Dear Dr. D'Adamo,

Please excuse my sending this to your e-mail address, but I have a very limited web-browser, and I just spent 30 minutes trying to post this question to your message board, without success.

I was intrigued by the section in your book where you mention that wheat and corn interfere with insulin metabolism in type O people. I also follow the zone diet recommended by Barry Sears, which is based on carefully controlling insulin levels in the body.

How exactly do the lectins in wheat and corn interfere with insulin? Do they tend to increase insulin resistance, and therefore lead to an increase in insulin levels in the body? If so, then Dr. Sears would suggest that there would be a wide range of negative effects, in addition to the problems with weight loss that you mention. It is interesting that in Sears second book entitled Mastering the Zone, he mentions that he believes people
with type O blood are the most susceptible to problems with insulin, and therefore will benefit the most dramatically from the zone approach. Are you familiar with his ideas, and would you agree with his assesment of the need for type Os to carefully control insulin responses in the body?

Finally, are there any other foods that also interfere with insulin response in people with type O or any of the other blood types?

Thank you for providing this opportunity to get questions about the blood type diet answered. I think it is great that you are posting these inquiries and the answers for everyone to refer to. Keep up the good work.

Sincerely,
Dan Erway, derway@aztec.asu.edu