A major study has found that several cancers are becoming more common among younger adults in England, despite improvements in some established risk factors, including smoking and diet. Excess body weight may explain part of the increase, but researchers say it does not account for the full trend. Scientists are investigating other possible contributors, including changes in the gut microbiome, early-life environmental exposures and evolving metabolic factors. Understanding why these cancers are increasing could help improve prevention, identify people at risk and guide future research. However, the findings do not point to a single cause, and further studies are needed to explain the changing patterns of cancer in younger populations.
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