I started this thread to share the research I've done on why my SWAMI is classifying cabbage, cauliflower and brussles sprouts as avoids for me when they are generally considered to be nutritional powerhouses with anti-cancer properties. Other cruciferous veggies like kale and broccoli are classesd as superfoods. What differentiates them? I am sharing because I learned a HUGE amount that I wish I had known 20 years ago.
According to this page on the Whole Foods website, http://www.whfoods.com/genpage.php?tname=george&dbid=250
, they contain isothiocyanate compounds called glucosinolates that can interfere with the production of thyroid hormone in those individuals "with known dietary deficiency of iodine or selenium or both" especially when combined with the isoflavones in soy.
Both of these compounds, glucosinolates and isoflavones, are called 'goitrogens' because they can cause the development of goiters in some individuals.
According to Dr. D: Type O’s tend to have low levels of thyroid hormone and often exhibit insufficient levels of iodine, a chemical element whose sole purpose is thyroid hormone regulation. This causes many side effects such as weight gain, fluid retention and fatigue. Dr. D’Adamo does not recommend iodine supplements, rather a diet rich in saltwater fish and kelp to help regulate the thyroid gland.
The Whole Foods webpage goes on to say, "With respect to diet, the most common cause of goiter is iodine deficiency from lack of iodine-containing foods. However, other food factors can come into play under certain unique circumstances. For example, since the mineral selenium is required for certain activities within the thyroid gland, selenium deficiency can combine with borderline iodine deficiency to produce goiter."
For me, this information is especially poignant because, when I switched from table salt to Kosher salt many years ago, my iodine intake dropped.
Over the summer, I gained 4 pounds for no apparent reason. Looking back, though, I had increased my consumption of both cabbage and cauliflower and was frequently eating them raw (coleslaw is so good in the summer). Cooking appears to lower the availability of isothiocyanates but fermenting does NOT which is probably why sauerkraut as also an avoid for me.
I have always had a tendency to retain water which I assumed was due to hormones/cycle. When I get a migraine, I frequently notice that the gloves I use to wash dishes are very hard to remove presumably because my hands are swollen. Then, when I take the pill to alleviate the pain (Maxalt) I have to pee every 10 minutes.
Could increasing my intake of iodine solve both these problems?????
Foods rich in iodine, http://www.globalhealingcenter.com/natural-health/iodine-foods/
, are sea vegetables, Himalayan sea salt, cranberries, organic yogurt, navy beans, organic strawberries, raw dairy products, and potatoes.
I've been using Himalayan sea salt for about 3 years and raw dairy including yogurt for two. Kelp and bladderwrack, thankfully and understandably, are superfoods for me as are cranberries and peaches. Strawberries and dairy are both avoids.
But, I digress.
Cabbage, cauliflower and brussels sprouts are commonly called goitrogens. Goitrogens include broccoli, Brussels sprouts, cabbage, cauliflower, kale, kohlrabi, rutabaga, turnips, millet, spinach, strawberries, peaches, watercress, peanuts, radishes, and soybeans.
If isothiocyanate compounds are the reason cabbage, cauliflower and brussles sprouts are classed as avoids for me, then the others should be as well. Of the foods listed above, here's how they are rated in my SWAMI (beneficial
, Brussels sprouts, cabbage, cauliflower,kale, kohlrabi, rutabaga, turnips, millet
, spinach, strawberries, peaches, watercress, peanuts,radishes
Of the 17 items listed only 6 are avoids; the rest are either beneficial or neutral. So WHAT is it about cabbage, cauliflower and brussles sprouts that makes them so dangerous for me?????
When I Googled "which blood type should not eat cabbage" I found this EXCELLENT article which, in reviewing the BTD book, answered some of my questions http://www.buzzle.com/articles/o-negative-blood-type-diet.html
. It's written for O- blood types but many of the explanations apply to all Os.
According to Madhura, "cabbage, brussles sprouts, and cauliflower hinder thyroid hormone"
while "kale and broccoli are high in vitamin B needed for efficient metabolism".
I don't know whether this information is in the BTD book because the questionnaire indicated that the GTD would be more suited to me.
So, apparently, the vitamins in kale and broccoli trump the goitrogens for me
But, on this website, http://www.healthalternatives2000.com/vegetables-nutrition-chart.html#Broccoli
, brussles sprouts are higher in B vitamins than both broccoli and kale. So what gives?
IF glucosinolates are the reason for the avoid rating -- I have not had confirmation from Dr D
-- then 1) why can't the TYPEbase say "goitrogens inhibit thyroid hormone
" instead of "known disease modifier" and 2) why not give me the option of increasing my iodine consumption; or, better yet, being tested to see if I need to?
The Whole Foods website, http://www.whfoods.com/genpage.php?tname=george&dbid=250
, goes on to say that, "For the vast majority of individuals, foods containing potentially goitrogenic substances pose no documented health risk to the thyroid and can be included on a daily basis in a balanced diet. For individuals with known dietary deficiency of iodine or selenium or both, especially when combined with previously diagnosed thyroid problems, intake of soy foods and cruciferous vegetables may need to be discussed with a healthcare practitioner."
I have made an appointment with my doctor to have my thyroid evaluated. If necessary, I will add kelp and bladderwrack to my diet.
, cautions that too much iodine can be toxic. They also warn that "kelp naturally contains organic arsenic and may cause arsenic poisoning when exceeding the recommended amount. Researchers evaluated nine different kelp products and found that eight contained unacceptable levels."
Maine Coast Sea Vegetables makes a granulated kelp flavored with either cayenne or garlic that can be sprinkled on soups or salads. They state that "Our Kelp for granules is sustainably harvested and certified organic by QAI. We also voluntarily test for heavy metals, herbicides, pesticides, PCB's, fuel oil, and microbiological contaminants."
They also sell bladderwrack powder that can be added to juice or smoothie.
I prefer not to use a capsule because I'm trying to decrease the amount of capsule material, fillers, binders and flow regulators I'm consuming.
This Whole Foods article, http://www.whfoods.com/genpage.php?dbid=95&tname=nutrient
, indicates that "Brazil nuts are one of the most concentrated food sources of selenium, featuring about 70-90 micrograms per nut
", but they are avoids for me. I suspect it is a mold problem (they frequently taste moldy to me) but I will start a new thread for them.
Other food sources of selenium are button mushrooms, cod, shrimp, tuna, halibut, salmon, and mustard seeds. All but the mushrooms are either superfoods or neutral for me.RECAP of what I learned
Type Os tend to have low levels of thyroid hormone and iodine
Cruciferous vegetables can exacerbate this problem for them
Selenium is used by the thyroid and low levels can also exacerbate the problem
Underactive thyroid can cause bloating and fatigue (I knew about the weight gain)
Sea vegetables (kelp, bladderwrack, et al) are high in iodine
Iodine supplementation can cause toxicity
Kelp supplements can contain arsenicBottom line for me:
I will eliminate the avoids until I have had my thyroid tested.