No, different probiotics serve different body systems and function in different ways. Probiotics are described by their genus (e.g., Lactobacillus), their species (e.g.,rhamnosus) and their strain (e.g., GG). This degree of specificity in describing a probiotic is essential since functions can be strain-specific. For example, Lactobacillus rhamnosus GG may have different effects from L. rhamnosus GR-1.