The rise of early-onset cancer: What does the data say and how can you stay ahead?
You’ve probably heard the term preventative care circulating in the wellness world — and for good reason. Preventative care, or preventative medicine, has become more important than ever, as we’re learning that the onset of serious diseases might begin much earlier in life than previously thought.
Recent data has highlighted a troubling trend: Early-onset cancers — those diagnosed in people under 50 — are on the rise. Colorectal, breast, and pancreatic cancers, in particular, have seen a significant increase, leaving researchers searching for answers. While genetics plays a role, the rapid spike in cases suggests that environmental and lifestyle factors are major contributors.
Dr. Raphael Cuomo, a professor and biomedical scientist at the University of California San Diego School of Medicine, is a clinical cancer epidemiologist specializing in population-level cancer trends and risk variables. When asked what he thinks is behind this uptick in earlier diagnoses, he notes that “the increase in early-onset cancers is likely driven by lifestyle changes over the past few decades, particularly poor diet, obesity, and sedentary behavior.” While genetic predisposition matters, these cancers are rising too quickly to be explained by genetics alone.
Who Is Most at Risk?
Early-onset cancer trends vary based on race, gender and geography. “For example, colorectal cancer rates are rising disproportionately among Black Americans, while breast cancer in younger women shows disparities by race and socioeconomic status,” Dr. Cuomo notes. Geographic differences also point to the fact that diet, pollution, and access to healthcare affect risk levels as well.
Diet and Processed Foods
A growing body of research connects dietary choices to increased cancer risk, especially ultra-processed foods, refined grains and processed meats. “These foods promote obesity, inflammation, and microbiome disruptions, all of which contribute to cancer development,” Dr. Cuomo states. Colorectal cancer, in particular, has been strongly linked to dietary factors, making nutrition a key area for cancer prevention.
Environmental Toxins
Concerns over environmental toxins, including endocrine disruptors and PFAS (often called “forever chemicals”), continue to grow. “There’s evidence that PFAS, BPA, and other endocrine disruptors may increase cancer risk by altering hormone regulation, immune function, and inflammation,” says Dr. Cuomo. These chemicals are commonly found in food packaging, household items, beauty products, and even drinking water, making them difficult to avoid.
Gut Health
The gut microbiome is another emerging factor in cancer research. “Diets high in processed foods and low in fiber negatively impact the gut microbiome, reducing protective bacteria and increasing inflammation,” Dr. Cuomo explains. This imbalance can raise the risk of colorectal and other digestive cancers. Eating a fiber-rich diet can help restore optimal gut health and lower cancer risk.
Should Screening Guidelines Change?
Historically, cancer screening has focused on older adults, but the rise in early-onset cases is prompting reconsideration of this notion. “Rising early-onset cancer rates tell us earlier screening may be necessary, especially for those with risk factors like family history, obesity, or inflammatory conditions,” says Dr. Cuomo. In response to these trends, colorectal cancer screening guidelines have already been lowered from age 50 to 45, and further adjustments may be needed as we learn more.
How to Reduce Your Risk
While some elements of risk are out of our control, there are certainly proactive measures you can take to lower your cancer risk. Dr. Cuomo emphasizes that “maintaining a healthy weight, limiting processed foods, increasing fiber intake, staying physically active, and avoiding tobacco and excessive alcohol are key.”
A crucial aspect of prevention is becoming more conscious of your everyday choices. This means paying attention to the foods you eat — what ingredients are in them? Where do they come from? Are they giving your body what it needs to keep you healthy? The same is true for the products you buy and use. And perhaps most importantly, it means becoming more aware of how you feel on the whole.
By increasing awareness of these factors, you can practice preventative medicine daily. Developing this level of self-awareness enables you to recognize when something might not be right and advocate for your health, making informed decisions that can lower your long-term cancer risk no matter your age.
AI, Big Data and the Future of Cancer Research
Artificial intelligence and big data are revolutionizing cancer research as quickly as they are in many other fields, helping identify potential risks and improve early detection. “AI and big data allow researchers to use strong mathematical techniques to investigate potential relationships between environmental and behavioral exposures and cancer risk,” Dr. Cuomo explains. These tools are already shaping personalized cancer prevention strategies and refining screening recommendations.
Emerging Areas of Concern
Beyond diet and lifestyle, researchers are exploring other overlooked contributors to early-onset cancer. “Disrupted sleep patterns, chronic stress, and even microplastics in food and water are emerging areas of concern,” says Dr. Cuomo. Additionally, frequent antibiotic use may alter the gut microbiome in ways that might increase cancer risk, researchers have reported.
Exciting Advances in Prevention and Detection
The future of cancer prevention and early detection is promising. “Liquid biopsy, or detecting cancer with blood tests, could dramatically improve survival rates by enabling earlier diagnoses,” Dr. Cuomo said. Advances in AI-driven risk prediction and more customized treatment strategies are also on the horizon, offering hope for more effective and individualized cancer prevention plans.
The Bottom Line
The rise in early-onset cancers is a complex issue with multiple factors at play. While genetics is certainly part of it, lifestyle choices, environmental exposures, and access to healthcare or the lack thereof are driving the increase.
The good news? Many of these elements are within our control. By making informed choices about diet, exercise, and screening, you can take meaningful steps to reduce your cancer risk. And with ongoing research and technological advancements, the future of cancer prevention looks brighter.
This story was originally published February 27, 2025 at 12:33 PM.
