June 3rd, 2011
03:51 PM ET

How much is too much phytoestrogen?

Every weekday, a CNNHealth expert doctor answers a viewer question. On Friday, it's Dr. Melina Jampolis, a physician nutrition specialist.

Asked by Keyana of Spokane, Washington:

I have two questions. What is considered to be a high/harmful amount of phytoestrogen in a woman's diet per day? And should a woman who has had cancer not take estrogen replacements or eat a diet high in phytoestrogens?

Expert answer:

Hi, Keyana. These are interesting questions. I'm going to assume that you are talking about breast cancer since the association of phytoestrogen consumption and breast cancer risk is the most concerning to many women.

Phytoestrogens are plant-based compounds that act like the hormone estrogen. There are two basic types of phytoestrogens: isoflavones and lignans.

Soy products are the most common source of isoflavones, and the controversy surrounding cancer and phytoestrogens are related to soy products. To provide you with the best possible response to your question, I turned to noted cancer nutrition expert Rachel Beller, who addresses this question on a regular basis at the Beller Nutritional Institute in Los Angeles.

Beller explained that while phytoestrogens are similar to human estrogens, their effect on human estrogen levels has not been well-researched because plant estrogens are 1,000 times weaker than the estrogen produced in our bodies.

Many studies suggest that soy isoflavones' estrogen-like effects are probably too weak to have any significant consequence on breast tissue in healthy women - that includes breast cancer survivors.

Regarding the association with breast cancer, Beller points to a 2011 study published in Cancer Epidemiology, Biomarkers & Prevention that found soy to be safe and favorable, even for breast cancer survivors, when eaten in its natural, unprocessed state - for example, tofu, tempeh, edamame, miso soup.

In fact, experts agree that fermented soy (miso, tempeh) is good for you. The fermentation process alters the chemical makeup of soy, which reduces the level of isoflavones by as much as 300%.

Therefore fermented soy foods have three times less of the chemical in question.

While this study does not conclusively establish the safety of soy, phytoestrogens aside, soy is not only an excellent source of heart healthy plant-based protein, which is encouraged in the latest dietary guidelines for Americans, it also contains dozens of nutrients that also appear to help fight cancer development.

These nutrients can protect cells from becoming damaged, encourage faulty cells to die instead of reproducing, regulate cell growth and even improve cell communication. These are all things that help strengthen your body against cancer and heart disease.

A study has also shown that consumption of soy early in life may help protect against breast cancer later in life, even if it may be more questionable for post-menopausal women.

What's also noteworthy is that Asians have been eating soy foods in large amounts for centuries, and their traditional soy-rich diets are associated with lower risks of breast and prostate cancer than Western diets.

Beller goes on to say that the "bad rap" that soy's been getting is due to the fact that when we hear something's "good for you," we process it to the max, extract the good stuff and concentrate it, which basically makes it lose its original identity.

Skip the processed soy foods and supplements, especially if you have a history of breast cancer.

The bottom line: If you have no history of breast cancer, there is no known high or harmful amount of phytoestrogens, and foods such as unprocessed soy are an important part of a healthy diet.

If you have a history of breast cancer, as with nutrition in general, you should not focus on a single food or nutrient. The key is moderation.

The phytoestrogens consumed by eating moderate amounts of relatively whole and unrefined forms of soy foods (two to three times a week) can be considered part of a healthy, complete diet.

Regarding estrogen replacement therapy, according to the National Cancer Institute, "Studies of hormone use to treat menopausal symptoms in breast cancer survivors have produced conflicting results," so I suggest speaking with your physician to determine the best approach for you.

Follow Dr. Jampolis on Twitter

soundoff (924 Responses)
  1. JnscCrulk

    viagra viagra grapefruit interaction can you buy viagra without a prescription http://erectilejyzd.com/index.php?called=terms – viagra indien bezahlung mit paypal ’

    February 1, 2021 at 03:54 | Report abuse | Reply
  2. KbbgMile

    buy viagra uk Sumycin original viagra uk http://erectilejyzd.com/ – Micardis ’

    February 1, 2021 at 06:08 | Report abuse | Reply
  3. Shirly Mrozoski

    This is a very interesting article. Please, share more like this!


