Browse the evidence

Dietary and circulating levels of Alpha-Linolenic Acid (ALA) show a non-significant trend toward lower diabetes risk, whereas EPA and DHA (from fish or supplements) show no significant association with diabetes incidence.

Taking fish oil (EPA/DHA) supplements or eating more fish does not appear to significantly lower your risk of type 2 diabetes based on this large review. Plant-based ALA (from flax, walnuts) shows a weak, non-significant trend toward benefit. Do not rely on omega-3s for diabetes prevention.

Elevated expression of the collagen VI alpha-3 chain (COL6A3) in human adipose tissue is associated with increased visceral adipose tissue mass, reduced adipocyte size, and heightened macrophage infiltration and inflammation.

High levels of collagen VI in fat tissue are linked to worse metabolic health, including more belly fat and inflammation. While you cannot directly 'take' collagen VI, understanding that obesity involves structural changes in fat tissue (fibrosis) highlights why simple calorie counting might not address inflammation. Interventions that reduce fibrosis, such as pioglitazone (a prescription drug), may help lower these markers, suggesting that tissue health is as important as weight loss.

Pioglitazone treatment decreases COL6A3 mRNA expression in obese patients with type 2 diabetes, with the magnitude of decrease proportional to baseline expression levels.

For individuals with type 2 diabetes, the medication pioglitazone has been shown to reduce markers of fat tissue fibrosis (COL6A3). This reduction is most pronounced in those with higher baseline levels. This suggests that pioglitazone may help remodel adipose tissue, potentially reducing inflammation. This is a prescription medication and should be discussed with a healthcare provider.

Regular snoring is independently associated with a significantly elevated risk of developing type II diabetes, even after adjusting for body mass index and other confounders.

If you snore regularly, especially if it is loud or frequent, you should be aware that it may increase your risk of type 2 diabetes independently of your weight. This is likely due to the stress snoring puts on your body's hormone systems during sleep. Consider discussing your snoring with a doctor, as treatments like CPAP or oral appliances might not only improve sleep quality but also potentially mitigate metabolic risks. Lifestyle changes like weight loss and exercise are still recommended, but addressing the snoring itself is a distinct health priority.

Caloric restriction in humans does not significantly alter DHEA-S levels, contrasting with findings in non-human primates, suggesting species-specific or age-specific differences in the endocrine response to CR.

Do not expect caloric restriction to boost DHEA-S levels in young, healthy adults. While CR improves other metabolic markers, its effect on this specific hormone appears to be null in this demographic, likely because human subjects in studies are younger and undergo CR for shorter periods than the primates where this effect was observed.

Elevated baseline plasma ceramide concentrations are positively associated with an increased risk of incident cardiovascular disease (CVD), including myocardial infarction, stroke, and cardiovascular death.

High plasma ceramide levels are linked to a higher risk of heart attacks, strokes, and cardiovascular death. However, this risk is not fixed; adhering to a Mediterranean diet (enriched with olive oil or nuts) can neutralize the increased risk associated with high ceramide levels, bringing it down to the level of those with low ceramide levels.

In human skeletal muscle disuse atrophy, muscle mass loss is primarily driven by a depression in protein synthesis (both fasted and fed states) rather than an elevation in protein breakdown (proteolysis).

When you immobilize a limb, your muscle shrinks mainly because it stops building protein, not because it actively destroys it. The muscle becomes 'resistant' to the normal building signals from food (amino acids). Therefore, simply trying to stop breakdown (e.g., with anti-catabolic drugs) may be less effective than addressing the failure of synthesis, potentially through mechanical loading or specific nutritional strategies that overcome this 'anabolic resistance', though the paper notes standard amino acid supplementation often fails to rescue this resistance in the short term.

Acute, transient increases in endogenous anabolic hormones (testosterone, GH, IGF-1) induced by resistance exercise do not enhance muscle protein synthesis (MPS) or intracellular signaling in the fed state.

