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February 13 2000
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Soy Formulas and the Effects of Isoflavones on the Thyroid

 

Environmental scientist and long-time campaigner against soy-based infant formulas, Dr Mike Fitzpatrick, has warned about the risk of thyroid disease in infants fed soy formulas, high soy consumers and users of isoflavone supplements:

"There is potential for certain individuals to consume levels of isoflavones in the range that could have goitrogenic effects. Most at risk appear to be infants fed soy formulas, followed by high soy users and those using isoflavone supplements".

The report noted that infants fed soy formulas are exposed to high levels of isoflavones, which are potent anti-thyroid agents, and that the risks to normal growth and development were significant.

Fitzpatrick stated that thyroid problems due to soy might not be recognised "due to difficulties in establishing a cause and effect relationship" and noted that even experienced soy researchers may be ignorant of the connection between isoflavones and goitre.

Fitzpatrick also rejected claims that there was no evidence that isoflavones in soy formulas harmed infants citing the reported cases of goitre that have occurred in infants fed iodine sufficient soy formulas.

Fitzpatrick stated his support to the position of the New Zealand Ministry of Health:

"The Ministry of Health has found that infants with a history of thyroid dysfunction should avoid soy formulas and soy milks. Additionally, there is potential for isoflavone exposure to cause chronic thyroid damage in all infants fed soy formulas" Fitzpatrick stated that exposing infants to isoflavones was unnecessary and that the risk of harm could be avoided if manufacturers removed isoflavones from soy formulas. "In the interim" he stated "it is appropriate for medical practitioners to monitor the thyroid status of infants fed soy formulas"

Fitzpatrick also claimed that high soy consumers and users of isoflavone supplements were also at risk of thyroid disorders. He stated that the subtle effects of anti-thyroid agents on thyroid function would most likely be evidenced as subclinical, or even overt hypothyroidism.

Fitzpatrick also noted that a sporadic pattern of soy use may also not be without risk since the resulting thyroid stimulation parallels the classic method for inducing thyroid tumours in laboratory animals. He recommended "a more cautionary approach to the use of soy and isoflavone supplements".

New Zealand Medical Journal (Volume 113, Feb 11, 2000)



Dr. Mercola Dr. Mercola's Comments:

Folks, soy formula is one of the worst foods that you could feed your child. Not only does it have profoundly adverse hormonal effects as discussed above, but it also has over 1000% more aluminum than conventional milk based formulas.

I don't recommend either, but if one, for whatever reason, cannot breast feed, then Carnation Good Start until six months and Carnation FollowUp after that seem to be the best commercial formula currently available. The milk protein is hydrolyzed 80% which tends to significantly decrease its allergenicity.

It is also important to note that when breast feeding it is wise to avoid drinking milk as it has been shown for several decades that the milk will pass directly into the breast milk which can cause potential problems in the infant.

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Community Comments ( 11 )
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ravezac
[ Joined on 03/08 ] [ Posted on March 28, 2008 ]
1 Points        
   
 
Novice User

My daughter was on soy formula after 6 mo. because I could no longer nurse. (The soy was at the advice of my mother.) She is now 12yrs old. She has Hashimoto Thyroiditis, outrageously high levels of aluminum, and manganese, as well as mercury. She also has 3x the normal amount of estrogen. Now I find out soy is not the super food it was supposed to be! How do I reverse the damage?

 [ Reply ]
Mercola
  
Susan Devo
[ Joined on 06/06 ]  [ Posted on October 7, 2008]
       
   
Novice User
  Mercola

I am sorry this has happened to you. I am also another that ended up with Hashimotos and Hypothyroidism because of the soy I ate, and drank as a vegetarian for over 10 years back in the 80's and 90's. I purchased a FAR INFRARED SAUNA to detox the heavy metals. I sought out the help of a Brimhall Chiropractor and we used a low level laser (Cold laser) on my thyroid and also, ionic cellular detox foot baths to detox the heavy metals. I am careful to replace my minerals and supplements and do not detox too quickly, and drink more water than I want to look at in a day or it can make you pretty sick feeling. It took a long time to get this way, it will take a bit to get rid of it. (I continue this to this day) and in a short time, my thyroid remembered how to function on it's own. I changed my way of eating by taking Dr. Mercola's nutrition type test and am still working on it. Google Brimhall or join Mercola's inner circle and see what they have to say. I just had a cardio ion panel done, my metal toxicity (and plastic levels) are much improved. I feel better and have more energy especially since eating the way Dr. Mercola recommends for my nutrition type. Susan

  
  
size8jeans
[ Joined on 09/08 ] [ Posted on September 4, 2008 ]
       
   
 
Novice User

I was recently diagnosed as hypothyroid.  I do NOT have Hashimoto's so they don't know what caused my thyroid to go wacky.  I think it's likely the high soy diet I followed.  I was low-carbing and many low-carb products use soy - soy flour, soy protein, soy concentrate, etc.  It totally sucks because I *love* soy. I can't give it up entirely, but I have cut WAY back.  My doctor just started me on levothyroxine (synthetic T4 hormone) to try to get my free T3 and T4 levels up and my TSH down.

 [ Reply ]
  
  
Nobsy
[ Joined on 05/08 ] [ Posted on September 4, 2008 ]
       
   
 
Novice User

Sadly, folks, if you would like an answer to your questions - you are going to have to search the web or join Dr. Mercola's "Inner Circle".

While this is a good site for "opening one's eyes", you really need to search for answers for your very important questions. You just get the "trailer" here.

