Breast dietary fiber effects

For breast and colon cancer meta-analyses with raw data exist that comprise the major case-control studies done in this area (Howe et al, 1990, 1992). According to these combined analyses, vitamin C may have a strong effect on risk for breast cancer. This finding was not supported by recent prospective studies (Rohan et al., 1993 Hunter et al, 1993). In colon cancer, an inverse effect of vitamin C was seen in an analysis not controlled for other nutrients in the meta-analysis. This effect of vitamin C, however, disappeared when controlled for dietary fiber. 

---