Stop designing your workouts to spike hormones. High-volume, short-rest routines that cause massive hormonal surges do not build more muscle than moderate routines that don't. Focus on local muscle tension, adequate protein intake (25g+ post-workout), and consistency. The 'hormonal response' is not a proxy for hypertrophic potential.

DHA is most strongly associated with reduced risk of coronary heart disease (CHD) death, particularly arrhythmic CHD death, while DPA is most strongly associated with stroke death.

If you are concerned about heart rhythm issues, ensuring adequate DHA levels might be particularly important. For stroke prevention, DPA levels also show strong protective associations. This suggests that a balanced intake of all long-chain omega-3s (EPA, DHA, DPA) is beneficial, rather than focusing on just one.

Hypothalamic inflammation and neuronal injury, triggered by high-fat diets and elevated lipid metabolites, contribute to leptin resistance and the defense of elevated body fat mass.

High-fat diets can cause inflammation and injury in the hypothalamus, leading to leptin resistance. This biological resistance makes it harder to lose weight and maintain weight loss.

In prepubertal children, higher fasting plasma insulin concentrations predict increased rates of body weight gain and fat deposition, suggesting hyperinsulinemia may precede and drive obesity rather than being solely a consequence of it.

For families with a history of obesity or diabetes, monitoring fasting insulin levels in young children may be more predictive of future weight issues than current weight alone. High fasting insulin in lean children might signal a metabolic predisposition to store fat, suggesting early lifestyle interventions focused on insulin sensitivity (e.g., reducing refined carbohydrate intake) could be beneficial before significant weight gain occurs.

Ethnicity influences beta-cell functional capacity, with Asians having lower beta-cell regenerative capacity and insulin secretion compared to Caucasians, leading to T2DM at lower BMI levels.

If you are of Asian descent, be aware that you may develop Type 2 Diabetes at a lower body weight than Caucasians. This is due to biological differences in beta-cell capacity. Prioritize weight management and lifestyle changes even if your BMI is in the 'normal' range.

Frequent alcohol consumption (≥5 days/week) is inversely associated with the risk of developing type 2 diabetes, even when the total amount of alcohol consumed per day is low.

If you currently drink alcohol, spreading your consumption across at least 5 days a week appears to offer the greatest protection against type 2 diabetes, regardless of whether you drink a full drink or just a small amount on those days. The type of alcohol (beer, wine, liquor) does not significantly change this risk reduction. However, this does not mean you should start drinking if you don't already.

Insulin resistance in the myocardium serves as a protective mechanism against glucolipotoxicity by limiting glucose entry; overriding this resistance with high-dose insulin leads to mitochondrial dysfunction, oxidative stress, and cardiac injury.

Your body's insulin resistance in the heart is a shield against nutrient overload. Forcing more insulin into your system removes this shield, allowing too much glucose and fat into heart cells, which damages them. Respecting this resistance is key to heart health.

High sodium intake (>5 g/d) increases cardiovascular risk primarily in individuals with hypertension, whereas in normotensive individuals, the risk increase is less prominent or occurs only at much higher levels.

If you have high blood pressure, keeping your sodium intake below 5 grams per day is crucial to avoid increased cardiovascular risk. For those with normal blood pressure, the risk from high sodium may be lower, but moderation is still advised.

For early chronotypes (morning types), rotating night shift work increases type 2 diabetes risk as the duration of exposure increases, whereas for late chronotypes (evening types), daytime work schedules are associated with significantly higher diabetes risk compared to those working night shifts.

If you are a 'morning person' (early chronotype), long-term rotating night shifts significantly increase your type 2 diabetes risk. If you are a 'night owl' (late chronotype), working day shifts is actually riskier for your metabolism than working night shifts. Align your work schedule with your natural sleep preference to minimize metabolic risk.

South Asian and Aboriginal Canadian populations exhibit an unfavorable adipokine profile characterized by lower adiponectin and higher leptin levels compared to European and Chinese Canadians, which is associated with greater insulin resistance.

