Colorectal cancer cases surge among adults under 50, prompting earlier screening

Incidence of colorectal cancer is increasing among adults younger than 50, now accounting for a growing share of deaths from the disease worldwide. The World Health Organization notes over 20 million new cancer cases annually, and recent data show that 45 % of new colorectal diagnoses occur in people under 65, up from 27 % in 1995. In response, the U.S. Preventive Services Task Force lowered the recommended screening age from 50 to 45, and experts at Stanford Medicine say the rise cannot be explained solely by better detection, pointing to lifestyle factors such as obesity, sedentary habits and consumption of ultra‑processed foods.

Simultaneously, fermented foods are gaining attention for gut health. U.S. dietary guidelines now encourage higher intake of whole‑food ferments like yogurt, kefir, kimchi and sauerkraut. Researchers at New York University, the University of Massachusetts and Stanford emphasize that while fermented foods can support a balanced microbiome, not all fermented products are beneficial—alcoholic beverages and mass‑produced items may lack live probiotics. Health officials caution against misleading marketing of “probiotic” claims and stress that a varied, fiber‑rich diet remains central to reducing colorectal cancer risk.