University of Southern California - Health Sciences Apr 17 2026 A diet rich in fruit, vegetables and whole grains is generally recommended for better health and to lower the risk of cancer and other diseases.  However, new research from USC Norris Comprehensive Cancer Center, part of Keck Medicine of USC, presented at the annual meeting of the American Association for Cancer Research suggests that this type of diet may put non-smoking Americans under the age of 50 at greater risk of developing