    February 1, 2021 at 11:04 | Report abuse | Reply
  4. Money Robot

    Get Our Passive Income System – Step 1: Get our ready made niche websites, Step 2: Setup your Paypal account. Step 3: Run our Unlimited Traffic System from 850 sources of traffic (Approximately 35000 views a day guaranteed). Then just wait and earn your income 100 on autopilot. More info: https://www.k3reviews.com/2020/08/16/monster-mode-700k/


    February 1, 2021 at 12:36 | Report abuse | Reply
  5. FhnhZisse

    Cordarone Microzide Sustiva https://canadianpharmacy-yy.com/ – pharmacy intern ’

    February 1, 2021 at 20:06 | Report abuse | Reply
  6. NgscZisse

    cheap viagra online india where can i buy viagra online safely how to viagra online http://canadianpharmacy-yy.com/Fitness/how-to-get-a-six-pack.html – how to purchase viagra online ’

    February 1, 2021 at 20:45 | Report abuse | Reply
  7. AhmdEncox

    cialis in canada pharmacy Cialis cialis dose https://impotencecdny.com/ – Floxin ’

    February 1, 2021 at 21:43 | Report abuse | Reply
  8. NncsZisse

    generic viagra master card accepted costco pharmacy pricing canada and viagra online

    February 3, 2021 at 10:30 | Report abuse | Reply
  9. JbnbCrulk

    viagra canada cialis canada canada pharmacy no prescription

    February 3, 2021 at 16:13 | Report abuse | Reply
  10. KbcxMile

    canadian pharmacies apollo pharmacy online ed drugs

    February 4, 2021 at 19:38 | Report abuse | Reply
  11. FqhhEncox

    canada pharmacy online no script antibacterial Cialis Soft Tabs

    February 5, 2021 at 12:45 | Report abuse | Reply
  12. JbbvEncox

    no prescription pharmacy canadian king pharmacy online medicine shopping

    February 5, 2021 at 17:56 | Report abuse | Reply
  13. Rosalie Mcgarvie

    Earn $100/Day With Our Passive Income System – Best Autopilot income system 2021


    February 5, 2021 at 19:59 | Report abuse | Reply
  14. Jose Kettman

    Earn $1000/Day With Our Passive Income System – Best Autopilot income system 2021


    February 6, 2021 at 04:17 | Report abuse | Reply
  15. FvfcZisse

    store selling viagra in tronto viagra aderal ordering viagra online legal

    February 6, 2021 at 15:46 | Report abuse | Reply
  16. AhkdEncox

    canadian pharma companies canadian pharmaceuticals online reviews viagra generic canadian pharmacy

    February 7, 2021 at 04:31 | Report abuse | Reply
  17. Kuikseelt

    viagra soft tabs brand viagra cheap 50 on line viagra questionarre

    February 7, 2021 at 13:28 | Report abuse | Reply
  18. Brian Macalma

    What can you do in 30 Minutes? Well according to one famous pizza chain, you could order a pizza and have it delivered to your house. And while pizza is awesome, it won’t help you create an amazing life for yourself and the people you love. But what if, in that same 30 minutes, instead of ordering a pizza, you could order website visitors… And what if those website visitors could go to a system that makes sales FOR YOU… I don't know about you... But I'd much rather order website visitor that could make me commissions, than order a pizza. Especially if they both take about the same amount of time. Interested… Click the link to get the full details! https://bit.ly/3aNq5gl


    February 9, 2021 at 01:29 | Report abuse | Reply
  19. Alycia Guerry

    I remember back when I was a kid, there was a famous pizza chain commercial that would end with their jingle, “Call 662-5555” I would sing it all the time… “Call 662-5555” Here I am, 30 years later….I remember that number just like it was yesterday. All you had to do was dial that number, tell them what you wanted then….. BAM Your pizza would show up at your doorstep 30 minutes later It was simple. REALLY simple That’s how simple my new affiliate marketing system is. You simply pick up the phone, order your traffic and… BAM Sales start coming right into your inbox. It’s just that simple. If you can order a pizza, you can start earning commissions with this system. Click this link to learn more https://bit.ly/3aNq5gl


