Browse the evidence

Long-term adherence to a Mediterranean Diet is associated with longer telomere length, a marker of biological age, particularly in women and those with specific PPARγ2 gene variants.

Maintaining a Mediterranean Diet over the long term may support cellular health markers associated with aging, such as telomere length, especially for women.

Combined treatment with exenatide and metformin is superior to either drug alone for improving menstrual cyclicity, ovulation rates, and reducing central adiposity in overweight women with PCOS.

For overweight women with PCOS struggling with irregular periods, combining Metformin and Exenatide appears more effective than using either drug alone. This combination significantly improves ovulation rates and reduces abdominal fat. While Exenatide requires injections, side effects like nausea are common but manageable with dose titration. This approach targets both insulin resistance and hormonal imbalances simultaneously.

Dietary fiber interventions in humans alter gut microbiota composition and increase short-chain fatty acid (SCFA) production, but the resulting impact on metabolic regulation (insulin sensitivity, lipid profiles) is highly heterogeneous and not consistently observed across all study populations.

Increasing dietary fiber intake is likely to change your gut bacteria, but it may not automatically fix metabolic issues like insulin resistance or high cholesterol. The benefit depends heavily on the specific type of fiber (e.g., soluble vs. insoluble) and your unique gut microbiome profile. Focus on diverse, whole-food sources of fiber rather than assuming all supplements or fiber types yield the same metabolic results.

Exercise improves sleep quality indirectly by enhancing mood and reducing depressive symptoms, potentially through mechanisms involving Brain-Derived Neurotrophic Factor (BDNF) and monoamine activation.

If you struggle with sleep due to low mood or depression, exercise is a potent tool. It not only improves physical health but also normalizes neurotrophic factors like BDNF, which can alleviate depressive symptoms and indirectly restore healthy sleep patterns.

High-glycemic-index (GI) carbohydrate meals consumed 4 hours before bedtime significantly shorten sleep onset latency compared to low-GI meals.

If you struggle to fall asleep, try eating a high-glycemic carbohydrate meal (like white rice or pasta) about 4 hours before bed. This may help you fall asleep faster by increasing tryptophan availability in the brain, though individual responses vary.

Tryptophan supplementation (1 g or more) increases subjective sleepiness and decreases time to sleep in subjects with mild insomnia.

If you have mild insomnia, tryptophan supplementation of 1 gram or more may help you fall asleep faster and feel sleepier. This works by increasing serotonin levels in the brain.

GABA supplementation (300 mg/day for 4 weeks) decreases sleep latency and increases sleep efficacy in patients with insomnia.

For insomnia, GABA supplementation of 300 mg per day for 4 weeks may help you fall asleep faster and improve sleep quality. This works by leveraging GABA's role as an inhibitory neurotransmitter.

A high-monounsaturated-fat diet improves insulin sensitivity compared to a high-saturated-fat diet, but this benefit disappears if total fat intake exceeds 38% of total energy.

Choose monounsaturated fats (like olive oil, nuts) over saturated fats to improve insulin sensitivity. However, keep your total fat intake moderate (under 38% of calories). If you eat too much fat, even healthy fat, you lose this benefit.

Plant-based meat alternatives (PBMAs) generally exhibit lower energy, total fat, and saturated fat content, but higher fiber and carbohydrate content compared to animal meat, though they often contain higher sodium levels and have lower amino acid bioavailability.

When choosing plant-based meat alternatives, expect lower saturated fat and higher fiber compared to animal meat, but be mindful of potentially higher sodium levels. Note that protein quality (bioavailability) may be lower than animal meat, so variety in protein sources is important. These products are not nutritionally identical to meat.

Consumer acceptance of plant-based meat alternatives is strongly influenced by sensory similarity to meat, product familiarity, and price, with hybrid products often showing higher acceptability than pure plant-based options.

If you are trying plant-based meat alternatives, start with hybrid products (part meat, part plant) if available, as they are often more acceptable. Be aware that sensory similarity to meat is a key factor in acceptance, and pure plant-based options may not perfectly replicate meat texture or taste.

Leptin resistance in humans is debated; some studies suggest low-dose leptin can normalize appetite in weight-reduced obese patients, implying that physiological leptin signaling may still function if the system is resensitized after weight loss.

Weight loss can 'reset' your leptin sensitivity. Even if you were resistant before, losing weight may allow your body to respond better to hormonal signals, making it easier to maintain the new weight.

Plant-based diets (vegetarian or vegan) do not provide advantages for strength, anaerobic, or aerobic exercise performance compared to omnivorous diets, though they are viable for supporting athletic performance.

