Probiotic products must be identified to what taxonomic level?

• A. Genus
• B. Species
• C. Family
• D. Strain

Answer: (D)

Probiotic effects are specific to the individual strain, so products must be identified at the strain level. Different strains within the same species can have distinct properties—how they interact with the host, their survivability through processing and gut passage, and the specific health benefits or risks they impart. A genus, species, or family label is too broad to guarantee the same effect or to support precise regulatory labeling and clinical evidence. Recording the exact strain allows for reproducibility, accurate safety monitoring, and proper linkage to studies that demonstrate the product’s intended benefits. That’s why strain-level identification is required.