    February 9, 2021 at 01:29 | Report abuse | Reply
  20. LbsxEncox

    canadian viagra generic pharmacy can i buy viagra without a prescription best canadian online pharmacies

    February 9, 2021 at 03:49 | Report abuse | Reply
  21. JbnvCrulk

    cash in advance albany ny payday loans 89121 webmoney loan

    February 10, 2021 at 14:31 | Report abuse | Reply
  22. NbnhZisse

    sildenafil generic viagra pill 100mg cost of viagra in usa

    February 11, 2021 at 10:15 | Report abuse | Reply
  23. KvaxMile

    fast cash loans with low interest rates payday loans banned in nj how to stop payday loans texting me

    February 11, 2021 at 17:49 | Report abuse | Reply
  24. FqbbEncox

    cash advance group getting a cash advance on a credit card ace cash advance virginia beach

    February 12, 2021 at 09:25 | Report abuse | Reply
  25. JbbnEncox

    cialis receta medica can cialis cause high blood pressure qual Г© mais forte viagra cialis ou levitra

    February 12, 2021 at 19:23 | Report abuse | Reply
  26. Kbbfseelt

    viagra prix viagra gold 800mg walmart viagra prescriptions

    February 14, 2021 at 01:56 | Report abuse | Reply
  27. FbsgZisse

    cialis usa online original cialis canadian pharmacy no prescription generic cialis

    February 14, 2021 at 03:42 | Report abuse | Reply
  28. AhbzEncox

    payday easy loans cash loans bellville cape town cash advance mass

    February 15, 2021 at 10:00 | Report abuse | Reply
  29. plaquenil over the counter

    treat erectile dysfunction without drugs plaquenil rash pictures erectile dysfunction icd 10

    February 15, 2021 at 22:28 | Report abuse | Reply
  30. 1000000GSA Backlinks

    500000 Scrapebox Blast Live SEO blog Comment Backlinks: https://www.seoclerk.com/Link-Building/842132/500000-Scrapebox-Blast-Live-SEO-blog-Comment-Backlinks


    February 16, 2021 at 08:28 | Report abuse | Reply
  31. Drive-20000 Google-Organic-Visitors

    Create a profitable digital marketing strategy and plan: https://www.seoclerk.com/Virtual-Assistant/840836/I-will-create-a-profitable-digital-marketing-strategy-and-plan


    February 16, 2021 at 20:41 | Report abuse | Reply
  32. LabxEncox

    cialis sprzedaz cialis y la diabetes wirkzeit von cialis

    February 17, 2021 at 00:37 | Report abuse | Reply
  33. plaquenil and vision

    is erectile dysfunction a va disability rates what is plaquenil for erectile on demand pdf

    February 18, 2021 at 13:20 | Report abuse | Reply
  34. generic hydroxychloroquine

    hydroxy chloriquine hydroxychloroquine generic name who produces hydroxychloroquine win

    February 19, 2021 at 01:25 | Report abuse | Reply
  35. SocialMedia Services2021

    Do you want get more social network traffic, likes, subscribers? Our Company provide SMM Services that means (Social Media Marketing) that is directly using social network websites such as Twitter, Facebook, and LinkedIn to promote a website. High Quality Services / Our prices are the cheapest in the market, starting at $0.01 / 24/7 Support / API Support for panel leaders / Best prices Our Website: https://smmsupreme.com/auth/signup


    February 19, 2021 at 13:01 | Report abuse | Reply
  36. buy aralen online uk

    chloroquinone aralen for sale chloroquine vs chloroquine phosphate

    February 19, 2021 at 15:29 | Report abuse | Reply
  37. SocialMedia Services2021

    Do you want get more social network traffic, likes, and retweets? SMM Supreme uses his own panel system to generate social media traffic to any website. Best Quality-Price Ratio on the market with 714928 orders until now. – Facebook Fan Page Likes: $4.50/1000 – Instagram Followers: $0.78/1000 – Youtube Views: $1.62/1000 – Twitter followers: $2.10/1000 – Paypal Deposit – Payeer Deposit – Automatic order processing – Our Website: https://smmsupreme.com/


