'Tasteless' in the Bible

Can tasteless [food] be eaten without salt, or is there taste in the white of a marshmallow plant?

"You are the salt of the earth. But if salt becomes tasteless, by what will it be made salty? It is good for nothing any longer except to be thrown outside [and] trampled under foot by people.

"Now salt [is] good, but if salt becomes tasteless, with what will it be made salty?