Re: My take on soy while hypo..

[Guest guest]

--

> When I asked the endo who was administering my RAI about this - he

> gave two reasons for the 'no soy rule' during LID:

> 1) The use of iodized or sea salt in the manufacturing of soy

> products (it is used to coagualate the milk);

> 2) The possible impact of the isoflavones in soy on the ability of the

> thyroid/thyca tissues to absorb the radioactive iodine.

> Has any one else heard of these explanations?

#1 is new to me (though it makes sense), but #2 is basically what I've

gathered from various places. Soy can interfere w/ thyroid function; we

want any remaining thyroid cells to be fully functional so that they take up

the RAI avidly. So, soy is to be avoided while preparing for RAI. It isn't

an iodine issue, but still--avoid soy while on LID.

The sneakiest place for soy, I think, is in the all-vegetable cooking oils

we often turn to as substitutes for the butter/margarine that are banned on

LID. Read the labels--the oils that proclaim themselves to be

" All-vegetable " on the front often are in fact, when you read the back

label, 100% soybean oil. Of course, the soybean IS a vegetable, but it

isn't an obvious thing, for me anyway.

Nina

geiger@...

[Guest guest]

--

> When I asked the endo who was administering my RAI about this - he

> gave two reasons for the 'no soy rule' during LID:

> 1) The use of iodized or sea salt in the manufacturing of soy

> products (it is used to coagualate the milk);

> 2) The possible impact of the isoflavones in soy on the ability of the

> thyroid/thyca tissues to absorb the radioactive iodine.

> Has any one else heard of these explanations?

#1 is new to me (though it makes sense), but #2 is basically what I've

gathered from various places. Soy can interfere w/ thyroid function; we

want any remaining thyroid cells to be fully functional so that they take up

the RAI avidly. So, soy is to be avoided while preparing for RAI. It isn't

an iodine issue, but still--avoid soy while on LID.

The sneakiest place for soy, I think, is in the all-vegetable cooking oils

we often turn to as substitutes for the butter/margarine that are banned on

LID. Read the labels--the oils that proclaim themselves to be

" All-vegetable " on the front often are in fact, when you read the back

label, 100% soybean oil. Of course, the soybean IS a vegetable, but it

isn't an obvious thing, for me anyway.

Nina

geiger@...

[Guest guest]

-

Hey thyca buds,

My endo and nuclear doc both agreed with your version of why we avoid

soy. It sure does limit the diet, having just finished three weeks

and the RAI but the old thyroid tissue left in my neck sure did suck

up the RAI so it was worth it!

Carol

-- In Thyca@y..., Sharkey <psharkey@u...> wrote:

>

>

>

>

>

> > I do have one comment though...I noticed a lot of the recipies

still

> > say to avoid soy....I wonder..Why?

>

>

> When I asked the endo who was administering my RAI about this - he

> gave two reasons for the 'no soy rule' during LID:

>

> 1) The use of iodized or sea salt in the manufacturing of soy

> products (it is used to coagualate the milk);

>

> 2) The possible impact of the isoflavones in soy on the ability of

the

> thyroid/thyca tissues to absorb the radioactive iodine.

>

> We go on the LID so that the thyroid & thyca cells get 'hungry'

> for iodine and then take a nice big gulp when we take our treatment

> dose. Soy products may interfere with the iodine absorbtion.

>

> Has any one else heard of these explanations? My endo really

> doesn't believe in the LID and I always wondered if his opinion

> re soy was shared with others who actually advocate the LID.

>

>

>

> dx pap-Hurthle cell variant, tt 9/99, RAI 100 mCi 12/99

[Guest guest]

>

> > I do have one comment though...I noticed a lot of the recipies

still

> > say to avoid soy....I wonder..Why?

>

>

> When I asked the endo who was administering my RAI about this - he

> gave two reasons for the 'no soy rule' during LID:

>

> 1) The use of iodized or sea salt in the manufacturing of soy

> products (it is used to coagualate the milk);

>

> 2) The possible impact of the isoflavones in soy on the ability of

the

> thyroid/thyca tissues to absorb the radioactive iodine.

>

[Guest guest]

Sea salt or calcium salts are used to coagulate the soy proteins to make

tofu, not to make ordinary soy products. These start out as a cake left after

the oil has been pressed out.

Tofu should definately be avoided as a potential iodine-containing food

(depending on the amount of iodine in the sea salt, and how much is left

after coagulation).

I am not certain as to how important the isoflavone issue is with THYCA

patients.

Ian

> > I do have one comment though...I noticed a lot of the recipies still

> > say to avoid soy....I wonder..Why?

>

>

> When I asked the endo who was administering my RAI about this - he

> gave two reasons for the 'no soy rule' during LID:

>

> 1) The use of iodized or sea salt in the manufacturing of soy

> products (it is used to coagualate the milk);

>

> 2) The possible impact of the isoflavones in soy on the ability of the

> thyroid/thyca tissues to absorb the radioactive iodine.

>

> We go on the LID so that the thyroid & thyca cells get 'hungry'

> for iodine and then take a nice big gulp when we take our treatment

> dose. Soy products may interfere with the iodine absorbtion.

>

> Has any one else heard of these explanations? My endo really

> doesn't believe in the LID and I always wondered if his opinion

> re soy was shared with others who actually advocate the LID.

>

>

>

Ian Adam

Radiation Safety Officer

The Institute of Cancer Research

Cotswold Road

Sutton

Surrey

SM2 5NG

Tel: 020 8722 4250

Fax: 020 8722 4300

EMail: iana@...