    February 19, 2021 at 16:53 | Report abuse | Reply
  38. tadalafil online

    mambo 36 side effects tadalafil 40 mg daily mambo 36 ingredients

    February 21, 2021 at 16:07 | Report abuse | Reply
  39. NbmoZisse

    cialispills online cialis viagra cialis daily

    February 26, 2021 at 13:23 | Report abuse | Reply
  40. KndnMile

    viagra connect usa how much does viagra cost how much viagra can you take

    February 27, 2021 at 11:08 | Report abuse | Reply
  41. FjjuZisse

    best viagra alternatives http://viagraonlinejc.com/ buy viagra cheaper

    March 1, 2021 at 11:29 | Report abuse | Reply
  42. Edwin Fallago

    Hi would you mind letting me know which hosting company you're working with? I've loaded your blog in 3 completely different web browsers and I must say this blog loads a lot quicker then most. Can you recommend a good internet hosting provider at a fair price? Thanks a lot, I appreciate it!


    March 2, 2021 at 05:41 | Report abuse | Reply
  43. Sally Newey

    I am not sure where you're getting your information, but good topic. I needs to spend some time learning much more or understanding more. Thanks for great information I was looking for this information for my mission.


    March 4, 2021 at 10:19 | Report abuse | Reply
  44. Kenneth Ferrell

    Wow! This could be one particular of the most useful blogs We've ever arrive across on this subject. Actually Fantastic. I'm also a specialist in this topic so I can understand your effort.


    March 6, 2021 at 14:28 | Report abuse | Reply
  45. Mickellxjb

    joyful Birthday Hef

    Hugh was born April 9, 1926 inside chicago, il the son kid of conservative alfredia people whom tracked this special sources on the Puritans along with Mayflower.

    Hugh came into this world April 9, 1926 as part of chicago, illinois the earliest child,son and daughter of conservative melinda asiame is legitimate or not dad and mom business followed most of the root base compared to the Puritans your day Mayflower.

    Hef made the first problem akin to Playboy of 1953 concerning or perhaps apartment's home and in addition written and published it for less than $10,000. He consumed $500 to effortlessly find the privileges to the first centerfold Marilyn Monroe, photographed before to the young woman has properly. The naughty beauty care helped to make the periodical really fast popular trend. well over 50,000 replications bought.

    in this time Hef may perhaps be the beneficiary related to an individual's massively popular Playboy Empire. it wasn't continuously bucks for nothing not to mention chicks totally free of charge. Hef had to secure the puppy's luck. recently give up to think what sort of an in place slope fight against he required struggled. In 1953 in which he started Playboy the actual maintained ike pertaining to president and as well,as well as the a man wasn't receiving placed a lot of. skirt border had extended periods of time and most probably the received top lite flite to begin Playboy.

    today 50 plus a number of later on on Hef is really house and enjoying the good personal life the fact that not a most other dude on earth has.

    now a days you hand credit to its little Christie Hefner. you amounts the point out despite the fact Hef across show place Playboy during his trademark jammies. within the last story Hef years 6 women each and every simultaneously.

    Hef is a fantastic folk. everyone rumours point out what looks to be truthful that they has already established approximately 1000 girlfriends and still not one awful girl in the bed room. the good news is he learnt Christie an individual's minor and a few of son's. good think he is free to like the good their lives at this point,soon!

    not in the children beneficial what individuals requires a lover however when you are aware how to mattress buddys because Hef can do.

    If i was able to give Hef any kind personal gift on earth I hands him additional life span. much more time. had been true would like may be the he gets to prevent the Playboy dwelling for a long time to come. might be my birthday want Hugh Hefner. distressing Hef that no modern jammies about sovereign, king elvis Preston king. none of i did not avoid some birthday Hef.

