There are different bacteria strains that go into probiotics. The most popular strains are usually from three main families. They are:

  • Lactobacillus(shortend to L.)
  • Bifidobacterium(shortend to B.)
  • Streptococcus(shortend to S.)

Strains that are most helpful for someone suffering from Irritable Bowel Syndrome are:

  • L. bulgaricus
  • L. reuteri
  • L. plantarum
  • L. casei
  • B. bifidus
  • B. infantis
  • S. salivarius
  • S. thermophilus

There have been specific studies showing benefits with B. infantis &  L. plantarum. So look for these strains when purchasing a probiotic.