Is Soy O.K. For Women With Breast Cancer?

Is soy o.k. for women with breast cancer? This has been a controversial question for some years now leading many doctors to tell their patients with breast cancer to stay away from it. Here is a more positive update from Dr. Steve Chaney on the research of soy as it relates to breast cancer:

Hi Susan,
      You've probably heard the warnings: "Soy may increase  the risk of breast cancer!" "Women with breast cancer shouldn't use soy!" The first warning was never true. Numerous clinical studies have shown that consumption of soy protein is  associated with a lower risk of developing breast  cancer. Furthermore, the science behind the second warning has never been very strong. The concerns that soy might stimulate the growth of breast cancer cells was based primarily on cell culture experiments and one  experiment in mice  even though a second experiment in mice came to the exact opposite conclusion.


However, the possibility that soy isoflavones could stimulate the growth of estrogen - responsive breast cancer was biochemically plausible because soy  isoflavones bind to the estrogen receptor and have a very weak stimulatory effect (much weaker than estrogen  itself). Even that evidence was not definitive because soy  isoflavones also turn on several tumor  suppressor pathways in breast cells and help strengthen  the immune system - so they could just as easily inhibit the growth of beast cancer cells.
However, because the concerns were plausible and had not been definitively disproved, most experts,
including me, have recommended that women with estrogen - responsive breast cancer might want to avoid soy protein. Well a definitive study has finally been performed and it turns out for women with breast cancer, consumption  of soy foods actually decreases their risk of breast cancer recurrence and dying from breast cancer.

The study was reported in the December 2009 issue of  the Journal of the American Medical Association by researchers at Vanderbilt University and Shanghai  Institute of Preventive Medicine. It was a large, well designed, study that enrolled 5042 Chinese women aged 20 to 75 years old who had been  diagnosed with breast cancer and followed them for an average period of 3.9 years. The women were divided into four groups based on the  soy content of their diet (ranging from 5 grams/day to  15 grams/day).
The results were clear cut. Breast cancer survivors with the highest soy intake had 25% less chance of breast cancer recurrence and 25% less chance of dying  from breast cancer than the women with the lowest soy intake. The effect was equally strong for women with estrogen receptor-positive and estrogen receptor negative cancers, for early stage and late stage breast cancer and for pre- and post-menopausal women.

In short this was a very robust study. The study also showed that soy protein intake did not  interfere with tamoxifen. The reduction in the risk of breast cancer recurrence & death was just as great  whether the breast cancer survivors were taking tamoxifen or not. In fact, tamoxifen was protective only for women with
low soy intake. It conferred no extra protection for  the women at the highest level of soy intake. What does this mean for you if you are a breast cancer  survivor?

I personally feel that this study is clear cut enough that breast cancer survivors no longer need to fear soy
protein as part of a healthy diet. However. it is important to recognize that this is a  single study. It is a very good study, but it is just one study. As a scientist and a cancer researcher I would like to  see this study confirmed by other studies before recommending that all women who have had breast cancer  should add soy protein to their diets. It may turn out  that some women will benefit much more from using soy  protein than others.

Similarly, this study suggests that soy protein does not interfere with tamoxifen. But the use of tamoxifen after breast cancer remission  is a medical treatment - and all medical treatments  should be discussed with your doctor. Finally, I would like to point out that a number of  previous studies have suggested that isolated
isoflavones may not have the same benefits as soy  protein foods containing the isoflavones - so I don't
recommend skipping the soy protein and opting for an isoflavone supplement instead.>

 To Your Health!

 Dr. Stephen G Chaney
 http://www.chaneyhealth.com/


These statements have not been evaluated by the Food and Drug Administration. This information is not
 intended to diagnose, treat, cure or prevent any disease

http://www.power-blog.com/free1/3867

How To Get Rid Of That Stubborn Belly Fat & Turn Back Your Biological Clock

How to get rid of that stubborn belly fat and turn back our biological clock will be the subject of this Monday's tele-clinic with Dr. Richard Brouse. It was originally scheduled for last month, but due to inclement weather on the East Coast, Dr. Brouse's flight was cancelled and he couldn't get home in time., so it has been rescheduled for:

This Monday night Apr.5th 8:00 p.m. Eastern time, 5:00 p.m. Pacific. To join the conference call just dial 712 432 0075 Access code 403964# The conference call will end with a question and answer period.
This tele-clinic will be recorded and available to hear for 2 weeks. The call playback no. is 712 432 1085 with same access code as above.

http://www.power-blog.com/free1/3867