A self-described science nerd is the latest American to get an experimental pig kidney transplant. Doctors at Massachusetts General Hospital announced Monday that Bill Stewart of Dover, New Hampshire, is faring well after his June transplant. It's not the only milestone they're marking in the quest to prove if animal-to-human organ transplants might really work. An earlier Mass General patient has been dialysis-free for a record seven months and counting thanks to a pig kidney. Based on those successes and lessons from some other attempts, U.S. health officials have cleared the first clinical trials of pig xenotransplants.

Prices are falling for the popular obesity treatments Wegovy and Zepbound, but steady access to the drugs remains challenging. Reduced monthly costs for uninsured patients still amount to around $500. That can put the drugs out of reach for many. Coverage also continues to shift or restrict how patients get prescriptions. Doctors say the patchy coverage and costs force them to get creative in treating patients. But there's hope that prices for the injectable drugs may fall more in the future, especially once pill versions enter the market.

IV therapy clinics are springing up around the country, touting quick ways to recover from a hangover or a hard workout. But doctors and regulators preach caution before plunging into a visit. The service has been on a growth spurt since the COVID-19 pandemic, offering drips that also aim to boost energy levels or immune systems or deal with things like joint pain. Regulators worry about who delivers the treatments, the source of any pharmaceuticals used and how the services are provided. Customers should come prepared to ask questions before they get connected.

U.S. health officials plan to phase out eight petroleum-based colors from the nation's food supply. The move would trigger an overhaul of scores of products on U.S. grocery store shelves. Details of the plan were expected to be announced Tuesday afternoon by Health Secretary Robert F. Kennedy Jr. and Food and Drug Administration Commissioner Marty Makary. The FDA currently allows 36 color additives, including eight synthetic dyes. In January, the agency banned the color known as Red 3. Food producers would likely replace the dyes with natural substitutes.