Browse the evidence

Suboptimal diet is the leading risk factor for cardiometabolic disease mortality in the Middle East and North Africa, accounting for 48% to 72% of deaths depending on the country.

In the MENA region, fixing diet is the single most effective way to prevent heart disease and diabetes deaths. Focus on increasing fruits and whole grains while reducing sodium, as these specific dietary failures contribute more to mortality than blood pressure or BMI alone in most countries.

Low intake of fruits and whole grains are the two most significant individual dietary risk factors for cardiometabolic mortality in the MENA region, accounting for 12% and 11% of deaths respectively.

To significantly reduce heart disease and diabetes risk in the MENA region, prioritize increasing daily consumption of fruits and whole grains. These two specific food groups are responsible for the largest share of preventable deaths among all dietary factors.

Time-restricted feeding (TRF) with early or midday timing improves insulin sensitivity and cardiometabolic health markers more effectively than late TRF, independent of caloric restriction.

If you practice Time-Restricted Feeding, try to eat your meals earlier in the day (e.g., 8 AM to 2 PM or 10 AM to 6 PM). This timing aligns with your body's natural circadian rhythm and has been shown to improve insulin sensitivity and blood pressure more effectively than eating the same calories later in the evening. You do not need to restrict calories strictly; simply shifting your eating window earlier can yield metabolic benefits.

Intermittent Fasting (IF) regimens (5:2, ADF, ADMF, TRF) produce weight loss comparable to daily caloric restriction (CR), but may offer superior insulin-sensitizing benefits independent of weight loss.

If you are choosing between Intermittent Fasting and daily calorie restriction for weight loss, know that both methods are equally effective for losing weight. However, IF may offer extra benefits for your metabolic health, such as better insulin sensitivity, which might be important if you have prediabetes or metabolic syndrome. Choose the method you can sustain long-term.

High body mass index (BMI) is a strong independent risk factor for the development and progression of chronic kidney disease (CKD), primarily driven by compensatory glomerular hyperfiltration and increased intraglomerular pressure.

Maintaining a healthy weight is one of the most effective ways to protect your kidneys. Excess body weight forces your kidneys to work harder (hyperfiltration), which can cause long-term damage. Focus on sustainable lifestyle changes like balanced nutrition and regular physical activity to manage weight, especially if you have a family history of kidney issues or high blood pressure.

Obesity increases the risk of kidney stones (nephrolithiasis) and kidney cancer through mechanisms involving insulin resistance, acidic urine, and adipose-derived inflammatory factors.

If you are overweight, you are at higher risk for kidney stones and kidney cancer. This is partly due to how your body processes acids and minerals. Staying well-hydrated and maintaining a healthy weight through balanced eating can help reduce these risks. Be cautious with extreme weight loss methods, as they can sometimes increase stone risk.

High baseline cardiorespiratory fitness (CRF) is independently associated with a significantly lower risk of incident heart failure (HF), particularly heart failure with preserved ejection fraction (HFpEF), in adults with type 2 diabetes.

For adults with type 2 diabetes, prioritizing cardiorespiratory fitness (CRF) is more critical for preventing heart failure than focusing solely on weight loss. Aim to improve your aerobic capacity through regular physical activity, as higher fitness levels are strongly linked to a reduced risk of heart failure, particularly the preserved ejection fraction subtype.

Resistance exercise-induced skeletal muscle hypertrophy is primarily regulated by internal biological variables (e.g., mechanotransduction, mTORC1 signaling, ribosomal biogenesis) rather than external programming alone, with internal variables acting as the dominant determinant of the hypertrophic response.

To maximize muscle growth, focus on consistent resistance training that provides mechanical load. Your body's internal biological machinery (signaling pathways, gene expression) will determine how much muscle you build from that load. Don't chase acute hormone spikes or muscle soreness, as these are not the primary drivers of long-term hypertrophy.

Produce prescription programs significantly reduce household food insecurity and improve self-reported health status in both adults and children.

If you are experiencing food insecurity, ask your healthcare provider about produce prescription programs. These programs can provide financial support for buying fruits and vegetables, which may help improve your overall health and reduce stress related to food access.

Young adults maintain weight loss for a significantly shorter duration than older adults, despite achieving similar initial weight loss amounts.

Be aware that as a young adult, you may struggle to maintain weight loss as long as older adults. To counter this, build strong social support systems and use appearance-based goals to sustain motivation, as these are your strongest levers for adherence.

Two weeks of acute physical inactivity (step count <1,000/day) causes a significant decline in glycemic control and integrated muscle protein synthesis in overweight, prediabetic older adults, and these metabolic impairments fail to recover after two weeks of returning to habitual activity levels.

If you are an older adult with prediabetes, even a short period of reduced activity (fewer than 1,000 steps a day) can worsen your blood sugar control and muscle building processes. Crucially, simply going back to your normal activity level for two weeks may not be enough to fix these issues. You may need to be more proactive, such as engaging in specific exercise or medical management, to prevent these declines and help your body recover faster after periods of inactivity.

Six months of caloric restriction combined with aerobic exercise significantly improves autonomic nervous system balance (decreased sympathetic, increased parasympathetic activity) in overweight individuals, whereas caloric restriction alone does not achieve statistical significance.

If you are overweight and want to improve your heart's stress regulation (autonomic balance), combining a moderate calorie reduction with regular aerobic exercise is more effective than dieting alone. Aim for a combined 25% energy deficit, split between what you eat and how much you move, sustained over six months.

