Almost any diet can work if you have been eating standard American fare. You can do a lot better then brain-washed vegetarians like Furhman, though.

Here is an example of the kind of thinking you get from him: http://www.diseaseproof.com/archives/diet-myths-do-primitive...

He makes a sweeping conclusion using 2 ridiculous citations. One of is some random website, the other is off-topic (about modernized eskimos, not primitives).