Are Devil Fruit users weak to salt? The weakness of Zombie of Thriller Bark is salt.


  When salt is thrown into a zombie's mouth, the shadow moving the corpse is detached and the zombie is purified. Because salt is a property of sea water and since the shadow was attached due to a Devil Fruit power, the shadow is naturally released.


If Brook nullified Moriah's Devil Fruit power with salt, does this mean no Devil Fruit user can eat salt?
No, this is just the special weakness of that particular Devil Fruit.

I mean, Luffy eats everything, nearly everywhere. And in the most dishes there is salt, or how do you cook you spaghetti?

Another instance to prove my opinion is that Luffy had gone underwater several times and had nearly drowned. In the process, he also "ate" salt, but it had no effect, like losing his Devil Fruit power.