1But does it really work?
YES.

To illustrate the point consider our experience from thousands of clients: Although members of the same family all eat the same foods, their bodies react differently. In our experience one blood type is clearly more predisposed to developing ulcers while another is more predisposed to cancer

One blood type group thrives on exercise with another avoiding it more. One blood type group gains weight much sooner than the other – all this while eating the same foods. Also, each blood type group has their own distinct vitamin and mineral deficiencies.
The evidence is overwhelming. Blood type group diet is very effective. And there are many to choose from, but we found that many of them do not consider other health aspects like blood sugar control and maintaining a pH balance to mention but two very important factors. So we improved the diet to be much more comprehensive yet allowing much variety to allow sustainability.