This week’s Health newsletter brings good news about certain carbs and fat; examines why younger people are suffering more strokes and colon cancer ... and finds out how to exercise your way to better brain health. Plus, an extraordinary face transplant; flesh-eating bacteria in Florida

PHOTOGRAPH BY TIM GRAHAM, GETTY IMAGES  

Surprise! As temperatures drop, your appetite may rise for carb-laden comfort food. So here’s some good news: Mounting evidence is shedding light on the many benefits of resistant starch—from reshaping the gut microbiome to preventing certain diseases. 

Related: Is there a ‘good’ fat? Yes.

PHOTOGRAPH BY SCIENCE PHOTO LIBRARY 

Watch out! Colon cancer had been considered something that struck older people, but more younger people are being diagnosed. The “why” is still a mystery, but genetics, the microbiome, and low screening rates may be factors. Here are the most common symptoms.

Related: Why are strokes on the rise—and many of those affected are younger?

PHOTOGRAPH BY FRITZ HOFFMAN, NAT GEO IMAGE COLLECTION 

Related: This rare disorder is a leading cause of blindness in young people

Also: Face blindness is more common than you think 

PHOTOGRAPH BY ANDREW MATTHEWS, PA IMAGES VIA GETTY IMAGES 

Today, we have motion light sensors and smart heating systems, but they may actually impair our ability to shift to less daylight and cooler temperatures. Experts have found tips to adjust from an unlikely place—ancient cultures.

Related: How the idea of outdoor living could help us this winter

Also: What is the winter solstice? Here’s what you need to know.  

Today’s Soundtrack: What You Do To Me, Suzanne Kraft 

Today’s newsletter was edited and curated by David Beard and produced by Amanda Williams-Bryant. Thanks for reading! Have a suggestion? Let us know.