Health
New Research Links Ultra-Processed Foods to Higher Risk of Cancer-Related Polyps in Women
Women who ate the most ultra-processed foods had a higher risk of developing polyps that can lead to cancer compared with women who ate the least. That finding sits at the centre of a new study that is drawing attention to how shifts in modern eating habits may be shaping health outcomes. Scientists have pinpointed a potential driver of the global rise in colon and rectal cancers among young people: ultra-processed foods.
These foods, which include packaged snacks, mass-produced breads, sweetened breakfast cereals, instant noodles and frozen pizzas, have become a significant part of daily diets in recent decades. During that time, doctors have reported a noticeable rise in colorectal cancers diagnosed before age 50. “When a couple gets divorced, everyone in their orbit is affected—not just the two people whose ‘I do’ turned into ‘I don’t.’ And boy, does that crowd have something to say about it. Some people are so shocked that they can’t restrain their nosiness. Others fear divorce is contagious and will happen to them.” Researchers say the same ripple effect can be seen in public health: as eating patterns shift, the wider population may feel the impact in unexpected ways.
In the latest research, results were drawn from more than 29,000 U.S. women whose diets and endoscopy records were tracked across two decades. By reviewing long-term data, scientists were able to compare the health outcomes of women who consumed high levels of ultra-processed foods with those who ate far less.
The study showed that women with the highest intake faced a 45 percent greater risk of developing adenomas — growths or polyps in the colon and rectum that can become cancerous — than women with the lowest intake. Most polyps are harmless, but some can progress into cancer over several years.
“The increased risk seems to be fairly linear, meaning that the more ultra-processed foods you eat, the more potential that it could lead to colon polyps,” said Dr. Andrew Chan, a gastroenterologist at the Mass General Brigham Cancer Institute and one of the study’s authors. He added that reducing consumption of these foods, often high in sugar, salt, saturated fat and additives, could help “mitigate the rising burden of early-onset colorectal cancer.”
Researchers noted that ultra-processed food intake did not appear to influence the risk of serrated lesions, another type of precursor to colorectal cancer. The pattern held even when other known risk factors such as obesity and low fibre intake were considered.
Published in JAMA Oncology, the study stops short of proving that ultra-processed foods directly cause cancer. Scientists say more work is needed to understand which types of ultra-processed foods may pose the greatest harm and what other factors could be driving the rise in early-onset colorectal cancer. Many women in the study consumed most of their ultra-processed food through breads, breakfast items, sauces, spreads and sweetened beverages.
“Diet isn’t a complete explanation for why we’re seeing this trend — we see many individuals in our clinic with early onset colon cancer who eat very healthy diets,” Chan said.
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
Europe Records Sharp Rise in Sexually Transmitted Infections, ECDC Warns
Health
White House Rejects Report It Blocked Return of Ebola-Infected US Doctor
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