For decades, colon cancer was largely considered a disease of older adults. But a concerning trend is emerging: colorectal cancer is now the leading cause of cancer-related death for adults under 50 in the United States. A recent study published in January 2026 by the Journal of the American Medical Association confirmed this shift, prompting renewed calls for earlier screening and increased awareness. This rise is particularly alarming because it’s happening even as death rates from many other common cancers, like breast, lung and leukemia, are declining.
The American Cancer Society reports that rates of colon cancer have been steadily increasing by about 1% each year since 2005. This isn’t simply a statistical anomaly; it represents a real and growing threat to a younger population. Approximately one in 24 people will be diagnosed with colon cancer in their lifetime, and around 150,000 Americans receive a diagnosis annually. But the key takeaway is that early detection dramatically improves outcomes. “Colon cancer is a life-threatening disease, but it’s a highly curable form of cancer and has a 90% survival rate when detected early,” explains Dr. Nathan Merriman, MD, medical director for gastroenterology and digestive health at Intermountain Health.
The Changing Landscape of Colorectal Cancer Risk
What’s driving this increase in cases among younger adults? The answer is complex and likely multifactorial. While genetics play a role, the vast majority – around 75% – of colon cancers occur in individuals with no family history. This suggests that lifestyle and environmental factors are significant contributors. Emily Van Komen, NP, a nurse practitioner in gastroenterology at Intermountain Health, points to a particularly striking statistic: “People born around 1990 have twice the risk of colon cancer and four times the risk of rectal cancer, compared with those born around 1950.”
Experts believe several factors are at play, including dietary habits – specifically, a diet high in processed foods and red meat – as well as increased rates of obesity, sedentary lifestyles, tobacco use, and alcohol consumption. Metabolic disease is also increasingly recognized as a contributing factor. These lifestyle elements, combined with potential changes in the gut microbiome, are thought to be altering the risk profile for colorectal cancer in younger generations.
When Should You Be Screened?
The recommended age for beginning regular colorectal cancer screening has recently shifted to 45 for individuals at average risk. This change, driven by the rising incidence in younger adults, reflects a growing consensus among medical professionals. “A colonoscopy is the gold standard of screening for colon cancer because if pre-cancerous polyps are identified, they can be removed easily during the screening colonoscopy,” says Van Komen. This preventative aspect is crucial; removing polyps before they grow cancerous can effectively eliminate the risk of developing the disease.
However, a significant barrier to early detection is that roughly one-third of eligible individuals don’t get screened. Delaying or skipping screening provides an opportunity for cancer to develop and progress, often to more advanced stages where treatment is more challenging and survival rates are lower. It’s also important to be aware of family history. “We all need to talk to our family members about any family history of colon cancer, polyps, ulcerative colitis, or Crohn’s disease,” advises Merriman. “If you have any of those in your family history, you may be at higher risk for colon cancer. Talk to your doctor about getting screened earlier than age 45.”
Recognizing the Symptoms
While screening is the most effective way to detect colon cancer, being aware of potential symptoms is also vital. It’s crucial not to dismiss these signs, even if you’re young and consider yourself healthy. Symptoms that warrant a visit to your primary care physician include:
- Rectal bleeding or bleeding with a bowel movement (which may appear on toilet paper, in the toilet bowl, or in your stool).
- Anemia or low iron levels.
- Changes in bowel habits.
- Persistent abdominal pain.
- Unexplained weight loss.
Dr. Merriman emphasizes, “Don’t dismiss symptoms of rectal bleeding, assuming it’s just hemorrhoids. Ask your doctor about how to determine the cause of rectal bleeding and rule out colon cancer or other serious gastrointestinal conditions, even if you’re young.”
Beyond Screening: Lifestyle Choices for Prevention
While screening is paramount, adopting a healthy lifestyle can significantly reduce your risk of developing colorectal cancer. This includes:
- Maintaining a healthy weight.
- Limiting red and processed meat consumption.
- Avoiding ultra-processed foods.
- Engaging in regular exercise – aiming for at least 150 minutes of moderate-intensity activity per week.
- Avoiding tobacco products.
- Limiting alcoholic beverage intake.
Simple habits like staying hydrated and consuming a fiber-rich diet can also promote digestive health and prevent constipation, further reducing risk.
For those at average risk, a colonoscopy remains the preferred screening method. However, at-home stool-based screening kits are also available and can be a convenient first step. Positive results from these kits typically necessitate a follow-up colonoscopy. More information on at-home screening options can be found here.
Colorectal cancer is a serious disease, but it is also one that is often preventable and highly treatable when caught early. The increasing incidence in younger adults underscores the importance of proactive screening and a commitment to healthy lifestyle choices. The conversation around colorectal cancer needs to shift, recognizing that it’s no longer solely a disease of the elderly, but a growing concern for all adults.
Researchers continue to investigate the underlying causes of this concerning trend, and ongoing studies will undoubtedly provide further insights into prevention and treatment strategies. The next major update on colorectal cancer incidence and mortality rates is expected from the American Cancer Society in early 2027.
Have questions about colorectal cancer or your personal risk? Share your thoughts in the comments below, and please share this article with your friends and family to help raise awareness.
