There’s a Troubling Rise in Colorectal Cancer Among Young Adults

Some experts blame our modern, sugary diet, while others think that gut microbiome changes and sedentary lifestyles may play a role. Altogether, the causes are far from clear.

Written byKatarina Zimmer
| 7 min read
polyp colorectal cancer colonoscopy

Register for free to listen to this article
Listen with Speechify
0:00
7:00
Share

ABOVE: Adenomatous polyp
© ISTOCK.COM, SELVANEGRA

Rachel Winegar, a mother of three from Colorado, has had trouble with her digestive system for as long as she can remember. So when she neared 30 and her problems intensified, colorectal cancer did not cross her mind. Her doctor figured it was perhaps a chronic condition like celiac disease, ulcerative colitis, or Crohn’s disease. She was suffering: “rectal bleeding even while passing gas, full feeling, bloated, nauseous, low energy, feeling of sitting on something, pencil-thin stools,” she writes in an email to The Scientist.

After she finally went to a doctor, Winegar was scheduled for a colonoscopy. But instead of finding evidence for any of those conditions, her doctor discovered a mass the size of Winegar’s palm in her rectum, she recalls. It was stage 4 cancer. “My husband and our three kids and I have had our lives turned upside down because of ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Related Topics

Meet the Author

  • katya katarina zimmer

    After a year teaching an algorithm to differentiate between the echolocation calls of different bat species, Katarina decided she was simply too greedy to focus on one field of science and wanted to write about all of them. Following an internship with The Scientist in 2017, she’s been happily freelancing for a number of publications, covering everything from climate change to oncology. Katarina is a news correspondent for The Scientist and contributes occasional features to the magazine. Find her on Twitter @katarinazimmer and read her work on her website.

    View Full Profile
Share
Illustration of a developing fetus surrounded by a clear fluid with a subtle yellow tinge, representing amniotic fluid.
January 2026, Issue 1

What Is the Amniotic Fluid Composed of?

The liquid world of fetal development provides a rich source of nutrition and protection tailored to meet the needs of the growing fetus.

View this Issue
Skip the Wait for Protein Stability Data with Aunty

Skip the Wait for Protein Stability Data with Aunty

Unchained Labs
Graphic of three DNA helices in various colors

An Automated DNA-to-Data Framework for Production-Scale Sequencing

illumina
Exploring Cellular Organization with Spatial Proteomics

Exploring Cellular Organization with Spatial Proteomics

Abstract illustration of spheres with multiple layers, representing endoderm, ectoderm, and mesoderm derived organoids

Organoid Origins and How to Grow Them

Thermo Fisher Logo

Products

Brandtech Logo

BRANDTECH Scientific Introduces the Transferpette® pro Micropipette: A New Twist on Comfort and Control

Biotium Logo

Biotium Launches GlycoLiner™ Cell Surface Glycoprotein Labeling Kits for Rapid and Selective Cell Surface Imaging

Colorful abstract spiral dot pattern on a black background

Thermo Scientific X and S Series General Purpose Centrifuges

Thermo Fisher Logo
Abstract background with red and blue laser lights

VANTAstar Flexible microplate reader with simplified workflows

BMG LABTECH