This diet is well intentioned, but it lacks scientific evidence to support its claim that we should be regulating what we eat by our blood types.  It is hard to determine whether this would be a healthful diet to follow, as there are no recommended meal plans – you merely select what to eat from a list based on your blood type, so that you can avoid the appropriate “protein lectins”. 

For example, if you are a Type AB, you should be eating tofu rather than red meat.  We think this plan would be very difficult for most people to maintain.  But mostly, we just found the explanations behind this diet to be too implausible. You would do better by just winging it and making up your own plan. Bottom line: don’t spend your money on this.