A new study found that men with nonmetastatic prostate cancer who replaced saturated and animal fats with unsaturated and plant-based fats had a lower risk of death. Replacing about 10% of daily calories from animal fat with plant-based fat was associated with a 16% lower rate of death.
A new study reveals that despite a decline in national lead levels, children of color and from low-wealth families continue to face higher exposure risks due to increased lead in old homes and cultural products. The authors call for policy solutions to eliminate all sources of lead and provide targeted interventions to reduce disparities.
The poll found that trust in CDC health recommendations declined from 77% in spring 2025 to 50% in the last year, with deep partisan divides and demographic groups affected. Trust in state and local public health agencies also fell, but not as dramatically, with state and local health departments being more trusted than federal agencies.
A study by Harvard T.H. Chan School of Public Health found that gut microbiome alterations persist even after adenoma removal, increasing the risk of colorectal cancer. The researchers discovered that diet and physical activity were closely tied to CRC-associated gut microbes, suggesting lifestyle habits may contribute to sustained risk.
A new study by Harvard T.H. Chan School of Public Health found that Anopheles darlingi mosquitoes are evolving to evade insecticides, threatening malaria control efforts in South America. The study sequenced complete genomes of over 1,000 mosquitoes across six countries and identified resistance-related genes.
A new study by Harvard T.H. Chan School of Public Health and the Department of Veterans Affairs Boston Healthcare System found that using GLP-1 receptor agonists in combination with adhering to healthy lifestyle habits significantly reduces cardiovascular risk among individuals with type 2 diabetes. The study showed that these two stra...
A new study by Harvard T.H. Chan School of Public Health found that US counties near operational nuclear power plants have higher rates of cancer mortality than those farther away. The researchers estimated around 115,000 cancer deaths in the US over the study period attributed to NPP proximity.
A meta-analysis of longitudinal studies found that broad spiritual practices, such as attending religious services and meditation, were associated with a 13% reduced risk of hazardous drug and alcohol use. This reduction was greater (18%) among individuals attending religious services at least once per week.
A new study finds that the quality of macronutrients matters more than their quantity for heart health, with diets rich in whole grains, fruits, and vegetables associated with a lower risk of coronary heart disease. The study also found improved cardiovascular biomarkers in healthy versions of low-carb and low-fat diets.
A new study found that real estate investment trust (REIT)-acquired U.S. hospitals were more likely to close or go bankrupt compared to non-REIT-acquired hospitals. Despite no impact on quality of care, REIT acquisition led to significant financial strain.
A study from Harvard T.H. Chan School of Public Health found that school reopenings significantly reduced mental health diagnoses among children, including anxiety and depression, by 43% compared to periods before schools reopened. The benefits were especially pronounced among girls.
Researchers have discovered a new way to understand cancer and its vulnerabilities by targeting FSP1, a protein that helps cancer cells survive. The study found that FSP1 inhibitors can effectively reduce the growth of metastatic melanoma cells in lymph nodes.
A new Harvard study found that US stillbirth rates are higher than previously reported, with many cases having no identified clinical risk factor. The study highlights the need for improved stillbirth risk prediction and prevention efforts.
A new study found that three in five US children enrolled in Medicaid or the Children's Health Insurance Program (CHIP) by age 18. The researchers used a microsimulation model to track childhood insurance coverage over 18 years, estimating cumulative insurance outcomes under policy conditions similar to those between 2015 and 2019.
A study led by Harvard T.H. Chan School of Public Health found that long-term exposure to fine particulate air pollution (PM2.5) from metals like nickel and vanadium, and sulfate particles, is strongly linked to asthma hospitalizations. The researchers identified these compounds as the most harmful components in the PM2.5 mixture.
A Mediterranean-style diet, along with reduced caloric intake and moderate physical activity, has been shown to lower the risk of type 2 diabetes by 31%. The study found that participants in the intervention group lost an average of 3.3 kilograms and reduced their waist circumference by 3.6 centimeters.
Women who experienced stalking and/or obtaining a restraining order had a significantly higher risk of developing cardiovascular disease, according to a new study. The study found a 41% increase in CVD risk among women who experienced stalking and a 70% increase among those with restraining order history.
