What is a probiotic?
A probiotic is any supplement containing one or more species of beneficial bacteria intented for human consumption. Probiotics are good bacteria that promote healthy structure and function of your digestive tract and immune system.
Most probiotic supplements use probiotic bacteria of human origin, typically from the Bifidobacterium or Lactobacillus species. Other bacteria, such as those from the Bacillus and Staphylococci families, can be probiotic in nature as well.
The soil-based probiotics (SBO) designation is for bacteria that is not of human origin but may confer probiotic benefits.