Browse the evidence

Gut microbiota metabolize tryptophan into indole-3-propionate (IPA) and indole-3-aldehyde, which have antioxidant and anti-inflammatory properties, potentially protecting against neuronal damage and ischemia.

Your gut bacteria break down tryptophan into compounds that protect your brain from damage and inflammation. Eating a diet rich in tryptophan (found in turkey, eggs, seeds) supports this process, but the exact benefits depend on your unique gut bacteria.

Antagonism of the growth hormone secretagogue receptor (GHS-R) using specific peptide antagonists reduces food intake, decreases body weight gain, and improves glycaemic control in obese mouse models.

This research suggests that blocking the ghrelin receptor (GHS-R) can reduce food intake and body weight gain in obese individuals. While this specific study used mouse models and peptide antagonists, it supports the biological plausibility that ghrelin signaling plays a key role in obesity and that targeting this pathway could be a valid strategy for weight management and improving blood sugar control.

General obesity is associated with significantly elevated serum levels of both pro-inflammatory (IL-5, IL-12, IL-13, IFN-γ, TNF-α) and anti-inflammatory (IL-10) cytokines compared to non-obese individuals.

Obesity is linked to higher levels of various inflammatory markers in your blood, including both 'bad' (pro-inflammatory) and 'good' (anti-inflammatory) cytokines. This suggests a complex immune state rather than just simple inflammation.

Beta cell dedifferentiation, where beta cells lose their identity and insulin production capability without dying, contributes to beta cell deficit in T2D.

In T2D, some beta cells may not be dead but 'silenced' (dedifferentiated). Restoring blood glucose levels might allow them to regain function, offering a potential therapeutic target.

Pharmacological interventions targeting aging pathways (e.g., rapamycin, metformin, resveratrol) show potential to decelerate vascular aging but are limited by side effects and are not yet recommended for healthy individuals.

Do not use anti-aging drugs like rapamycin or metformin for healthy aging without medical supervision. Focus on lifestyle changes first, as they are safer and more effective. Pharmacological options are currently reserved for specific medical conditions.

Obesity reduces oocyte quality and maturity, leading to lower fertilization rates and increased miscarriage, independent of the number of follicles developed.

If you are obese, your eggs may be less mature and fertilize less efficiently, even if you produce many follicles during IVF. This increases the risk of miscarriage. Losing weight before IVF can improve egg quality and increase your chances of a successful pregnancy.

Dietary flavonoids exert anti-obesity and anti-diabetic effects by modulating multiple molecular targets, including the activation of AMPK and GLUT4 translocation to improve glucose uptake, and the inhibition of inflammatory cytokines (TNF-α, IL-6) and lipid synthesis enzymes (SREBP-1c, HMG-CoA) to reduce fat accumulation.

Incorporate flavonoid-rich foods like berries, tea, citrus fruits, and soy into your diet. These compounds may help manage blood sugar and weight by improving insulin sensitivity and reducing inflammation, though specific dosages and long-term human effects require more clinical research.

Women require less CPAP pressure than men for treating OSA of similar severity, but face challenges with adherence and appropriate screening tools.

If you are a woman using CPAP for sleep apnea, ensure your pressure settings are titrated specifically for you. Women often require lower pressures than men for the same severity of apnea. If you are experiencing discomfort or high pressure settings, discuss a re-titration with your sleep specialist.

Elafibranor (PPAR alpha/delta agonist) and Obeticholic Acid (FXR ligand) show promise in resolving NASH and improving fibrosis in clinical trials.

Elafibranor and Obeticholic Acid are emerging pharmacological treatments showing improvement in NASH and fibrosis in trials. They are not yet universally approved for NASH but are in Phase 3 testing.

Liraglutide (GLP-1 analogue) barely met the primary endpoint for NASH resolution in a small trial, while Sitagliptin showed no effect on liver histology.

GLP-1 therapies like Liraglutide show marginal benefit for NASH resolution, while others like Sitagliptin show no histological benefit. They are not primary treatments.

Specific blood lipid profiles (e.g., levels of triglycerides, lysophosphatidylcholine, and apolipoprotein E alleles) correlate with human aging and exceptional longevity.

Your blood lipid profile and ApoE genotype are markers of your biological aging and disease risk. While you cannot change your genotype, monitoring triglycerides and lysophosphatidylcholine levels may provide insights into your metabolic health. Focus on maintaining healthy lipid levels through diet and exercise.

SIRT3 polymorphisms are associated with human longevity, with specific variants being more common in centenarians.

Genetic variants in SIRT3 may play a minor role in human longevity, but evidence is inconsistent. Lifestyle interventions like calorie restriction and exercise remain the most reliable way to influence healthspan.

Calorie restriction extends lifespan and delays age-related diseases through a regulated neuroendocrine and metabolic response (involving SIR2/SIRT1 and insulin/IGF-1 signaling) rather than merely reducing the mechanical accumulation of oxidative or glycation damage.

