Browse the evidence

BCAA supplementation may attenuate muscle soreness and recovery decrements in resistance-trained athletes, but effects are inconsistent in endurance sports.

If you do heavy resistance training, BCAAs might help slightly with muscle soreness, but the evidence is not strong enough to recommend them as a primary recovery tool. Focus on post-workout meals with complete protein. For endurance athletes, BCAAs do not consistently help with recovery or soreness.

Gut microbiota composition and metabolites play a critical role in the crosstalk between dietary patterns and cardiometabolic health, suggesting personalized dietary strategies based on microbiota profiles.

While general healthy dietary patterns are beneficial, individual responses vary. Future personalized nutrition strategies may involve testing gut microbiota to tailor dietary patterns for optimal cardiometabolic health.

Weekly subcutaneous administration of IBI362, a GLP-1 and glucagon receptor dual agonist, produces significant body weight loss and improves metabolic parameters in Chinese adults with overweight or obesity.

IBI362 is a once-weekly injection that helps overweight and obese Chinese adults lose weight and improve metabolic health. It works by targeting two hormones (GLP-1 and glucagon) to reduce appetite and increase energy expenditure. In this study, participants lost between 4.8% and 6.4% of their body weight over 12 weeks, with side effects like nausea being mostly mild. This suggests it is a viable option for those seeking pharmacological weight loss support.

Time-restricted eating (TRE), specifically early TRE, can improve cardiometabolic markers such as blood pressure and glucose control even in the absence of weight loss (eucaloric conditions).

If you have prediabetes, try eating within an early window (e.g., 8 am to 4 pm) without changing your total calories. You might see improvements in blood pressure and blood sugar control even if your weight stays the same.

High-volume resistance training (>10 sets per muscle group) performed in a fasted state may benefit from acute carbohydrate supplementation compared to fasting or non-caloric placebo, likely due to glycogen sparing effects.

If you do a very high-volume leg or back session (e.g., 15+ sets) and you train fasted, consider eating carbohydrates before or during the workout. It will likely help you get more reps or sets. If you train fed, or do low volume, you don't need to worry about pre-workout carbs.

High baseline abundance of Bacteroides cellulosilyticus predicts significant weight gain (0.65 kg) in overweight subjects consuming 10.4 g/day of arabinoxylan oligosaccharides (AXOS) for 4 weeks, whereas low abundance predicts weight stability.

If you are overweight and trying to use high-fiber wheat bran supplements (like AXOS) to manage weight, your gut bacteria matter. If you have high levels of Bacteroides cellulosilyticus, you might stay stable. If you have low levels, you might actually gain weight. Standard 'eat more fiber' advice may need personalization based on gut health testing.

Adherence to a Mediterranean or Okinawan dietary pattern, characterized by high whole-grain intake and a low protein-to-carbohydrate ratio (significantly less than 1), reduces cardiovascular mortality and slows aging progression.

To support longevity, prioritize a dietary pattern like the Mediterranean or Okinawan diet. This involves eating plenty of whole grains, vegetables, and legumes while keeping the ratio of protein to carbohydrates low (less than 1:1). Focus on whole grains rather than refined grains to maximize fiber and nutrient intake.

Low-carbohydrate diets can be effective for improving diabetes-related outcomes and triglycerides, but their impact on cardiovascular health depends heavily on the source of replaced macronutrients (plant-based vs. animal-based).

If you choose a low-carbohydrate diet, ensure it is plant-based, emphasizing vegetables, nuts, seeds, and legumes. Avoid animal-based low-carbohydrate diets, as they are associated with increased mortality. Monitor lipids closely, as LDL-C may increase.

Egg consumption up to <1 egg per day is associated with a lower risk of cardiovascular disease, including hemorrhagic stroke, in the general population, but may increase risk in diabetic populations.

You can include up to one egg per day in your diet as part of a healthy eating pattern. Eggs are a good source of protein and micronutrients. If you have diabetes, consult your healthcare provider, as higher egg intake may be associated with increased CVD risk in this group.

Performing low-load resistance exercise (30% 1RM) to volitional fatigue during periods of physical inactivity preserves type II muscle fiber cross-sectional area and satellite cell content in older adults.

If you are older and forced to be inactive (e.g., due to injury or illness), do not stop exercising. Perform resistance exercises with light weights (about 30% of your max) until you are completely exhausted. Do this three times a week. This will help you keep your muscle size and health, especially in your fast-twitch muscle fibers, which are most likely to shrink when you stop moving.

Resistance training adaptations (body composition, muscle strength, and functional capacity) are significantly attenuated in elderly women with sarcopenic obesity compared to those without the condition.

For elderly women with sarcopenic obesity, standard resistance training protocols (2x/week) may not yield the same body composition or functional improvements seen in non-obese peers. To see better results, these individuals may need higher training frequencies (3x/week), longer intervention durations, or combined dietary interventions to address the underlying lipotoxicity and anabolic resistance.

Tirzepatide significantly reduces HbA1c and body weight in adults with Type 1 Diabetes (T1D) without increasing the risk of diabetic ketoacidosis (DKA) or time below range.

If you have Type 1 Diabetes and struggle with weight or high blood sugar despite insulin, ask your doctor about tirzepatide. This study shows it can lower your A1c and help you lose significant weight (over 10% in some cases) without increasing the risk of dangerous ketones or low blood sugar, provided it is managed carefully by a specialist.

Newer emerging anti-obesity medications, specifically GLP-1/GIP/Glucagon receptor agonists (e.g., tirzepatide, retatrutide), demonstrate superior weight loss efficacy compared to older single-mechanism drugs.