A new study found that consuming three servings of French fries weekly increased the risk of developing type 2 diabetes by 20%. In contrast, baked, boiled, or mashed potatoes were not significantly associated with T2D risk. Swapping any form of potato for whole grains may lower the risk of T2D, with a 4% reduction in risk estimated.
A new study led by Harvard T.H. Chan School of Public Health found that increasing solar power generation in the US by 15% could lead to significant cuts in CO2 emissions. The researchers pinpointed regions where clean energy investments return the greatest climate dividends and demonstrated the value of coordinated clean energy efforts.
A study found that children who lived near Coldwater Creek, a Missouri River tributary polluted by nuclear waste, had a higher risk of developing cancer. The researchers estimated that those living less than one kilometer away from the creek had a 44% higher risk of cancer compared to those living more than 20 kilometers away.
A new study led by Harvard T.H. Chan School of Public Health researchers found that fire smoke exposure can alter the immune system on a cellular level, even in healthy individuals. Exposure to particulate matter, gases, and other compounds in fire smoke was linked to changes in immune cells, inflammation, and gene expression.
A new poll by Harvard T.H. Chan School of Public Health and the de Beaumont Foundation found that most U.S. adults (79%) support routine childhood vaccine requirements to attend school, including a majority across party lines. The vast majority of parents and adults believe vaccines are safe for most children.
A new study found that nearly one-third of individuals adopting healthy diets didn't lose weight but still experienced significant improvements in cardiometabolic markers, including increased HDL cholesterol and reduced visceral fat. The research suggests a healthy diet can have benefits beyond weight loss.
A potent combination of antimalarial compounds blocks parasite transmission in mosquitoes while circumventing insecticide resistance. The new strategy retains activity even after a year and efficiently kills parasites even when applied to the female mosquito up to four days in advance of infection.
A new poll by Harvard T.H. Chan School of Public Health and the de Beaumont Foundation finds that many Americans anticipate losing trust in public health recommendations with changes in health agency leadership. Despite stark divisions, there is bipartisan support for several key health priorities.
A new study found that exposure to fine particulate air pollution from wildfire smoke was associated with increased visits to emergency departments for mental health conditions. The study suggests that wildfire smoke may play a direct role in worsening mental health conditions like depression, anxiety, and mood disorders.
A study of over 105,000 individuals found that following a healthy diet rich in plant-based foods and moderate animal-based foods can promote overall healthy aging. The Alternative Healthy Eating Index (AHEI) was the leading dietary pattern, emphasizing fruits, vegetables, whole grains, and healthy fats.
A national poll found that three-fourths of employees with chronic conditions need to manage their health during work hours, but a majority have not told their employer. The poll highlights challenges such as missed opportunities and stigma, as well as difficulties in caring for family members with chronic conditions.
A comprehensive map of Plasmodium knowlesi genes essential for blood infections has been generated, providing insights into drug resistance and informing the development of new therapeutics. The study identified molecular requirements for parasite growth and pinpointed specific genes causing resistance to current antimalarials.
A new study from Harvard T.H. Chan School of Public Health and colleagues reveals that less than 0.1% of privately insured US adolescents receive puberty blockers or gender-affirming hormones. No TGD patients under age 12 were prescribed hormone treatment, indicating low access to care among this population.
A new study from Harvard T.H. Chan School of Public Health found that consuming at least five ounces of dark chocolate per week may lower the risk of developing type 2 diabetes by up to 21%. Dark chocolate's rich polyphenols are believed to offset the negative effects of saturated fat and sugar on weight gain and diabetes.
A higher ratio of plant-based protein to animal-based protein may significantly lower the risk of cardiovascular disease and coronary heart disease. Consuming more plant protein overall, combined with a higher plant-to-animal protein ratio, provides the most heart health benefits.
A new study finds that fine particulate air pollution (PM2.5) exposure is associated with altered immune responses and increased inflammation in pregnant women, leading to adverse birth outcomes. The study highlights the importance of minimizing air pollution exposure in pregnant women to protect maternal and fetal health.