Calorie restriction works by signaling your body to shift into a maintenance mode, not just by burning fewer calories. This involves lowering insulin and growth hormone levels, which triggers cellular repair pathways (like SIRT1). To leverage this, focus on reducing caloric intake moderately (25-60% below ad libitum) to trigger these hormonal shifts, rather than extreme fasting which may not sustain the steady-state benefits observed in studies.

Bariatric surgery (BS) induces initial weight loss through foregut exclusion-mediated hormonal upregulation of satiety hormones (GLP-1, PYY) and downregulation of ghrelin, but long-term weight regain (WR) is driven by the subsequent normalization or decline of these hormonal levels, alongside behavioral factors like dietary non-adherence and grazing.

If you had bariatric surgery and are regaining weight, recognize that your body's hormonal signals (hunger/satiety) may have changed back towards pre-surgery levels. This is a known biological mechanism, not just a personal failure. Focus on behavioral strategies (dietary counseling, monitoring) to counteract these biological drives, as hormonal interventions alone have shown mixed results.

Desacyl ghrelin induces a negative energy balance by decreasing food intake and delaying gastric emptying, acting via the hypothalamus.

This research suggests that desacyl ghrelin, often overlooked in favor of acylated ghrelin, plays a significant role in suppressing appetite and slowing digestion. While this is proven in mice, it implies that therapies targeting desacyl ghrelin pathways could potentially aid in weight management by reducing food intake and gastric emptying rates.

Higher endogenous estradiol (E2) levels are not significantly associated with the risk of metabolic syndrome in aging men, although they are associated with specific risk factors like waist circumference and triglycerides.

In aging men, higher estradiol levels do not appear to protect against metabolic syndrome, nor do they significantly increase the overall risk. However, higher E2 is linked to increased waist circumference and triglycerides. Focus on overall metabolic health through diet and exercise rather than targeting estradiol levels specifically, as the relationship is complex and not protective for the syndrome as a whole.

Low-level oxidative stress (ROS) acts as a beneficial signaling molecule that extends healthspan and lifespan, whereas the traditional view that ROS is purely damaging is an oversimplification.

Do not assume that eliminating all oxidative stress is the goal for longevity. The body requires a baseline level of reactive oxygen species (ROS) to trigger protective signaling pathways (like SIRT1 and autophagy). Extreme antioxidant supplementation may interfere with these necessary signals and potentially increase health risks. Focus on maintaining metabolic health rather than chasing zero oxidative stress.

SIRT1 activity is context-dependent and can be inhibited by chronic oxidative stress through oxidative modifications of its cysteine residues, leading to reduced autophagy and increased inflammation.

SIRT1 is not a simple 'on/off' switch for longevity. In states of chronic stress or aging, high oxidative stress can physically inhibit SIRT1 function. Therefore, strategies to support SIRT1 must also address oxidative balance. Over-reliance on SIRT1 activators without managing overall cellular stress may be ineffective.

Inhibition of ceramide synthesis improves glucose and energy metabolism by recovering insulin signaling in liver and muscle.

While direct ceramide inhibitors like myriocin show promise in research, they are not currently standard human treatments. Focus on reducing saturated fat intake to naturally lower ceramide levels.

Six-month treatment with the GLP-1 analog liraglutide prevents the decline of cerebral glucose metabolism (CMRglc) in patients with Alzheimer's disease, although it does not significantly reduce amyloid-beta deposition or improve cognitive scores.

For patients with Alzheimer's, a 6-month course of liraglutide (a GLP-1 analog) may help maintain brain glucose metabolism, which is linked to cognitive function and disease progression. However, this treatment did not reduce amyloid plaques or improve cognitive test scores in this specific study. Patients should be aware of potential gastrointestinal side effects like nausea, which are often temporary, and the need for daily injections.

RYGB surgery increases faecal GABA and glutamate, which may stimulate GLP-1 release and contribute to metabolic enhancement and weight loss.

Surgery increases gut bacteria that produce GABA, which may help stimulate hormones that reduce appetite and improve blood sugar control.

Erythrocyte Plasma Membrane Redox System (PMRS) and Ascorbate Free Radical (AFR) reductase activity increase with age as a compensatory mechanism to maintain plasma ascorbic acid levels and minimize oxidative stress.

Your body naturally tries to protect itself from oxidative stress during aging by increasing certain enzyme activities in red blood cells to recycle Vitamin C. This is an internal biological process, not something you can directly control.

Galegine, isolated from Galega officinalis, has a chemical structure similar to metformin and is responsible for the blood glucose-lowering effects of the plant extract.

Galegine is the active compound in Goat's Rue that resembles Metformin, explaining why this plant has been used historically to treat diabetes.

In female athletes engaged in sports emphasizing strength over leanness (e.g., swimming, rowing), reproductive dysfunction is characterized by hyperandrogenism (elevated DHEA-S) rather than hypoestrogenism, potentially due to adrenal axis activation or self-selection of high androgens for performance.

If you are a strength-focused athlete (swimmer, rower) experiencing menstrual irregularities, your hormonal profile may be different from endurance athletes. You may have elevated androgens (like DHEA-S) rather than low estrogen. This may be due to training effects on the adrenal glands or natural selection. Medical evaluation should distinguish between hypoestrogenism and hyperandrogenism to guide treatment.