blood type diet is the anti lectin diet and this is where Dr Gundry get's his cues from

Q: You mentioned lectins in the blood, what do you think of Dr. D’adamo with his blood type diet…. there’s no study on it but do you have a take?

A: His original thinking was that he set up a paper tiger to knock it down, because the vast majority of people are type O. Isn’t it interesting that the type O diet is the best selling diet and easiest to manipulate. But there’s a couple of recent papers that show that Enterocytes (gut cells) have blood group antigens detection on them. So I want to give him his due. He may be far ahead

http://selfhacked.com/2015/12/11/dr-gundry-turning-off-autoimmunity...