Eating a diet high in ultraprocessed foods is associated with an increased risk of dementia, according to new research, adding to the growing list of health problems linked to foods such as packaged cookies, hot dogs and chips.

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Though we often think of anesthesia as putting us in a deep sleep, new research suggests it could actually be closer to being in a coma than previously thought. And there’s still lots we don’t know about how these drugs work on the brain, even though thousands of patients undergo a general anesthetic every day.

A new study showed that GammaTile, a radioactive wafer the size of a postage stamp, nearly doubled survival rates and nearly eliminated tumor regrowth in people who had it placed in the spot where brain tumors were surgically removed.

The FDA launched a safety study of the abortion pill, also known as mifepristone, a step that could eventually lead the Trump administration to restrict how it’s distributed and used.

The autism-therapy business is booming—and so is the billing abuse. A WSJ investigation found that predatory providers are billing for phantom services, padding their hours and charging steep fees. Here are five takeaways from the report.

A rare strain of Ebola has reached territory controlled by Islamic State militants in the Democratic Republic of Congo, a place too dangerous for health workers fighting to stop the deadly virus.

Abivax’s bowel-disease drug hit its goals in a late-stage trial, but shares of the French biotech company plunged amid investor concerns about the drug’s safety profile.

A melanoma drug from Replimune Group got a third chance, despite previous FDA rejections, after the White House pushed health officials to re-examine the treatment.

The share of apparel exchanges where shoppers sized down in 2025, a figure that’s risen in each of the past three full calendar years, according to a review of 38 retailers by Narvar. Retailers are struggling with rising returns as shoppers on GLP-1s lose weight—a trend that’s particularly acute in larger sizes. As the drugs become more accessible through price cuts and a pill version, retailers are taking a harder line to keep returns in check.

• What your hair color might tell you about your health. (The Washington Post)

• For pancreatic cancer patients, an exciting drug can feel out of reach. (STAT News)

• No one understood her grief, so she turned to “grieftok.” (The New York Times)

The Health newsletter is your weekly guide to all the news that affects your health and well-being. This edition was curated and edited by Conor Grant—send him feedback or questions at conor.grant@wsj.com (if you’re reading this in your inbox, you can just hit reply). Got a tip for us? Here’s how to submit.