If you are of South Asian or Aboriginal descent, your body may naturally produce less adiponectin (a hormone that improves insulin sensitivity) and more leptin than other ethnic groups, even at the same weight. This makes you more prone to insulin resistance. Focus on managing your glycemic load (sugar and refined carb intake) to help mitigate this specific metabolic risk.

Treatment with the selective beta3-adrenoceptor agonist CL 316,243 increases insulin-mediated glucose disposal (IMGD) and fat oxidation in lean human males, without altering energy expenditure or body weight.

Taking CL 316,243 (1,500 mg/day) for 8 weeks improves how your body handles insulin and increases the amount of fat you burn during the day, even without changing your total calorie burn or losing weight. This effect is strongest in lean individuals and depends on maintaining the drug's presence in your blood.

Obese individuals with type 2 diabetes exhibit significantly lower expression of key adipogenic genes (SREBP1c, STAT5A, PPARγ2) in subcutaneous adipose tissue compared to obese non-diabetic individuals, which is associated with larger fat cell size and reduced insulin sensitivity.

For obese individuals with type 2 diabetes, the body's ability to create new fat cells (adipogenesis) is impaired compared to obese individuals without diabetes. This leads to existing fat cells becoming larger (hypertrophy), which is strongly linked to insulin resistance. The focus should be on improving metabolic health and insulin sensitivity, as this may support healthier fat storage dynamics.

Individuals with metabolically healthy obesity (MHO) do not significantly improve their cardiovascular and metabolic risk profiles through standard weight loss interventions (lifestyle, pharmacological, or bariatric surgery) compared to metabolically unhealthy obese individuals.

If you are obese but metabolically healthy (normal blood pressure, sugar, and lipids), standard weight loss programs may not improve your metabolic health further and might even temporarily worsen insulin sensitivity. Your focus should be on maintaining your current metabolic health and addressing non-metabolic issues like joint pain or fitness, rather than expecting weight loss to 'cure' your metabolic profile.

Metabolically healthy obesity (MHO) is a transient phenotype that often transitions to metabolically unhealthy obesity with aging, and MHO individuals still face increased risks for heart failure and non-metabolic comorbidities.

Being 'metabolically healthy' now does not mean you are immune to future metabolic disease. Your risk of developing diabetes or heart issues increases as you age, even if you are currently healthy. Regular monitoring and maintaining a healthy lifestyle are essential to delay or prevent this transition.

Mutations in the coding sequence of the human OB (leptin) gene are not a common cause of obesity in humans, despite causing obesity in mice.

This research suggests that for the vast majority of people with obesity, the cause is not a simple, single-gene mutation in the leptin pathway. This implies that lifestyle interventions (diet and exercise) are still relevant and potentially effective, as the biological machinery for regulating weight is likely intact, even if dysregulated by other factors.

Immobilization induces rapid muscle insulin resistance (MIR) within 3-5 days, which may contribute to the dysregulation of protein metabolism, although a direct causal link to atrophy is not fully established.

During periods of immobilization, your muscles become resistant to insulin within days. This hormonal shift likely contributes to the shutdown of muscle building. While you cannot always avoid immobilization, understanding this link highlights why metabolic health and potentially minimal movement (to stimulate glucose uptake) are important considerations alongside nutrition.

SGLT2 inhibitors (specifically empagliflozin) reduce cardiovascular mortality and heart failure hospitalization rates in patients with type 2 diabetes and established cardiovascular disease, independent of glycemic control.

If you have Type 2 Diabetes and existing heart disease, empagliflozin (an SGLT2 inhibitor) significantly lowers your risk of dying from heart causes and being hospitalized for heart failure. This benefit happens regardless of how much your blood sugar drops, suggesting it protects the heart directly. While side effects like genital infections are possible, the life-saving benefits for high-risk patients are substantial. This drug class is also being studied for heart failure patients without diabetes.