A disadvantage related to the type of food that can be processed lies in the presence of fat globules.
A food that has fat globules can be troublesome to effectively heat ohmically, as it is non-conductive due to lack of water and salt (Rahman 1999). If these globules are present in a highly electrical conductive region where currents can bypass them, they may heat slower due to lack of electrical conductivity. Any pathogenic bacteria that may be present in these globules may receive less heat treatment than the rest of the substance (Sastry 1992).