Eat Right 4 Your Type®

Official Website Of Dr. Peter J. D'Adamo & The Blood Type Diet®

The D'Adamo Forums

The Forums, which have functioned in one way or another since 1996, have now been closed to new posting.
However there is a wealth of accumulated wisdom that can be searched for and utilized, so we've archived the messages.
Join our new forum on Facebook, the Eat Right 4 Your Type Group.

Main Forum Page  ♦   Search  ♦   Older Archives   ♦   Admins
BTD Forums    Diet and Nutrition    Eat Right 4 Your Type  ›  Blood Type O, Iodine & Brazil Nuts
Users Browsing Forum
No Members and 17 Guests

Blood Type O, Iodine & Brazil Nuts
  This thread currently has 6,085 views.
Print Print Thread
1 Pages 1 Recommend Thread
Thursday, July 12, 2012, 12:38pm Report to Moderator Report to Moderator
Guest User
I've recently become interested in the Blood Type diet (I am O+ I don't yet know my secretor status).

Looking at the Blood Type O diet from a perspective of Thyroid function and Iodine foods, there are a lot of connections. As Dr. D'Adamo writes "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."

Therefore hardly surprising to find foods high in Iodine, foods from the sea, such as Kelp & Cod as beneficial for Type Os. (see

It also follows that goitrogens, foods that block iodine absorption, are avoids. Such as Peanuts and Soy

What I find slightly odd is that Brazil nuts, a food high in selenium, "selenium helps to convert iodine into the thyroid hormones and Vitamin A is also important for the proper functioning of the thyroid gland" are an avoid for Type Os.

I'm concerned about thyroid function and it was very satisfying that the blood type diet and a diet to help thyroid function fitted together so well it's just slightly annoying that brazil nuts don't fit that pattern! Should I eat them or shouldn't I?

Life doesn't have to fit together and make sense, but it's nice when it does

thank you

E-mail E-mail
Thursday, July 12, 2012, 12:51pm Report to Moderator Report to Moderator

Le(a- b-)
Autumn: Harvest, success.
Posts: 208
Gender: Female
Location: Lorraine, France
Age: 42
Hi Idiopathic,

if you look here you'll see that brazil nuts are an avoid for Type O because of other reasons: "Flocculates serum or precipitates serum proteins."

So it seems that brazil nuts aren't well digested by Type O's and should therefore be avoided, regardless of thyroid function they're not beneficial for your bloodtype.

Happiness is the highest form of wisdom.

ENFP / Pisces sun, Scorpio moon, Capricorn ascendant.
Private Message Private message Reply: 1 - 3
Thursday, July 12, 2012, 1:00pm Report to Moderator Report to Moderator

55% Gatherer, ISTJ, Reactor worldview
Autumn: Harvest, success.
Posts: 291
Gender: Female
Location: Just north of London, England
Age: 61
At a guess, the answer lies in the fact that thyroid function isn't the only thing being taken account of on BTD - there's probably some other reason why brazil nuts are not a good move, which outweighs their selenium benefits.  A number of the protein sources available on the O diet are pretty good sources of selenium.

  • Toyed with BTD from 2006
  • Diagnosed with IBS Jul 2011
  • SWAMI start Dec 2011
Private Message Private message Reply: 2 - 3
Friday, July 13, 2012, 11:36am Report to Moderator Report to Moderator
Guest User
Thank you both for your replies, I will look at other sources of selenium
E-mail E-mail Reply: 3 - 3
1 Pages 1 Recommend Thread
Print Print Thread

BTD Forums    Diet and Nutrition    Eat Right 4 Your Type  ›  Blood Type O, Iodine & Brazil Nuts

Thread Rating
There is currently no rating for this thread

Need Help?

Contact D'Adamo Personalized Nutrition customer service for support on where to begin.


Personalized Living

A Daily Webzine Celebrating The Wonder Of Individuality & The Blood Type Diet®

Archive | Signup | Blog

Become a Patient

Center of Excellence in Generative Medicine (COEGM) is Dr. D'Adamo's main clinical facility. To schedule an appointment please visit:

The statements made on our websites have not been evaluated by the FDA (U.S. Food & Drug Administration).
Our products and services are not intended to diagnose, cure or prevent any disease. If a condition persists, please contact your physician.
Copyright © 2015-2018, Hoop-A-Joop, LLC, Inc. All Rights Reserved