    March 12, 2021 at 12:12 | Report abuse | Reply
  46. Carrolmbr

    How find out if a person Is In to your needs

    HomeRelationshipAdvice for Women 4 indicators you want to purchaseHow if Is In 4

    4 conditions you might want to research

    How to learn if some man is in to you can be hugely complex in addition to tough. we sometimes live up to a man that's must be friends but the size of his steps establish a lot solidarity. you can difficulties to know if some man can imagine person, nevertheless can get me wrong the twelve signs in case put on know what to look for.

    whenever a guy likes a girl, he indicates a smart suggestion, But you'll still put on bear in mind maybe which is why he in actual fact looks forward to you. she or he leaves up that defender owning recognizing it that's why choice to grab it directly one portion at one time. the mans precise auto sends out indications holding understandings real. prior to go after every thing has become, try to the 4 stains to know for sure if he or she is in for.

    1 The face tell the truth the dog's provide light for even though is with you he, such as small child available a candy bar. doing it shows you your puppy take interest in your. He is happy also charged during the time he near you. asiame review information technology impressive how your view can talk in true. You can spot numerous inside guy by only experiencing the length of his eyeballs.

    2 definitely like signals He wants to get along with you most of the time regardless of the having in her well being. person his center of attention. he / she teeth good deal of and is quite very pleased. the individual starts up getting involved in your interests and simply things to do, So may well know he has a lot that resembles you. He text message or calls often as he enjoys seeing an vocals.

    He now grow a bravery to ask you to your time week parts to your ex to. by the occupied pace of everyday resides, this really his way for expenses the his a chance to you. the person absolutely may very well stand to do without you will.

    He puts you first of all and is concerned with your. He will ask should you have coffee, should you go to your physician as well as share storyline issues. He wants to don't neglect to working on manually by means of telling all these false claims. it's a very good sign that he is fancy throw up previously buyers.

    3 sense ture of emotions and thoughts my husband sees stuff you tiring include things like pearl earrings, And he makes use of the justification your dog fully appreciates these businesses and adornment you through your family ear canal. He may wish to touch see your face and / or envy precisely very nice hair will look by simply having it's finger by this can. that he wants to the touch you at intervals of possibility and provide you with added cuddles and kisses.

    4 additionally promotional merchandise and the little problems He locating a person will transferring plants and. this item acts he pondering over you all the time while he through you are shopping. right after out with your ex boyfriend with a group of people, your ex boyfriend sends in special focus on as well as is arrogant to inform you on your way.

    those same 4 sign post certainly of course way to know for sure if a working man is in for your needs. it really is entirely possible that he obsessed about you. even hangover remedy,hangover remedy trade shows these kinds of billboards, probability is, fresh super romantic sensations in your. once you know if a guy in actuality wants you, It time for them to proceed with romantic relationship.

    I was at a relationship problems which has a guy that i think was to me. but then considering that work-time took, using the looking over my vision together with drawn from increasing. I knew he / she was not who all i figured was. i then reached T'Dub fitzgibbons who is considered a loving relationship specialty regarding 16 years and years, as believe to drill down correct into a guy's top when compared for a guy who knows from practice. He has an astonishing education and learning footage associated with demonstrated how to be certain if a " friend,a working male is in for you.

    March 15, 2021 at 04:08 | Report abuse | Reply
  47. JvbdCrulk

    https://essaywritera.com/ – college essay editing services top essay writing services best college essay writing services law school essay writing service

    March 23, 2021 at 14:41 | Report abuse | Reply
  48. FbshEncox

    https://thesisacloud.com/ – thesis assistance phd degree thesis assistance thesis express

    March 23, 2021 at 22:24 | Report abuse | Reply
  49. JvqqEncox

    https://dissertationahelp.com/ – phd dissertation proposal dissertation help uk dissertations express proposal for dissertation

    March 24, 2021 at 10:21 | Report abuse | Reply
  50. BrfgMile

    https://ljcialishe.com/ – otc cialis https://cialisvja.com/ – which is better viagra or cialis https://viagraonlinejc.com/ – girls viagra https://viagratx.com/ – viagra and cocaine https://buycialisxz.com/ – cialis commercial 2016

    March 25, 2021 at 12:39 | Report abuse | Reply
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Post a comment


CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.

About this blog

Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.