even so, that in itself doesn't prove that a paleo diet is only suitable for the first 25 years
anyway the 25 years is speculative and an average anyway. given that so many died in the first few years the mean deviation would be quite substantial
also, it strikes me as quite logical that a different (even if only slightly) diet at different times in one's lifespan where requirements change, makes sense
as clint says it doesn't have to be something taken to religious extremes
at the end of the day it is probably horses for courses, but i agree with od that most dieticians don't have a good track record nor all the answers