You do not need to eat meat to perform at a high level. Current research indicates that vegetarian and vegan diets support strength, anaerobic, and aerobic performance equally well to omnivorous diets, provided you consume enough total protein and variety. Focus on getting adequate calories and protein from diverse plant sources to match your training demands.

Vegetarians may have lower muscle creatine and carnosine levels, but this does not negatively impact performance; however, vegetarians may respond more robustly to creatine supplementation.

If you are vegetarian, your muscle creatine levels may be lower, but this doesn't hurt your performance. You might actually benefit more from creatine supplementation than meat-eaters, so consider it if you do high-intensity training.

Oral supplementation with Nicotinamide Riboside (NR) at a dose of 1000 mg twice daily significantly increases whole-blood NAD+ levels in healthy adults.

Take 1000 mg of Nicotinamide Riboside (NR) twice daily. This dose has been shown to double whole-blood NAD+ levels in healthy adults without causing the side effects (like flushing) associated with other Vitamin B3 supplements. The study used an 8-day escalation protocol, but maintenance at 1000 mg BID is the effective dose for increasing NAD+.

Environmental factors (physical, social, and policy) significantly influence nutrition and physical activity behaviors, but their impact is often weaker than or interacts with individual-level determinants such as motivation and self-efficacy.

To improve nutrition and physical activity, focus on modifying the environment (e.g., access to parks, healthy food availability, safety) alongside individual education. Recognize that environmental changes can support those with lower self-efficacy, but personal factors remain strong predictors of behavior.

A proprietary white bean alpha-amylase inhibitor (Phase 2) causes significant weight loss and reduces post-prandial blood glucose spikes by inhibiting starch digestion.

Take 500-1000mg of white bean extract (Phase 2) 15-30 minutes before meals containing carbohydrates. This blocks the enzyme that breaks down starch, leading to less calorie absorption and lower blood sugar spikes. It works best if you eat a moderate-to-high carb diet.

White bean alpha-amylase inhibitor reduces post-prandial blood glucose spikes in a dose-dependent manner.

If you eat high-carb meals, taking 1500-3000mg of white bean extract before the meal can significantly blunt the resulting blood sugar spike. Start with a lower dose to assess tolerance.

Higher consumption of fruit and vegetables (5+ portions/day) is associated with a lower risk of incident pre-frailty or frailty in older adults.

Aim for 5 or more portions of fruit and vegetables daily. This specific intake level is linked to a large reduction in frailty risk. If fresh produce is costly, consider frozen or canned options which retain nutritional value.

High consumption of ultra-processed foods (UPFs) is associated with a three-fold increased risk of incident frailty in older adults.

Limit your intake of ultra-processed foods, such as packaged snacks, sugary drinks, and processed meats. High consumption is linked to a three-fold increased risk of frailty. Focus on minimally processed foods.

Faster eating rates are positively associated with higher current BMI and greater long-term BMI gain, independent of total daily energy intake.

If you tend to eat quickly, try to slow down your meals. This study suggests that faster eating is linked to higher body weight, even if you don't eat more calories. Slowing down might help your body register fullness better, potentially aiding in weight management.

Sedentary lifestyle is a major contributor to the high prevalence of obesity and diabetes in Egypt, particularly among urban populations.

Urban living, especially for high-SES individuals, is associated with high sedentary behavior. This is due to structural factors like high-rise living without elevators and cultural barriers to women's sports participation. To improve health, incorporate more daily movement into your routine, such as taking stairs when possible or engaging in home-based exercises.

Very Low Carbohydrate Ketogenic Diets (VLCKD) alter gut microbiota composition by generally decreasing alpha diversity and richness, while selectively increasing beneficial bacteria such as Akkermansia muciniphila and Lactobacillus, which may contribute to metabolic and neurological benefits.

If you start a ketogenic diet, expect your gut bacteria to change. You might see a drop in overall variety, but this often comes with an increase in beneficial bacteria like Akkermansia and Lactobacillus. This shift is linked to the diet's benefits for seizures and metabolism. If you have specific gut issues, monitor your response, as individual results vary.

Physiologic levels of nitric oxide (NO) enhance insulin sensitivity and glucose uptake in skeletal muscle by improving microvascular perfusion and directly blocking inhibitory interactions with insulin signaling pathways.

Maintaining healthy nitric oxide levels through exercise (which increases shear stress and NO production) supports insulin sensitivity. This happens by improving blood flow to muscles and directly enhancing the cellular signaling of insulin, helping your body manage blood sugar and energy more efficiently.

Exercise type (aerobic vs. resistance) does not significantly alter clinical outcomes in PCOS, provided intensity is moderate.

You do not need to force yourself to do a specific type of exercise if you dislike it. Whether you prefer walking, cycling, or weightlifting, moderate intensity exercise will yield similar benefits for your PCOS symptoms. Choose the activity you can sustain.