Yogurt is rich in probiotics, the "good" bacteria similar to those normally living in your intestines. Probiotics have become popular because they are thought to help keep balance in your gut -- everything from preventing vaginal yeast infections to restoring normal bowel functions (preventing diarrhea and constipation).
Many people use probiotic supplements while taking antibiotics, but cancer patients may also benefit from this friendly flora.
Probiotics have shown to be effective in preventing diarrhea and weight loss, or at least making those side effects less severe. In a 2007 study conducted by the Department of Medical Oncology at Royal Adelaide Hospital in Australia, probiotics successfully prevented these two side effects following treatment with Irinotecan, a form of chemotherapy used often with colon and rectal cancers.
In fact, many of the studies about probiotics and cancer focus specifically on colon cancer and how certain probiotics may have an effect on how enzymes in our bodies convert (or don't convert) procarcinogens into cancerous cells.