The role of the vehicle/filler substances in delivering functional benefits also has to be taken into account. Some effects may not be reproduced using a different vehicle/filler—for instance, due to reduced viability of the strain. A probiotic strain is identified by the genus, species, and an alphanumeric designation. In the scientific community, there is an agreed nomenclature for microorganisms—for example, Lactobacillus casei DN-114 001 or Lactobacillus rhamnosus GG (Table 3).