Browse the evidence

Sibutramine (10-30 mg/day) significantly reduces daily energy and macronutrient intake in non-dieting women with obesity, primarily by reducing lunch and dinner consumption without affecting breakfast.

For women with obesity who are not actively dieting, taking Sibutramine (10-30mg) leads to a significant, automatic reduction in daily calorie intake, specifically at lunch and dinner, without requiring conscious effort to restrict food. This suggests the drug alters satiety signals or food selection behaviors rather than just willpower.

Aerobic exercise is required to reduce visceral adipose tissue (VAT) in postmenopausal women with type 2 diabetes, as a hypocaloric high monounsaturated fat diet alone fails to reduce this specific fat depot despite reducing total abdominal and subcutaneous fat.

If you have type 2 diabetes and are postmenopausal, simply cutting calories may not be enough to shrink your dangerous visceral belly fat. You must incorporate aerobic exercise (like brisk walking) at moderate intensity (65-70% of your max heart rate) for about 50 minutes, three times a week. This specific type of activity is required to target visceral fat, which is strongly linked to insulin resistance, even if your total body weight doesn't change drastically.

Women may experience a complete resolution of adaptive thermogenesis once weight stability is achieved, whereas men may retain a lower-than-predicted REE even after weight stabilization.

After you stop dieting and maintain your new weight, your metabolism might recover fully, especially for women. Men might continue to burn slightly less energy than predicted for their size even after stabilization, potentially making weight maintenance harder for them long-term.

Among individuals with overweight or obesity who achieve initial weight loss (≥5%) in the first year, long-term maintenance of that weight loss (years 6-15) is significantly greater for those assigned to metformin compared to those assigned to intensive lifestyle intervention (ILS).

If you have prediabetes or are at high risk, achieving even a modest 5% weight loss in the first year is a strong predictor of long-term success. For those who achieve this, adding metformin (if prescribed) may help you keep the weight off better than lifestyle changes alone over the long haul (10+ years). It acts as a maintenance aid rather than just an initial weight loss tool.

Reducing the intake of specific amino acids, particularly leucine and histidine, which are abundant in animal proteins, is associated with decreased fat mass and improved insulin resistance independent of total caloric intake.

Focus on the source of your protein. Plant proteins are naturally lower in leucine and histidine compared to animal proteins. This specific amino acid profile may help improve insulin sensitivity and reduce fat mass, even if total protein intake is adequate.

Achieving and maintaining diabetes remission (HbA1c <48 mmol/mol off glucose-lowering medications) is associated with a significantly lower incidence of Major Adverse Diabetic Events (MADE) compared to those not in remission.

Achieving diabetes remission is not just about feeling better; it actively protects your kidneys, eyes, and nerves from long-term damage. By maintaining remission through weight loss and lifestyle changes, you significantly lower your risk of serious diabetic complications.

Hypocaloric diets reduce the secretion of leptin, TNF-alpha, IL-6, and IL-8 from adipose tissue, but do not alter the secretion of adiponectin or PAI-1, regardless of whether the diet is low-fat/high-carbohydrate or moderate-fat/moderate-carbohydrate.

If you are obese and lose weight through a caloric deficit, your body will likely reduce the secretion of leptin and inflammatory cytokines (TNF-alpha, IL-6, IL-8) from fat tissue. However, do not expect your adiponectin or PAI-1 secretion from fat tissue to change with moderate weight loss. The specific type of diet (low-fat vs. moderate-fat) matters less than the total calorie reduction for these specific markers.

Newer GLP-1 receptor agonists (semaglutide) and dual agonists (tirzepatide) significantly outperform older medications and lifestyle interventions alone, achieving weight losses of 12-17%.

Newer injectable medications like semaglutide (2.4mg weekly) and tirzepatide are significantly more effective than older drugs, achieving 12-17% weight loss. They represent a major step forward in pharmacotherapy for obesity.

A ketogenic diet significantly reduces HbA1c levels in overweight T2DM patients, though it does not significantly affect fasting glucose, fasting insulin, or HOMA-IR compared to control diets.

While a ketogenic diet effectively lowers long-term average blood sugar (HbA1c) in T2DM patients, it may not immediately change fasting blood glucose or insulin resistance scores (HOMA-IR) compared to other diets. This suggests the benefit is in sustained glucose regulation rather than acute fasting metrics.

Combining caloric restriction with physical activity significantly improves endothelium-dependent vasodilation in obese subjects, primarily by reducing insulin resistance and oxidative stress.

To improve blood vessel health in obesity, combine a moderate caloric deficit (600-800 kcal/day) with regular walking (30+ minutes, 3+ times a week) for 10-16 weeks. This dual approach improves insulin sensitivity and reduces oxidative stress, leading to better blood flow than weight loss alone.

Intermittent fasting (IF) regimens produce weight loss results statistically similar to traditional Caloric Energy Restriction (CER).

You can achieve the same amount of weight loss with intermittent fasting as you can with standard calorie counting. Choose the method that you can stick to long-term.

Adherence to intermittent fasting regimens is generally high (>80%) in short-term studies (≤3 months) but drops significantly in long-term studies (>3 months).

Intermittent fasting is easy to stick to for the first 3 months, but adherence drops significantly thereafter. If you plan to fast long-term, expect a drop in adherence and consider modified approaches (like MADF) to sustain it.

