Kids who are the youngest in their grade may be overmedicated for attention deficit hyperactivity disorder (ADHD), according to a Norwegian researcher who studied prescribing data. Those who were also born preterm were at particular risk of being overmedicated, said Dr. Christine Strand Bachmann, a pediatrician at St. Olav’s University Hospital in Trondheim and PhD…  read on >  read on >

Air pollution is plaguing the world’s oldest subway system, a new study warns, with high levels of tiny metal particles found in dust samples throughout the London Underground. Whether these particles actually pose a risk to human health remains an open question, British researchers acknowledge. But experts say it’s happening in subway systems elsewhere, including…  read on >  read on >

So much for vaping as a smoking-cessation tool: New research finds most folks who use both traditional cigarettes and e-cigarettes are likely to continue smoking rather than quit, a new study finds. How much is most? Only 10% quit vaping and smoking. “As used by the general population, e-cigarettes have not contributed to substantial smoking…  read on >  read on >

Scientists have pinpointed four genes that seem to play a part in how vulnerable you are to suicidal thoughts or behaviors. “It’s important to note that these genes do not predestine anyone to problems, but it’s also important to understand that there could be heightened risks, particularly when combined with life events,” said study co-author…  read on >  read on >

Bees, in their role as master pollinators, increase crop yields, leading to more production of healthy fruits, vegetables and nuts. But new research claims that the challenges these important insects face from changes in land use, harmful pesticides and climate change is affecting food production, leading to less healthy food in global diets and more…  read on >  read on >

Two pharmaceutical companies said Tuesday that they have made notable progress with a vaccine that could prevent melanoma. Moderna, well known for its work on the COVID vaccine, and Merck, which makes the cancer immunotherapy drug Keytruda, announced that the combination performed well in a small study of patients who had the cancer surgically removed.…  read on >  read on >