A tentative explanation of a phenomenon that can be tested I believe is a scientific experiment.
Donna's favourite foods are associated with high risk of developing stomach cancer. Recent scientific findings suggest that there are specific diet habits which could increase someone's risk of stomach cancer and these are a diet low in fruits and vegetables and high in salty and smoked foods. More specifically, it has been found that eating high quantities of processed meat increases the risk of cancer in the lower stomach. Donna's favourite foods include hot dogs and cured ham, which are types of processed meat.
