Email Men who took soy supplements after having their prostate cancer removed were just as likely to see their cancer return as men who didn't take soy, in a new study. According to the American Cancer Society, prostate cancer is the second most common cancer among men after skin cancer. It's estimated that one in every six men will be diagnosed with it.
Some doctors believed compounds found in soy - known as isoflavones - might help prevent prostate cancer, but more recent studies have found those and other nutritional supplements don't reduce the risk of developing the disease see Reuters Health story of May 5, here:.
For the new study, published in the Journal of the American Medical Association, Bosland and his colleagues randomly assigned men who'd had their cancerous prostates surgically removed less than four months earlier to drink either a soy or placebo beverage every day for up to two years between July and May Although the vast majority of the participants reported following the instructions, the study was stopped during an early evaluation because there was no benefit seen with soy, Bosland said.
He and his colleagues found that 27 percent of the participants in the soy group ended up having their cancer return according to prostate-specific antigen PSA blood tests, which are used to check for evidence of cancer. That compared to about 30 percent in the placebo group. But in a way, it was good because the outcome was clear," Bosland told Reuters Health.
Other than undergoing regular PSA tests to check for a recurrence, Klein, who was not involved with the new prostate psa blood test, told Reuters Health patients who had their prostate cancer removed have no promising options to help prevent the cancer from coming back. But both Klein and Bosland said there is some evidence to suggest people who eat soy starting early in life may be less likely to develop prostate cancer in the first place.
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