Imagine receiving a life-altering diagnosis in your youth, a disease once considered the domain of the elderly. This is the stark reality for an increasing number of young adults, like Umanita, who are facing colon cancer. But here’s where it gets even more alarming: the reasons behind this surge remain shrouded in mystery, despite growing awareness and advanced testing. Could it be something as mundane as our daily diet? Or is there a more complex web of factors at play?
Umanita’s story is a stark reminder of this trend. Just two weeks after experiencing abdominal pain, she was diagnosed with colon cancer, thrusting her into a growing community of young adults battling this disease. 'It felt like a nightmare,' she recalls, 'something completely unreal.'
And this is the part most people miss: while increased screening has contributed to more diagnoses, it doesn’t fully explain the rise, especially in those under 45. According to the American Cancer Society, individuals under 55 accounted for one-fifth of the 145,000 new colorectal cancer cases in 2019—double the rate from 1995. By 2024, it became the leading cause of cancer deaths in men under 50 and the second for women in that age group. But why?
Scientists are zeroing in on potential culprits, with diet—particularly ultraprocessed foods—emerging as a key suspect. Health Secretary Robert F. Kennedy Jr. has even labeled such foods as 'poison,' linking them to a surge in health issues. His new dietary guidelines urge a dramatic reduction in highly processed foods laden with added salt and sugar. Boston’s academic medical centers are leading the charge, using patient data to explore why otherwise healthy young adults are developing these devastating cancers.
A recent study by MGB researchers found a startling connection between ultraprocessed foods—think sugary snacks, salty chips, and additive-laden meals—and the development of precancerous polyps. 'We know traditional risk factors aren’t the whole story,' says Dr. Andrew Chan of Mass. General. 'There’s still so much to uncover.'
But here’s the controversial part: while diet is a strong contender, it’s not the only factor. Some cancers have clear causes—smoking for lung cancer, HPV for cervical cancer—but colorectal cancer is likely influenced by a complex interplay of genetics, lifestyle, and environmental factors. Umanita’s case is a prime example. With no obvious genetic predisposition, everyone around her speculated: Was it her diet? Microplastics? The COVID-19 vaccine? 'People search for answers,' she says, 'but I don’t have one.'
Umanita’s journey didn’t truly sink in until she returned home after her initial hospital stay. The hospital’s chaos—constant tests, IV drips, and tube feeding—had been a distraction. But at home, reality hit. She dreamed of simple pleasures like grilled cheese and tomato soup, but her focus soon shifted to treatment. Despite her diagnosis, she refused to pause her life, juggling a full courseload and a teaching assistant role. 'Cancer,' she says, 'became my new reality.'
As a psychology major, Umanita had studied cancer, but now it was personal. Her life continued as normally as possible, balancing chemo with classes. She drove between her parents’ home and Boston, attending online classes between infusions. She consulted a dietitian, wrote a paper on cancer and diet, and swore off red and processed meats. Yet, she found purpose in participating in research, donating tissue samples, and filling out surveys—a fitting contribution for someone aspiring to become a researcher.
Dr. Chan recalls a similar case from 20 years ago: a woman under 40, diagnosed with colon cancer while caring for her children and aging mother. 'It hits harder when it’s a young person,' he says. 'They have so much life ahead of them.'
While screening explains some increased diagnoses, it doesn’t account for the rise in younger patients, who often ignore subtle symptoms like pain, irregular bowel movements, or bloody stool. By the time they seek help, they’re sicker than older patients with the same disease. Established risk factors like obesity and inactivity play a role, but are they the full story for younger adults?
Chan’s team recently published a study in JAMA Oncology, analyzing the diets of nearly 30,000 women under 50. They found that those consuming the highest levels of ultraprocessed foods had a 45% higher risk of developing precancerous polyps compared to those eating the least. 'What we eat directly impacts our colon,' explains Dr. Lilian Chen, chief of colorectal surgery at Tufts Medical Center. Yet, ultraprocessed foods alone don’t explain everything. Many patients with healthy diets and active lifestyles still develop the disease. 'Standard risk factors don’t apply to everyone,' Chan notes.
Here’s the bigger question: Can years of unhealthy eating be reversed? That’s what Chan aims to study next. For Umanita, after surgery and 12 rounds of chemo, ringing the bell at Mass. General marked the end of treatment. But the emotional toll lingered. Her oncologist, Dr. Aparna Parikh, recalls the most difficult visit months after treatment ended. 'She’s strong, but she’s not okay,' Parikh says. The sudden halt after months of intense treatment left Umanita grappling with fear of recurrence. Her life, she says, is now divided into 'before cancer' and 'after.'
Umanita has embraced changes to reduce future risk—regular exercise, more fiber, and avoiding red meat (except for special occasions). Yet, she acknowledges there are factors beyond her control. 'It’s complicated,' she says. 'But that’s the truth.'
Now, here’s where we turn to you: Do you think diet is the primary driver of this alarming trend? Or could there be other, less obvious factors at play? Share your thoughts in the comments—let’s spark a conversation that could shed light on this growing concern.
