Browse the evidence

Combined therapy with interferon-alfa and ribavirin for 48 weeks is effective and cost-effective for treating mild chronic hepatitis C in patients under 65, achieving sustained virological response (SVR) rates of 33% overall and 49% for non-genotype 1.

For adults with mild chronic hepatitis C, a 48-week course of interferon-alfa and ribavirin is a clinically effective and economically viable option, particularly for those under 65 and those with non-genotype 1 strains. While the treatment causes temporary side effects and a dip in quality of life, successful clearance of the virus (SVR) leads to long-term health benefits and improved quality of life, making it a superior choice to 'watchful waiting' for this demographic.

Antiviral treatment for mild chronic hepatitis C is not cost-effective for patients aged 65 or over with genotype 1, as it leads to fewer QALYs gained.

For patients aged 65 or older with genotype 1 mild hepatitis C, antiviral treatment is generally not recommended as cost-effective because it may not improve quality-adjusted life years and costs significantly more than the threshold for value. In these cases, regular monitoring (liver biopsy) is likely the more prudent clinical strategy.

Arginine supplementation can worsen clinical outcomes in critically ill patients with severe systemic inflammatory response syndrome, sepsis, or multiple organ failure due to excessive nitric oxide production.

If you are in the ICU with sepsis or organ failure, do not self-prescribe arginine supplements. Your medical team manages your nutrition carefully because high doses can potentially worsen inflammation and cell damage in these specific critical states.

Genetic or pharmacological ablation of senescent cells extends life span and improves health span in mice by reducing age-related pathologies.

Current research indicates that clearing out aged, non-dividing cells (senolytics) can improve health and extend lifespan in animal models. While human trials are ongoing, the mechanism suggests that targeting these specific cells could help prevent age-related diseases.

Fecal Microbiota Transplantation (FMT) restores gut homeostasis and achieves higher recovery rates (90-94%) for Clostridium difficile infection (CDI) compared to standard antibiotic therapy (vancomycin, 60% recovery) by re-establishing colonization resistance via secondary bile acid production.

If you suffer from recurrent C. difficile infection, ask your doctor about Fecal Microbiota Transplantation (FMT). Clinical data shows it restores gut diversity and achieves higher recovery rates (up to 94%) compared to standard antibiotics like vancomycin (60%). It works by reintroducing healthy bacteria that produce secondary bile acids to inhibit C. difficile growth.

Using electronically captured routine data (e.g., hospital episode statistics, clinical databases) for health technology assessment via randomised controlled trials is feasible and potentially cheaper than using purpose-designed data, provided clinical symptoms and signs are collected in sufficient detail.

For researchers designing health technology assessments, consider leveraging existing electronic patient records (like hospital episode statistics) to reduce costs and speed up recruitment. However, ensure that the routine data captures detailed clinical symptoms and signs, as administrative codes alone may not suffice for judging clinical effectiveness. Validate your local data systems' capability before committing to this approach.

COPD represents an accelerated aging of the lung, characterized by shared mechanisms such as telomere shortening, cellular senescence, and impaired autophagy.

Understanding COPD as accelerated lung aging may open avenues for therapies targeting aging mechanisms (like senolytics or autophagy enhancers) in addition to standard smoking cessation and bronchodilators.

Exercise does not improve the Ankle-Brachial Index (ABI) in patients with intermittent claudication.

Do not expect your Ankle-Brachial Index (a blood pressure ratio) to change significantly with exercise. This test measures arterial blockage, which exercise does not fix. However, your ability to walk will still improve significantly despite the unchanged test score.

Genetic overexpression of the autophagy-related gene Atg5 in mice extends median lifespan by approximately 17% and promotes leanness through enhanced autophagic flux, improved insulin sensitivity, and reduced oxidative stress.

This research demonstrates that enhancing autophagy, specifically through the Atg5 pathway, can significantly extend lifespan and improve metabolic health in mice. While direct genetic manipulation is not currently an option for humans, these findings support the potential benefits of lifestyle interventions that naturally boost autophagy, such as caloric restriction or intermittent fasting, which are known to activate similar pathways. The key takeaway is that maintaining cellular cleanup mechanisms (autophagy) is crucial for longevity and metabolic efficiency.

Genetic polymorphisms in PNPLA3 (rs738409) and TM6SF2 (rs58542926) are associated with an increased risk of advanced fibrosis in NAFLD patients, independent of metabolic variables.

If you have a family history of fatty liver or known genetic variants like PNPLA3, you may be at higher risk for fibrosis. This means you should be more vigilant about managing metabolic health (weight, diabetes, blood pressure) as these factors interact with your genetics to drive progression.

Systolic blood pressure (SBP) shows no or weak correlation with national income, urbanization, or food expenditure share, remaining high in some low-income countries and variable in high-income countries.

Do not assume low blood pressure risk in low-income settings. Population-level interventions for blood pressure (e.g., salt regulation) are needed globally, regardless of economic status.

By 2030, approximately 50% of US adults are projected to be obese, and 78% will be overweight or obese, with significant disparities across racial and ethnic groups.

