We are at the very beginning of a new way of thinking concerning foods and their effects on our body.
We are, for the most part coming from a society that thinks in terms of black/white/good/bad, and this, I believe, has us at a disadvantage in this way of thinking.
We are all a little bit confused. By way of analogy, I used to imagine that finding the pieces to heal my auto-immune disease was like assembling a jigsaw puzzle. We didn't know how many pieces this puzzle had, or even if they were all in the box. There was no clear deliniation as to how the pieces fit together. When-ever I thought I'd answer one question, two more would appear in it's place.
Now, with the Blood Type eating plan as a foundation, or table, so to speak, slowly, over time, the pieces of the puzzle are being assembled and taking form.
OK, what does that have to do with the immediate question?
Peter used a combination of techniques and criteria in determining whether what category to put a food into. Weight gain/weight loss, while at the forefront of many people's thinking, are a secondary reaction, a symptom if you will, of a healthy or sick endocrine system. Our goal is to rebuild that system if it is ill, or keep it strong if it is currently healthy.
So the question: Do I (put your name here) avoid or include a particular food in my diet?
I recommend the following steps:
*) Establish a baseline of where you are today. If possible, have a live blood cell or darkfield microscopic exam of your blood.
1) Use the basic diet recommendations as found in the book and the website.
2) Spend the time culling the website. You will find information that is applicable to your situation.
Over the next several months, the rest depends on where you are starting from, healthwise.
3) If you are getting the results you want, keep going. If not, start making refinements, such as a complete serotype profile from Rockwood Labs. Keep in mind that the diet recommendations used by Dr. Kruzel are also in 'new status.'
4) If you are not getting the results you want, change something. Eliminate something. The only thing I'd advise against is including something from your bloodtype 'avoid' list.
The most important thing is to exercise your personal power and ability to educate yourself and change as the situation calls for it.
I hope all this philosophy hasn't been too confusing. I realize that you asked for some concrete answers, and I give you a lot of philosphy.