A new study by Harvard T.H. Chan School of Public Health suggests that the federal government may be paying for veteran healthcare twice due to high-veteran Medicare Advantage plans. The research found that nearly one in five veterans enrolled in these plans did not incur any Medicare services, highlighting concerns about inefficient s...
A new study by Harvard researchers found that food insufficiency increased after pandemic-era SNAP emergency allotments expired, leading to greater use of food pantries and difficulty paying household expenses. Black SNAP participants reported higher anxiety symptoms than white participants.
A panel of experts recommends 36 nutrition competencies for US medical students and physician trainees to improve patient health outcomes and address diet-related diseases. The proposed competencies cover six categories, including foundational knowledge, assessment and diagnosis, and collaborative support.
A new study from Harvard T.H. Chan School of Public Health found that higher exposure to fine particulate air pollution (PM2.5) during infancy is associated with lower economic earnings in adulthood. The association was strongest in the Midwest and South, where an increase in PM2.5 exposure by one microgram per cubic meter was linked t...
A new study found significant intake inadequacies for nearly all evaluated micronutrients, with iodine and vitamin E deficiencies being the most prevalent. The researchers estimated inadequate intakes were higher for women than men in some countries, highlighting a need for targeted dietary interventions.
A new study found a significant association between higher heme iron intake and type 2 diabetes risk. Participants with the highest heme iron intake had a 26% higher risk of developing T2D than those in the lowest intake group. The researchers also identified key metabolic biomarkers associated with this increased risk.
A recent study found that nearly half of those who lost Medicaid coverage during the Medicaid unwinding process were left uninsured by late 2023. The researchers also discovered that individuals who had been disenrolled reported significantly worse access to healthcare, including more cost-related delays in care and less affordability.
A new study by Harvard T.H. Chan School of Public Health found that chronic loneliness may significantly raise the risk of stroke among older adults. The research suggests that loneliness, experienced chronically, plays an important role in stroke incidence and is associated with a higher risk of long-term disability and mortality.
A majority of Americans say four key pandemic policies were 'generally a good idea' in retrospect, including mask requirements, healthcare worker vaccination, indoor dining closures, and K-12 school closures. Views on these policies vary across subgroups, with Democrats and urban residents more likely to support them.
A new study published in The American Journal of Clinical Nutrition found that adherence to the Planetary Health Diet was associated with a 30% lower risk of premature death and significant reductions in greenhouse gas emissions. The diet emphasizes minimally processed plant foods and modest consumption of meat and dairy foods.
A new study found that average age at menarche has decreased by nearly a year over the past five decades, especially among Black, Hispanic, Asian, or mixed-race participants. The study also revealed that time to menstrual cycle regularity is increasing, particularly among lower-income individuals.
A new study found that extreme temperatures are associated with increased risks of death from ischemic and hemorrhagic strokes, particularly in low-income countries. The researchers analyzed data from over 3.4 million ischemic stroke deaths and 2.4 million hemorrhagic stroke deaths across 522 cities in 25 countries.
Replacing diesel school buses with electric ones can yield up to $247,600 in climate and health benefits per individual bus, according to a new study. The benefits include reduced greenhouse gas emissions and lower rates of adult mortality and childhood asthma.
A new study from Harvard T.H. Chan School of Public Health finds that prenatal exposure to antiseizure medication topiramate does not increase the risk of autism spectrum disorder (ASD) among children. In contrast, valproate has been linked to a heightened risk of ASD.
A new study found that chronic exposure to PM2.5 is associated with increased risk of hospital admission for various cardiovascular conditions, particularly ischemic heart disease and cerebrovascular disease. The study suggests that lowering annual average PM2.5 levels could decrease overall cardiovascular hospitalizations by 15%.
A new study found that low-dose calcium supplementation (500mg per day) was as effective as high-dose supplementation (1,500mg per day) in preventing preeclampsia, with no significant difference in preterm birth rates. The findings provide an opportunity to revise the WHO's current recommendation for pregnant women with low-calcium diets.
A new study by Harvard T.H. Chan School of Public Health estimates that social media platforms generated nearly $11 billion in ad revenue from U.S.-based users younger than 18 in 2022. The study found that YouTube derived the greatest ad revenue from users under 18, followed by Instagram and Facebook.