Physical activity is significantly more effective for maintaining weight loss after achievement than for producing initial weight loss.

Use diet to lose the weight and use exercise to keep it off. While exercise has health benefits, it is less effective than dietary changes for initial weight loss. Focus on creating a caloric deficit through food first, then use moderate activity (like 1 hour of brisk walking daily) to maintain your new weight.

A 6-week very-low-calorie diet (VLCD) significantly reduces hepatic free fatty acid (FFA) uptake and endogenous glucose production, thereby improving hepatic insulin sensitivity and fractional insulin extraction in obese individuals.

If you have significant liver fat and insulin resistance, a short-term (6-week) very-low-calorie diet (around 550 kcal/day) can rapidly reduce liver fat and improve how your liver handles insulin. This is achieved by reducing the amount of fatty acids your liver takes up. This intervention is intense and should be medically supervised, but it offers a faster metabolic reset than gradual weight loss alone.

Genetic variants in GLP1R (rs6923761) and TCF7L2 (rs7903146) influence the response to liraglutide, with specific genotypes associated with greater reductions in body fat and weight.

If you are taking liraglutide, your genetic makeup might influence how much fat or weight you lose. Some genetic variants are linked to better outcomes with this drug. This is not a reason to start or stop treatment, but may help explain individual differences in response.

Meal replacement diets significantly reduce oxidative stress (measured by urine lipid peroxides) during weight maintenance compared to food-based diets, independent of the magnitude of weight loss.

If you are concerned about long-term health markers like oxidative stress, a structured meal replacement diet may offer additional benefits beyond just weight loss, specifically in reducing oxidative stress markers during the maintenance phase.

Weekend lifestyle patterns, specifically higher dietary intake and lower physical activity, cause weight gain or cessation of weight loss, thereby hindering long-term weight management efforts.

To lose weight effectively, you must maintain your weekday dietary and activity habits on weekends. The study shows that even small daily caloric surpluses on Saturdays and Sundays can completely halt weight loss or cause weight gain, negating the deficit created during the rest of the week. Treat weekends as part of the intervention, not a break from it.

A ketogenic very-low-energy diet (VLED) induces a transient increase in subjective hunger and desire to eat during the first 3 weeks (up to 5% weight loss), despite the presence of ketosis, with appetite suppression only emerging after 10% weight loss.

If you start a ketogenic very-low-energy diet, expect your hunger to increase significantly during the first 3 weeks, even if you are in ketosis. This is a normal, transient phase. Do not mistake this hunger for the diet not working; appetite suppression typically emerges only after you have lost about 10% of your body weight. Preparing for this initial hunger spike can help you stick with the diet.

Upon refeeding (cessation of ketosis) after significant weight loss (10-17%) on a ketogenic diet, hunger feelings and active ghrelin (AG) concentrations increase significantly, potentially undermining long-term weight maintenance.

When you stop the ketogenic diet and return to normal eating, expect your hunger and ghrelin levels to rise significantly. This is a physiological response to losing ketosis and weight. To mitigate this, transition gradually to your maintenance diet rather than stopping abruptly, and be aware that your body will signal for more food.

Consuming 2.56 mg of capsaicin with every meal during a negative energy balance prevents the typical reduction in resting energy expenditure and diet-induced thermogenesis, thereby supporting fat oxidation without increasing blood pressure.

If you are dieting, adding a specific amount of capsaicin (approx. 2.56 mg per meal, found in about 1 gram of red chili pepper) to your meals may help maintain your metabolic rate and burn more fat, without raising your blood pressure. This strategy works best if you are already used to eating spicy foods and are in a caloric deficit.

In obese men with metabolic syndrome, short-term weight loss via a hypocaloric low-fat diet increases LDL apoB-100 catabolism, thereby lowering plasma LDL cholesterol concentrations.

For men with metabolic syndrome, losing weight through a calorie-restricted, low-fat diet improves heart health by speeding up how your body clears LDL cholesterol from your blood. While this might not raise your HDL numbers, the reduction in LDL is a significant benefit for cardiovascular risk.

Internet-based interventions can significantly reduce depressive symptoms and diabetes-specific emotional distress in adults with type 1 and type 2 diabetes.

If you have diabetes and are struggling with depression, consider using a guided internet-based self-help program. These programs can be effective in reducing depressive symptoms and emotional distress, and they offer a private way to get help.

Low-carbohydrate diets do not provide superior long-term weight loss compared to low-fat or Mediterranean diets when total energy intake is matched.

You don't need to follow a specific low-carb diet to lose weight long-term. Whether you choose low-carb, low-fat, or Mediterranean, the key is restricting total calories. Low-carb might help you lose weight faster in the first 6 months, but after a year, it's no better than other diets if you eat the same number of calories.

During the early phase (Phase I) of voluntary weight loss (first 4-6 weeks), the majority of weight loss consists of fat-free mass (protein, glycogen, and associated water/electrolytes) rather than fat mass, with the fraction of fat-free mass loss being highest in the first week and decreasing over time.

Expect the first 4-6 weeks of dieting to show rapid weight loss that is mostly water and lean tissue, not just fat. This is normal physiology, not a sign that your diet is 'too harsh' or that you are losing muscle dangerously (unless protein intake is extremely low). Focus on preserving muscle through adequate protein and resistance training, and do not be discouraged when the scale slows down after the first month; this indicates you are entering the more fat-dominant Phase II.