If you made a mezones on anything , are you yotzei bedeved. Is this true ,is this only be certain foods. Where is source for this
Yes this is true, and it applies to all foods with the exception of water and salt. The reason for it is because the bracha borie minei mezonos means that Hashem created different types of food that give sustenance, which applies to all foods except for water and salt, which don’t satiate at all. It is the opinion of the Chayei Adam 586-3, and it is brought in the Biur Halacha 167-10 D:H B’makom.