Summary epidemiologic data reporting relative risk of breast cancer by total dietary intake are presented in Table 2. Most of the case control studies find no association, or a slight, but non-significant increase with high intakes.
Notable exceptions are the studies from Argentina and China.
The authors of the Argentinian study have no explanation for the observed effect - and were unable to associate the eight to nine fold increase in risk in its top energy consumers with any specific food group. This fact, together with the bias that would have been introduced by employing hospital controls excluding patients with cardiovascular and liver disease, as well as other cancers, makes the relevance of this study to western society difficult to assess. The views or opinions stated in external resources which are links on this home page do not necessarily reflect those of the National Breast Cancer Centre.