Soy products and aramatose inhibitors

I was wondering if there is any research about issues with soy products with aramatose inhibitors? I know the cancer council recommend moderation for women on tamoxifen but are there issues with femera? I have a soy cappacino most days as seemed to have developed an issue with milk since chemo. Few places sell almond milk options but most have soy.
Any info greatly appreciated.
Kath
Any info greatly appreciated.
Kath
0
Comments
I asked my oncologist about this when I first started on Femara. Her view was that anything in moderation is ok. A single soy cappacino sounds like moderation to me!
Deanne xxx
I'm on the policy team here at BCNA. Thanks for raising this question about dietary soy and aromatase inhibitors.
At present it is still not clear if eating a diet high in phyto-oestrogens (soy products) is safe for women who have, or have had, breast cancer. For women with oestrogen receptor positive breast cancer who are taking an aromatase inhibitor such as anastrozole, it is still unclear whether eating soy foods or taking soy supplements will block or enhance the actions of the aromatase inhibitors. Results of scientific studies are contradictory, with some studies showing that dietary soy can interfere with the actions of aromatase inhibitors and other studies showing that soy can possibly enhance aromatase inhibitors, such as anastrozole.
As Cancer Council NSW advises, moderate consumption of soy foods, as part of an overall healthy eating plan, is unlikely to have any harmful effects. In the US, the positions of the American Cancer Society and the American Institute for Cancer Research are similar: that soyfoods can be safely consumed in moderation by women with breast cancer. It is best however to avoid high doses of soy products, such as soy supplement tablets or powders.
You can also read more about Cancer Council Australia's response to soy and breast cancer on their iheard site, here.Note they do not mention aromatase inhibitors, only tamoxifen. I am currently following up with them on any evidence surrounding aromatase inhibitors and soy. I will keep you all posted.
If you have any questions or concerns about soy food consumption and your breast cancer treatments, it is always best to speak with your oncologist.
I hope this is helpful!
Best wishes
Pauline McLoughlin
I am lactose intolerant and drink quite a bit of soy milk, yogurt and other products.
I had planned to take that up with my Oncologist next visit.
Have switched to Lactose free for the time being.
Cancer Council Australia does not have further info on this issue - other than what I have stated above.
I hope this information has been helpful.
A serve was listed as 1 cup of soy milk, 2 slices of soy and linseed bread, 35g of soy breakfast cereal, 100g of tofu or 5g of linseeds. The benefit is only from consuming food sources not from supplements taken as powders or pills.
I felt uncomfortable with this as my oncologist had said that I didn't need to avoid soy but recommended limiting myself to 1 serve per day. I chose to follow his advice.
I have copied the links to the studies quoted - hopefully they work.
http:/www.aicr.org/cancer-research-update/2012/november_21_2012/cru-soy-safe.html
http:/www.aicr.org/foods-that-fight-cancer/soy.html#research