Newer drugs like tirzepatide (Mounjaro/Mounjaro) can lead to nearly 21% weight loss in some patients, significantly higher than older drugs. These require weekly injections and are more expensive. Discuss with your doctor if the higher efficacy justifies the cost and injection burden for your specific health goals.

Empirical metrics such as the 10:1 carbohydrate-to-fiber ratio (and modified versions including added sugar limits) effectively identify high-quality carbohydrate products and are associated with better cardiometabolic health markers, including lower triglycerides and improved insulin sensitivity.

When choosing packaged carbohydrate-rich foods, look for the 10:1 carbohydrate-to-fiber ratio. This means for every 10 grams of total carbohydrate, there should be at least 1 gram of fiber. Modified ratios that also limit added sugars (e.g., <1g or <2g added sugar per 10g carb) are even better. This simple metric helps you avoid refined grains and added sugars while prioritizing nutrient-dense options.

Participation in a one-unit Foodprint seminar significantly increases vegetable intake and decreases ruminant meat consumption, resulting in a 14% reduction in dietary carbon footprint among college students.

To reduce your dietary carbon footprint, consider taking a course or workshop focused on food systems and sustainability. This specific 'Foodprint' model uses active learning to help you calculate the environmental impact of your food choices. The result is a measurable increase in vegetable consumption and a decrease in ruminant meat (beef/lamb) and sugar-sweetened beverages, leading to a significant reduction in your dietary carbon footprint.

Sarcopenic obesity in elderly women is associated with significantly lower muscle strength and lean body mass, along with elevated pro-inflammatory markers (specifically IL-6) and glucose levels compared to nonsarcopenic obesity.

For elderly women, carrying excess fat combined with low muscle mass is worse for inflammation and strength than carrying excess fat alone. Screening for 'sarcopenic obesity' using appendicular lean mass relative to BMI can identify those at highest risk for disability, allowing for earlier, targeted strength and nutrition interventions.

Adherence to a carnivore diet (eliminating plant foods) for at least 6 months is associated with self-reported improvements in metabolic health markers, including significant reductions in BMI and HbA1c, and high satisfaction rates, despite reported elevations in LDL-cholesterol.

If you adopt a carnivore diet (eating only animal products) for at least 6 months, you may experience significant weight loss and improved blood sugar control, with high satisfaction. However, be aware that your LDL cholesterol may rise significantly, although other heart health markers like triglycerides often improve. This data comes from a self-reported survey, so individual results may vary, and long-term safety is not fully established.

The NOVA classification system, which categorizes foods based on the extent and purpose of processing, is a more useful framework for public health than nutrient-based classification systems.

Use the NOVA framework: prioritize unprocessed or minimally processed foods (Category 1), limit processed culinary ingredients (Category 2), and avoid ultra-processed foods (Category 4). This is simpler and more effective than focusing solely on nutrient counts.

AI-driven behavioral weight loss (BWL) interventions using reinforcement learning can achieve weight loss outcomes (approx. 7%) comparable to intensive human coaching but with significantly reduced contact hours (one-third the coaching time).

If you are struggling with the cost or availability of intensive weight loss coaching, look for programs that use AI-driven behavioral coaching. These systems can adapt to your progress in real-time, potentially offering similar weight loss results to intensive human coaching but with less required contact time. Ensure the program uses dynamic feedback (like text or app notifications) rather than just static advice.

Mobile health (mHealth) applications and wearable technology can lead to modest reductions in body weight and BMI, but long-term benefits may diminish once device usage stops, suggesting the Hawthorne effect or need for continuous engagement.

Using a fitness tracker and health app can help you lose a small amount of weight and improve your BMI, but you must use it consistently. If you stop using the device, the benefits may disappear. To make it work, integrate it into your daily routine and consider it a tool for accountability rather than a magic solution.

Consumption of Sugar-Sweetened Beverages (SSBs) is positively associated with higher BMI in women, but not significantly in men, in this rural South African population.

Women in this community should prioritize reducing Sugar-Sweetened Beverage (SSB) intake, as it is linked to higher BMI. Men may not show the same strong link, but reducing SSBs is still a recommended public health target.

Long-term Time-Restricted Feeding (16/8 protocol, 4 weeks) improves Wingate Test mean power and total work output in well-trained young men, whereas short-term TRF (1 week) yields no performance or body composition changes.

If you are a trained athlete, try an 8-hour eating window (e.g., 1 PM to 9 PM) for at least 4 weeks while maintaining your normal training and eating enough calories. Do not expect performance changes in the first week; benefits on anaerobic power (like sprinting or HIIT capacity) tend to emerge after a month of consistent adherence.

Vegan diets are associated with lower carotid artery intima-media thickness (CIMT), an intermediate marker of atherosclerosis, compared to Western diets.

If you are concerned about early artery thickening, a vegan diet may help reduce carotid artery intima-media thickness compared to a standard Western diet. However, this is an intermediate marker and does not necessarily translate to fewer heart attacks or strokes.

A ketogenic diet (KD) improves insulin sensitivity and reduces insulin requirements in patients with type 2 diabetes and obesity by lowering glycemic response and reducing pancreatic insulin secretion.

To improve insulin sensitivity, restrict carbohydrates to under 50g per day while maintaining high fat intake (approx 75% of calories) and moderate protein (1-1.4g/kg). Expect initial side effects like fatigue or 'keto flu' due to electrolyte shifts, which typically resolve as your body adapts.