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Nearly half of U.S. adults may not be getting enough sleep, CDC survey data suggested. In 2024, 30.5% of adults slept less than 7 hours per night on average, falling short of recommended guidelines, said Amanda Ng, PhD, MPH, of the National Center for Health Statistics (NCHS) in Hyattsville, Maryland, and co-authors. Only 54.8% of Americans woke feeling well-rested most days or every day, Ng and colleagues reported in NCHS Data Brief. Overall, 15.4% had trouble falling sleep, and 18.1% had trouble staying asleep. Women were more likely than men to have trouble falling and staying asleep, and were less likely than men to wake up well-rested. (George, 4/29)

Surging concentrations of carbon in the atmosphere have produced potent changes in the way plants grow, draining the nutrients from food. (Ahmed and Kaplan, 4/30)

Exposure to common urban air pollutants in the first year of life is associated with a higher burden of respiratory infections and wheezing, according to a longitudinal study led by the Precision Vaccines Program at Boston Children’s Hospital. The findings were presented late last week at the Pediatric Academic Societies 2026 Meeting in Boston. (Bergeson, 4/29)

Increasing your daily consumption of ultraprocessed foods by 10% — basically the equivalent of a small bag of potato chips — may raise your risk of dementia even if you normally eat a healthy plant-rich diet, according to a new study. (LaMotte, 4/29)

San Francisco-based chocolatier Ghirardelli has issued a voluntary recall of certain powdered beverage mixes after a supplier flagged potential Salmonella contamination in an ingredient, the company said Wednesday. The recall affects more than a dozen bulk products — including chocolate and white frappe mixes, hot cocoa powders and flavored drink bases — that were primarily distributed to restaurants and other food service customers. (Vaziri, 4/29)