Massive weight loss induces significant metabolic adaptation (reduced resting metabolic rate beyond what is predicted by body composition changes) that is strongly correlated with the degree of energy imbalance, rate of weight loss, and changes in circulating leptin levels.

After losing a large amount of weight, your body will biologically resist keeping it off by slowing your metabolism and altering hunger hormones (leptin). This is not a failure of willpower but a strong physiological adaptation. Expecting to maintain massive weight loss requires acknowledging this metabolic defense and likely ongoing, structured energy management.

Performing resistance exercise immediately after endurance exercise enhances Akt phosphorylation (a key anabolic signaling pathway) compared to performing resistance exercise alone, whereas performing endurance exercise after resistance exercise does not augment this response.

If you combine cardio and weights in one session, the order changes your body's molecular signals. Doing resistance training after cardio may actually boost Akt signaling (a growth pathway) more than doing resistance alone. However, this doesn't mean all growth pathways are boosted; other markers like mTOR targets showed different patterns. Don't stress about order for every goal, but be aware that 'interference' is complex and order-dependent.

Performing resistance exercise before endurance exercise exacerbates the transcriptional response of muscle atrophy genes (MuRF) compared to performing endurance exercise before resistance.

If you do resistance training before cardio, your body may upregulate genes associated with muscle breakdown (MuRF) more than if you do cardio first. This suggests that 'weights first' might have a catabolic cost in terms of specific gene expression, even if it boosts growth signals like Akt. Balance your training to manage these competing signals.

Higher consumption of whole fat dairy (at least two servings per day) is associated with a lower prevalence of metabolic syndrome and a lower incidence of hypertension and diabetes compared to zero intake.

If you consume dairy, choosing whole fat options (like whole milk, full-fat yogurt, or cheese) and consuming at least two servings daily is associated with a lower risk of developing metabolic syndrome, high blood pressure, and type 2 diabetes compared to not consuming dairy or consuming only low fat dairy. This association holds across diverse global populations, suggesting that the fat content in dairy may not be detrimental and might even be beneficial for metabolic health when compared to low fat alternatives.

Residing in less walkable neighborhoods is associated with a higher predicted 10-year cardiovascular disease risk compared to residing in highly walkable neighborhoods.

If you live in an area with few shops, poor street connectivity, or low density, your risk for heart disease is higher, even if you try to exercise. To counter this, prioritize utilitarian walking (walking to stores, transit) where possible, and be mindful that your environment is working against you. Seek out walkable pockets or plan active commutes to mitigate the structural disadvantage.

Concurrent resistance and aerobic exercise (CE) stimulates both myofibrillar and mitochondrial protein synthesis rates in sedentary middle-aged men without causing molecular interference compared to isolated resistance or aerobic exercise.

If you are sedentary and middle-aged, you can combine resistance and aerobic exercise in the same workout session without worrying that the cardio will negate the muscle-building benefits of the weights. This study shows that doing both together stimulates muscle protein synthesis just as effectively as doing weights alone, and mitochondrial synthesis just as effectively as doing cardio alone. You do not need to split these activities into separate days to see acute benefits.

Aging causes 'anabolic resistance,' characterized by a blunted muscle protein synthesis response to feeding, which contributes to sarcopenia.

As you age, your body becomes less efficient at turning food into muscle (anabolic resistance). To combat this, you likely need to consume slightly more protein per meal or ensure you are doing resistance exercise to 'wake up' the muscle's synthetic machinery.

Leucine is a critical amino acid that can stimulate muscle protein synthesis, but complete essential amino acids are required for sustained MPS.

While leucine is a key trigger for muscle building, you still need to eat complete proteins containing all essential amino acids. Leucine alone is not enough to sustain muscle growth.

In uncomplicated human disuse states (bed rest, immobilization), the dominant mechanism driving muscle atrophy is a significant reduction in muscle protein synthesis (MPS), not an increase in muscle protein breakdown (MPB).

If you are immobilized or inactive, your muscles shrink primarily because protein synthesis drops by about 50%, not because breakdown increases. To prevent this, you must actively stimulate muscle protein synthesis through low-volume resistance exercise or amino acid/protein intake, as the body's natural response to inactivity is to shut down muscle building.

Short-term exposure (1-3 days) to a high-fat, low-CHO diet impairs endurance performance by depleting glycogen without sufficiently increasing fat oxidation capacity to compensate.

Avoid high-fat, low-carb diets for 1-3 days before an endurance event. This will lower your glycogen stores and reduce your ability to oxidize carbohydrates, leading to worse performance without providing enough fat-burning benefits to compensate.

Intensive lifestyle modification (including meal replacements and frequent counseling) combined with semaglutide does not produce significantly greater long-term weight loss than semaglutide alone with brief counseling, suggesting the medication's efficacy may render intensive behavioral interventions redundant for long-term outcomes.

When taking semaglutide, intensive lifestyle programs (like meal replacements and frequent counseling) do not significantly improve long-term weight loss compared to brief counseling. The medication's effect is so strong that it largely overrides the need for intensive behavioral strategies for weight loss, though lifestyle changes remain important for health.

Incretin-mimetic drugs (IMDs) such as semaglutide and tirzepatide cause significant skeletal muscle mass loss (≥10%) during rapid weight reduction, a loss comparable to 20 years of age-related decline.

If you are taking GLP-1 or GIP/GLP-1 drugs, expect to lose muscle along with fat. This is not just 'water weight'; it is functional tissue. To mitigate this, you must prioritize protein intake and engage in resistance training, as these are the only proven strategies to preserve muscle during rapid weight loss.