Well, if you go with the French Gender Diet, they are all about the salt for boys and don't allow nuts because they have magnesium in them.
In my High Everything Diet, I think nuts are ideal for blue and I know for a fact that they don't sway pink because I used to eat 1/2 c nuts every morning for breakfast for several years and conceived 1 boy and then another boy soon after while swaying pink while the nutty goodness was still in my system.