But progress has been made in discovering its causes, and specialists see a link between diet and cancer in 40 to 70 percent of their cases, whether they be cancer of the liver, stomach, intestine, esophagus, mouth, or even bladder and breast cancer.
根據美國國家科學委員會所完成的「食物與癌症」報告指出，雖然人還不瞭解癌症的真正原因，但致癌的相關因素已比以前清楚，其中百分之四十至七十可能與飲食有關。例如肝癌、胃癌、腸癌、食道癌、口腔癌，甚至膀胱癌、乳癌等，與食物都有關聯。