Which of the following foods is NOT widely believed to be part of the food trio that protects against certain cancers and promotes healthier hearts and immune systems?

The food trio that is widely recognized as protective against certain cancers and beneficial for heart health and immune function typically includes fruits, vegetables, and whole grains. These three food groups are rich in essential vitamins, minerals, and antioxidants that contribute to overall health and help reduce the risk of various diseases.

Fish, while it is a healthy food option and is known for its beneficial omega-3 fatty acids, is not traditionally included as part of the foundational trio focused explicitly on cancer prevention and heart health in the same way as fruits, vegetables, and grains are emphasized. Therefore, fish would not be categorized in the same foundational group concerning the specific question about widely recognized food trios for health protection.