Currently, there are four predominant ways to source and culture Lactic Acid Bacteria. These sources are:
Plant based strains
Dairy based strains
Soil based strains
Human based strains
Leading researchers in the fields of microbiology and bacteriology have determined that dairy based, soil based and human based strains of LAB cultures are not entirely safe from mutation when introduced to the human GI tract*.
* Tannock, Gerald W., Probiotics: A Critical Review, Horizon Scientific Press, January 1999.
