A dietician I know has spoken about this. Apparently it is very hard to follow and meet nutritional recommendations because of the availability of the foods, and the reduced nutrients in the grown foods now from soil depletion. I think if you were to consider it, it would more be because of a reaction to preservatives etc rather than for weight loss or general health, and you would probably need supplements. For weight loss or general health it would be more sustainable to combine a sensible diet of a range of easily sourced healthy foods and exercise.

Mod hat - And no, I'm not sure that link is ok