The people with ample HCl may all be Type Os, as Dr. D Adamo claims. Yet the identification of age- related deficiencies coupled with reports of failing health suggest a gradual decline of HCl over time. If so, HCl deficiency is a preventable and correctable problem, regardless of blood type. Right after this advice, there follows a bizarre recommendation to use gelatin in your food to block the effect of 'those pesky lectins'. In addition to the fact that many people can not use gelatin for religious reasons, in over 6 years of research I have never seen a single study to support this contention.
Type Os find they can eat grains.
Follow these simple, old-fashioned rules and those pesky lectins will be dismantled in your healthy gut and never cause problems in the bloodstream. This is a completely unsupportable statement, with no basis in either basic immunology or molecular biology. I only feel bad for those who read it and think it is rational enough to employ.