I, too, have serious thyroid problems and in my menopause years consumed large quantities of soy and took a "natural" soy formula pill for relief. I don't know if there is a connection and The JAMA insists their studies say "no" but I am a realist. I don't believe everything I read - even if it is from a doctor.  Doctors make huge errors, every minute of every day. Because we've been taught to depend on them for our very life - we sometimes forget they are human.  

Thank you, Teakvass, for the link.

 [ Reply ]
  
  
angie14208
[ Joined on 10/07 ] [ Posted on July 24, 2008 ]
       
   
 
Novice User

my son, now 25, was fed soy formula,at 6 yrs old developed juvenile diabetes, but he always craved lots of milk too, and sweated profulsey as a toddler, dont know if any of this connects, just thought id comment,

jain999ATLive.com

 [ Reply ]
  
  
Teakvass
[ Joined on 03/08 ] [ Posted on July 24, 2008 ]
       
   
 
Novice User

I find this article both interesting and not useful - or rather, incomplete. I recommend that interested readers check out the research and articles done by the Weston A. Price Foundation on breast-feeding. Here is a link: www.westonaprice.org/.../index.html It makes sense to me that nursing mothers drink (best quality) milk, both for their babies' and their own health!

Thank you.

 [ Reply ]
  
  
MommaofaBunch
[ Joined on 06/06 ] [ Posted on July 24, 2008 ]
       
   
 
Novice User

There is a deep divide in the health food community on soy.  Aside from the thyroid affects, the phyto-estrogen affects are still present.  Soy just should not be an infant formula on the market today.  I was a soy baby, I have a strange subclinical hypothyroid status 30 years later (maybe less, it's hard to say exactly when I shut down).  

My son was on soy and I didn't like it, however, then there were no other options to dairy protein intolerance (not to be confused with lactose intolerance).  Lactose free formulas had "just" hit the market and were of no use to us.  So far he appears okay, but he has some disturbing things going on I have yet to get on simply due to my own health over the last 2 years.

When loosing weight on a major weight loss plan, I consumed soy.  As a nursing mom, I consumed soy thinking it was a good thing.  A few years later I'm hypothyroid with no family history and just plain weird lab results.  I am not classical hypothyroid or secondary.  It took a doctor who treats symptoms and not labs to get me the help I needed to start the recovery process.

When I had trouble feeding my last son (due to hypothyroid status, it nixes milk supply), I gave him hypoallergenic formula.  It costs more, but I was not going to expose him to soy period.

Even I was not convinced 100% that soy is a bad thing.  Today, there are 3 things I will not consume Soy, HFCS and Gluten.  My husband and children are all Celiacs, medically confirmed biopsied Celiacs.  

My answer is consume at your own risk.  Temphe is probably okay in moderation.  Americans consume soy in much higher quantities than Asian counter parts for the most part.

BTW - Gluten proteins pass into Breast milk as well.  Pub Med studies prove it exisit, even if top Celiac doctors do not want to believe it happens.

 [ Reply ]
  
  
Scotty/Sioux City
[ Joined on 02/08 ] [ Posted on March 27, 2008 ]
       
   
 
Novice User

Nobody has replied to this query nor the previous query... perhaps this is not a widely read article.  Too bad.  There is so much pressure by the AMA for doctors to ABLATE thyroids with Radioactive Iodine (RAI) for all thyroid disorders... hyper or hypo... which really makes us thyroid sufferers desperate for alternative treatments.  I do not want to spend the rest of my life determining how much synthroid and cytomel I need to take to be normal, nor do I want to spend the money for 3 or 4 endo appointments a year if I can restore my God-given thyroid to normal function.  I just need to slow it down.  Also, they never tell you that RAI ablation will most likely make the eye problems (Graves Ophlamopathy) worsen.  Soy milk, I repeat, does not affect they thyroid, from my esperience-- possibly due to heat in the production process.  The anti-thyroid isoflavanoids in the brassica vegetable family, as well as soy sources, is very fragile and is destroyed by heat--  reference TEXTBOOK OF NATURAL MEDICINE, by Joseph Pizarno.  

if you want to reply individually, my email address is JHaberer@cableone.net... I would appreciate any advice or common experience.  Thank you, Stuggling-to-keep-my-thyroid-Scotty

 [ Reply ]
  
  
Julieanne
[ Joined on 06/07 ] [ Posted on March 7, 2008 ]
       
   
 
Novice User

Lecithin is a product made from soybeans, regarded as a health food. Is this now taboo? Or is it a different process?

 [ Reply ]
  
  
Scotty/Sioux City
[ Joined on 02/08 ] [ Posted on March 6, 2008 ]
       
   
 
Novice User

I have Grave's Disease, hyperactive thyroid.  I have tried using soy-milk as an anti-thyroid treatment... drinking as much as a gallon a day.  I experienced absolutely no relief from this.  Then, I learned, anti-thyroid isoflavanoids, like those present in cabbage, broccoli, soy, etc, are destroyed by cooking.  I suspect that soy milk, soy formula, and other products from soy, are processed by cooking or pasteurizing.  Do you think this is the reason I got no relief from the soy milk?  Scotty/Sioux City

jhaberer@cableone.net

 [ Reply ]
Mercola
  
fardan
[ Joined on 07/08 ]  [ Posted on July 23, 2008]
       
   
Novice User
  Mercola

for hyperactive thyroid, are you finding that you are gaining weight, Are you on any kind of medicine?  If so, what.  Is this medicine helping?  If so, how.  


 
Truste
 
Mercola