http://www.chasefreedom.com/eatrightforyourtype.html
Gives the "pro" for this diet. Also a link to the con. Bear in mind, you aren't trying to "diet" - that is, lose weight, but trying to metabolize protein. Obviously, any protein is better than pure sugar, or fats. But, you do need some fats and carbs for balanced nutrition, but usually that's not hard to get.
But, if you can fine tune it, so much the better. Fish and vegetable protein might be best. You can make complementary protein with beans and rice.