Prepare for a future where half of adults are obese and nearly 80% are overweight. This is not a distant threat but a current trajectory. Focus on culturally-tailored, sustainable interventions to mitigate personal risk and contribute to broader public health efforts.

Probiotic supplementation does not significantly alter the overall composition, alpha-diversity, or richness of the fecal microbiota in healthy adults compared to placebo.

If you are healthy, taking probiotics is unlikely to change your gut bacteria composition or diversity. The marketing promise of 'rebalancing' the microbiota in healthy individuals is not supported by current high-quality evidence. Focus on dietary fiber and overall diet quality for microbiota health instead.

Diet and physical activity based interventions during pregnancy do not significantly reduce the risk of composite maternal or offspring outcomes, nor individual outcomes like gestational diabetes, hypertensive disorders, or preterm delivery in IPD meta-analysis.

While lifestyle interventions may not significantly reduce the risk of all maternal and offspring complications combined, they do reduce weight gain and caesarean section risk. Focus on these proven benefits.

Increasing the training sample size of DNA methylation-based epigenetic clocks improves prediction accuracy of chronological age, which attenuates the association between age acceleration residuals (AAR) and mortality, suggesting previous associations were confounded by cellular composition.

Current 'epigenetic clocks' (like Horvath or Hannum) that claim to measure 'biological age' and predict mortality may be flawed because they are confounded by blood cell counts. Using larger, more precise datasets to build these clocks removes the mortality prediction, suggesting these clocks measure chronological time accurately but do not necessarily predict healthspan or lifespan. Do not rely on standard AAR metrics for mortality risk assessment without adjusting for cellular composition.

Telomere length is not a validated, universal biomarker of human aging because current evidence is equivocal, inconsistent across studies, and fails to predict mortality or functional decline better than chronological age.

Do not rely on telomere length testing as a definitive measure of your biological age or life expectancy. Current scientific consensus indicates the evidence is too mixed and inconsistent to be useful for individual prediction. Focus on established health markers instead.

Genomic instability and DNA damage accumulation are causative drivers of organismal aging and cellular senescence, rather than merely correlative byproducts.

Focus on maintaining genomic integrity through healthy lifestyle choices like caloric restriction, which has been shown to reduce oxidative damage and extend lifespan in models. Be skeptical of antioxidant supplements as a universal anti-aging solution, as evidence for their efficacy in healthy individuals is mixed or negative. Prioritize strategies that support DNA repair mechanisms and reduce chronic stress on cells.

Mitochondrial DNA (mtDNA) mutations cause premature aging in mice primarily through apoptosis and loss of irreplaceable cells, rather than through a vicious cycle of increased oxidative stress.

Be aware that mitochondrial DNA damage can lead to cell death (apoptosis) and tissue loss, not just oxidative stress. This suggests that maintaining mitochondrial function is important, but the mechanism might be more about preventing cell loss than just neutralizing free radicals.

Adipose tissue-derived stem cells (ASCs) are perivascular cells (pericytes) located around blood vessels, characterized by specific surface markers such as CD146+, NG2+, and alpha-smooth muscle actin (alpha-SMA+).

ASCs are not randomly scattered; they are strategically located around blood vessels. This localization is key to their function in tissue repair and regeneration.

Specific gut bacteria extend host lifespan by interacting with host nutrient signaling pathways (IIS and mTOR), and this extension is lost if these pathways are disabled.

Some gut bacteria can extend lifespan by interacting with your body's nutrient-sensing pathways (like IIS and mTOR). However, this benefit is not universal; it requires your specific host pathways to be functional. Maintaining these pathways through balanced nutrition is key to leveraging potential microbiome benefits.

Innate and adaptive immune cells (Kupffer cells, monocytes, neutrophils, T cells) are central drivers of NASH inflammation and fibrosis, with specific pathways like NLRP3 inflammasome activation and CCL2/CCR2 monocyte recruitment being critical for disease progression.

NASH involves active inflammation driven by immune cells, not just fat accumulation. Targeting immune pathways (like CCL2/CCR2 or NLRP3) is a key area of research for treating NASH.

Administration of insulin-sensitivity-associated bacteria, specifically Alistipes indistinctus, ameliorates insulin resistance and improves glucose tolerance in high-fat diet-fed mice by reducing caecal monosaccharide levels.

Specific gut bacteria, such as Alistipes indistinctus, can help break down harmful sugars in the gut, potentially improving insulin sensitivity. This suggests that targeting specific bacterial strains could be a therapeutic strategy for metabolic health.

Administration of probiotics to critically ill patients with multiorgan failure or severe immunocompromise can increase bacterial translocation and cause sepsis, making it unsafe as a standard practice.

If you are critically ill, have multiorgan failure, or are in the ICU, do not take probiotics unless explicitly prescribed by your medical team. In these cases, probiotics can cause sepsis and death. Standard practice suggests avoiding them.

Prenatal exposure to famine at the height of the famine (conception period) is associated with an increased risk of schizophrenia in the offspring.

This finding suggests that severe maternal malnutrition during the peri-conceptional period may disrupt early neurodevelopment, increasing the risk of schizophrenia. It underscores the importance of optimal nutrition before and during early pregnancy for long-term mental health.