Browse the evidence

Higher circulating levels of docosahexaenoic acid (DHA) are inversely associated with the risk of incident atherothrombotic stroke, while higher levels of docosapentaenoic acid (DPA) are inversely associated with cardioembolic stroke.

If you are concerned about stroke risk, maintaining healthy levels of specific omega-3 fatty acids like DHA and DPA may be beneficial. DHA appears to help prevent strokes caused by atherosclerosis (plaque buildup), while DPA may help prevent strokes caused by heart rhythm issues like atrial fibrillation. Since EPA did not show a significant association in this study, focusing on a balanced intake of all long-chain omega-3s through diet (fatty fish) or high-quality supplements is advisable, rather than relying on a single type.

GLP-1-based therapies achieve clinically meaningful weight loss (exceeding 10%) in type 2 diabetes and obesity by leveraging the gut-brain axis, specifically through the activation of satiety circuits in the brainstem (area postrema and nucleus of the solitary tract).

GLP-1 medications are currently the most effective pharmacological option for significant weight loss in people with obesity or type 2 diabetes. They work by mimicking a gut hormone that signals fullness to the brain. While they are injections, they are usually taken once a week. Common side effects like nausea are often temporary and can be managed by adjusting the dose. Consult a doctor to see if this treatment is appropriate for your specific health profile.

GLP-1 receptor agonists for obesity treatment cause significant loss of lean body mass (including muscle) and bone density, with muscle loss accounting for approximately 20% of total weight reduction in the absence of structured resistance training.

If you are taking GLP-1s for weight loss, you must incorporate resistance training (weight lifting or bodyweight exercises) at least 2-3 times per week. Without this, roughly 20% of the weight you lose will be muscle, not just fat. Ensure you are eating enough protein to support muscle retention during the caloric deficit.

Rapid and substantial weight reduction via GLP-1 therapy increases the risk of nutrient deficiencies and bone density loss, particularly when caloric intake drops below 1200 kcal/day for females or 1800 kcal/day for males without nutritional counseling.

Monitor your caloric intake. If you are eating less than 1200 calories (women) or 1800 calories (men) per day, you must prioritize nutrient-dense foods or consider a multivitamin/mineral supplement to prevent deficiencies in iron, calcium, vitamin D, and B12. Avoid rapid weight loss (>14% in 3-4 months) if possible to protect bone density.

In patients with type 2 diabetes mellitus, higher body weight variability (fluctuation) is associated with a significantly increased risk of cardiovascular events and mortality, independent of mean body weight and traditional risk factors.

If you have type 2 diabetes, avoiding large swings in your body weight is just as important for your heart health as maintaining a healthy average weight. Try to maintain consistent lifestyle habits rather than cycling through intense diets and regain, as this variability is linked to higher risks of heart attacks and stroke.

Short-term caloric restriction is insufficient for managing obesity because it fails to target the underlying mechanisms of the disease, whereas personalized, lifelong nutrition management is required.

Avoid 'diets' that end after a few weeks. Focus on a personalized, sustainable eating pattern that you can maintain for life to manage your weight and metabolic health.

Continuous Glucose Monitoring (CGM) is a mainstay of diabetes management that improves glycemic control by tracking time in range and tailoring drug regimens, and serves as a motivational tool for lifestyle choices.

If you have diabetes, ask about Continuous Glucose Monitoring (CGM). It helps you and your doctor adjust medications and see how food and exercise affect your blood sugar in real-time.

Global dietary patterns are suboptimal, with high intake of sodium, processed/red meat, and sugary beverages, and low intake of nuts, seeds, milk, and whole grains, contributing to 11 million deaths and 255 million DALYs annually.

Focus on increasing intake of whole grains, fruits, nuts, seeds, and milk, while reducing sodium, sugary beverages, and processed/red meat. Recognize that affordability is a major barrier, so prioritize accessible healthy options within your budget and advocate for systemic changes to make healthy food cheaper.

Shifting from nutrient-based to food-based dietary guidelines is supported by evidence that promotes predominantly plant-based diets for sustainable and healthy food systems.

Adopt a predominantly plant-based diet, focusing on whole foods rather than isolated nutrients. Advocate for policy changes to make healthy food more affordable and accessible, especially in low- and middle-income countries.

12 weeks of 500 mg/day Sensoril supplementation favors body mass distribution by reducing the increase in the android/gynoid ratio compared to placebo, without significantly altering total body fat or lean mass.

If you are looking to optimize body composition, 500 mg/day of Sensoril may help you maintain a healthier fat distribution (lower android/gynoid ratio) compared to placebo, even if it doesn't directly cause fat loss or muscle gain. This is a subtle benefit that supports long-term metabolic health.

12 weeks of 500 mg/day Sensoril supplementation improves perceived recovery scores and prevents the increase in perceived soreness seen with placebo in recreationally active men.

If you struggle with feeling sore or recovering slowly from workouts, 500 mg/day of Sensoril may help you feel more recovered and less sore after 12 weeks of training. This can help you stay consistent with your training schedule.

Lifestyle interventions (diet and physical activity) alone result in modest weight loss (2-9%) and are often insufficient for significant health improvements, though they remain a fundamental component of obesity management.

Lifestyle changes are essential but often result in only modest weight loss (2-9%) that is hard to maintain. For significant health improvements, lifestyle changes should be combined with other treatments like medications or surgery, especially if you have obesity-related health conditions.

High glycemic index (GI) carbohydrates induce metabolic damage primarily through rapid glucose absorption in the proximal small intestine, which stimulates GIP release from K cells, leading to lipogenesis, fatty liver, insulin resistance, and inflammation, whereas low GI carbohydrates bypass this mechanism.

