What are the ingredients in ProBiota 12 sourced from?

Ingredient	Source
Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus paracasei, Lactobacillus rhamnosus, Lactobacillus plantarum, Lactobacillus bulgaricus, Lactobacillus salivarius, Bifidobacterium infantis, Bifidobacterium bifidum, Bifidobacterium lactis, Bifidobacterium breve, Streptococcus thermophilus	Microorganism fermentation media