. For healthy, non-stressed individuals, endogenous production is usually sufficient, and the necessity of supplementation is less clear.

A single bout of resistance exercise increases mixed muscle protein synthesis (MPS) and breakdown (MPB) rates, with MPS elevation persisting for at least 48 hours, but net protein balance remains negative in the fasted state because MPB also increases.

If you want to build muscle, do not train in a fasted state. This study shows that while exercise boosts protein synthesis for 48 hours, it also boosts breakdown. In a fasted state, your body breaks down more protein than it builds, resulting in a net loss. To turn this exercise stimulus into muscle growth, you must consume protein to shift the balance from negative to positive.

Sensible sun exposure produces vitamin D3 in the skin, which is metabolized into 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D, regulating calcium/phosphate metabolism and influencing chronic disease risk (autoimmune, cancer, cardiovascular, infectious, schizophrenia, type 2 diabetes).

Get sensible sun exposure to support your vitamin D levels, especially if you live at higher latitudes, have darker skin, or are older. The body regulates production to prevent toxicity, so you don't need to worry about overdose from the sun. If you cannot get enough sun, consider food fortification or supplements as part of a three-part strategy.

Aging significantly decreases the skin's capacity to produce vitamin D3, requiring older adults to have greater sun exposure or supplementation to maintain healthy vitamin D levels.

As you age, your skin becomes less efficient at producing vitamin D from sunlight. You may need more sun exposure or consider supplementation to maintain healthy levels.

Higher adherence to a Mediterranean diet, as measured by a 14-item screener, is inversely associated with abdominal obesity (waist-to-height ratio) and general obesity in high-risk adults, independent of total caloric intake.

To reduce abdominal fat, prioritize a Mediterranean dietary pattern over simple calorie restriction. Focus on increasing intake of nuts, olive oil, vegetables, and fish, while reducing sweetened beverages and red/processed meats. Use the waist-to-height ratio as a more accurate health indicator than BMI alone. This approach is particularly effective for individuals with existing cardiovascular risk factors.

High consumption of ultra-processed foods (UPFs) is a primary driver of the global nutrition transition, leading to increased risks of obesity, type 2 diabetes, and cardiovascular disease due to their role as vectors for excessive intake of added sugars, sodium, and trans-fats.

Reduce intake of ultra-processed foods (UPFs) by focusing on whole or minimally processed foods. UPFs are characterized by industrial formulations with cosmetic additives, high sugar, sodium, and unhealthy fats. Prioritize foods that do not require extensive industrial processing to improve long-term metabolic health and reduce disease risk.

Ultra-processed foods act as significant vectors for 'risk ingredients' (added sugars, sodium, trans-fats, and cosmetic additives), contributing disproportionately to the intake of these harmful components compared to unprocessed foods.

Check labels for added sugars, sodium, and trans-fats. UPFs often contain high levels of these 'risk ingredients' even if they appear healthy (e.g., flavored yogurts, sauces). Reducing UPF intake naturally reduces the intake of these harmful components.

Daily supplementation with ordinary doses of vitamin D (ergocalciferol or cholecalciferol) is associated with a statistically significant decrease in all-cause mortality.

Take a daily vitamin D supplement (D2 or D3) in the range of 400-800 IU. This ordinary dose, shown in large studies to be safe, is associated with a modest but significant reduction in the risk of dying from any cause, independent of whether you also take calcium.

A Western diet high in animal protein, choline, and saturated fat promotes a specific gut microbiome profile (Enterotype 1) characterized by high Bacteroides and low Prevotella, which is associated with increased risk of metabolic diseases.

Adopting a plant-rich diet can shift your gut microbiome away from the 'Western' profile (high Bacteroides, low Prevotella) toward one associated with better metabolic health and higher microbial diversity.

Akkermansia muciniphila supplementation or enrichment improves insulin sensitivity, reduces body weight, and counteracts diet-induced metabolic syndrome in obese or insulin-resistant individuals.

Consider strategies to enrich Akkermansia muciniphila, such as consuming prebiotics like fructooligosaccharides (FOS) or exploring supplementation, to potentially improve insulin sensitivity and manage weight.