To minimize metabolic damage from carbohydrates, prioritize foods with a low glycemic index (like isomaltulose, legumes, or whole grains) over high GI foods (like sucrose or white bread). This is because high GI foods are rapidly absorbed in the upper intestine, triggering GIP release which promotes fat storage, liver fat, and inflammation. Low GI foods are absorbed more slowly, bypassing the GIP-triggering K cells and instead stimulating beneficial GLP-1 release.

Resistance exercise increases the turnover (synthesis and degradation) of individual muscle proteins without necessarily increasing net protein abundance or synthesis rates, particularly when performed under a high-fat, low-carbohydrate diet.

If you are doing resistance training, expect your muscles to remodel by breaking down and rebuilding proteins, even if you don't see immediate size gains. This is normal adaptation, not failure. Ensure you are recovering adequately, as this turnover process is energy-intensive.

Implementing tiered or absolute sugar content taxes on sugar-sweetened beverages (SSBs) generates greater health gains and cost savings than volume-based taxes by incentivizing industry reformulation to reduce added sugar content.

For policymakers, adopting a tiered or absolute sugar tax is more effective than a flat volume tax because it forces manufacturers to reduce sugar in their products, leading to greater health benefits and cost savings for the healthcare system.

High intake of plant-based essential polyunsaturated fatty acids (ePUFAs), specifically linoleic acid (LA) and alpha-linolenic acid (ALA), is associated with increased lean body mass and reduced central adiposity, whereas marine-derived long-chain n-3 PUFAs (EPA/DHA) show no significant impact on body composition.

To support lean mass and reduce central fat, prioritize dietary sources of plant-based polyunsaturated fats (like linoleic acid from vegetable oils and alpha-linolenic acid from flax/nuts) over marine-derived fish oil supplements. While fish oil has cardiovascular benefits, current evidence suggests it does not significantly alter body composition in adults.

Higher achieved plasma phospholipid omega-3 fatty acid levels (from fish oil supplementation) are associated with a significantly lower risk of major perioperative bleeding.

Higher blood levels of omega-3 fatty acids from fish oil are linked to less bleeding during heart surgery. This suggests that ensuring adequate omega-3 status before surgery might be beneficial, though the primary finding is that fish oil itself is safe.

GLP-1 receptor agonists for obesity treatment cause significant loss of lean body mass (approximately 38% of total weight loss) and muscle mass, increasing the risk of sarcopenia and bone loss, particularly in the absence of structured resistance training and adequate protein intake.

If you are taking a GLP-1 medication for weight loss, expect to lose some muscle along with fat. To protect your strength and metabolism, you must prioritize resistance training (weight lifting or bodyweight exercises) and ensure you are eating enough protein. Without these steps, you risk losing significant muscle mass, which can happen with any rapid weight loss method.

Discontinuation of GLP-1 therapy for obesity leads to significant weight regain (up to two-thirds of lost weight within one year), even when accompanied by conventional nutritional counseling, highlighting the need for long-term lifestyle support.

If you stop taking your GLP-1 medication, you will likely regain a significant portion of the weight you lost, even if you try to eat well. This is because the medication helps manage hunger signals that return when you stop taking it. To maintain your weight loss, you need a robust, long-term lifestyle plan, not just standard diet advice, and you may need to stay on the medication long-term.

GLP-1 therapy for obesity increases the risk of nutritional deficiencies (e.g., iron, calcium, vitamins A, D, E, K, B1, B12, C) due to significant reductions in caloric intake and potential GI side effects that impair absorption.

Because GLP-1s make you eat much less, you might not get enough essential vitamins and minerals. Watch for signs like fatigue, hair loss, or poor wound healing. Prioritize nutrient-dense foods (vegetables, lean proteins, whole grains) and discuss with your doctor whether you need specific supplements, especially if your calorie intake is very low.

Short-term muscle disuse atrophy (4 days) in humans is driven by declines in muscle protein synthesis (MPS), not by increased muscle protein breakdown (MPB).

If you are immobilized or inactive for a few days, your muscle loss is caused by a drop in your body's ability to build new muscle protein, not by an increase in muscle destruction. To mitigate this, interventions should focus on stimulating muscle protein synthesis (e.g., through protein intake or resistance stimuli if possible) rather than just trying to block breakdown pathways.

The hypertrophic benefit of creatine supplementation is modestly greater in younger adults compared to older adults, although the effect remains small in both groups.

Younger lifters may see a slightly better muscle growth boost from creatine than older lifters, but the difference is small. Older adults should still use creatine as it provides a small benefit, even if the magnitude is lower than in youth.

GLP-1 receptor agonists (semaglutide, liraglutide, tirzepatide) provide a net health benefit for weight loss in non-diabetic adults with obesity, but only when the treatment goal is achieving ≥10% body weight loss; achieving 5% weight loss results in a net harm due to side effects.

If you are considering GLP-1 medications for weight loss without diabetes, understand that these drugs are most effective and 'worth it' if you aim to lose 10% or more of your body weight. Losing only 5% may actually result in a net negative health outcome due to side effects like nausea and vomiting. Ensure you are committed to lifestyle changes (diet and exercise) alongside the medication, and discuss your specific weight loss goals and tolerance for side effects with your doctor.

A reduction in waist circumference (WC) is significantly associated with a lower risk of heart failure with preserved ejection fraction (HFpEF), but not heart failure with reduced ejection fraction (HFrEF).

For people with type 2 diabetes, reducing waist size is particularly effective at preventing heart failure with preserved ejection fraction (HFpEF). While overall fat loss helps, targeting central adiposity (waist circumference) offers specific protection against this subtype of heart failure. Monitor your waist as a key health indicator.