L. acidophilus can be helpful to us in many ways.  There are many recent studies suggesting that it can help to treat many diseases and disorders.  They are taken in supplements to replace the probiotic, meaning “helpful”, bacteria in your gastrointestinal tract.  Studies have shown that it can aid digestion, and treat diarrhea.  It also can improve lactose digestion in those who are lactose intolerant.  More recent studies have shown that it may enhance the immune system, but more research is needed to back up those results.  Another recent study has shown that it may aid in treatment of respitory infections, like bronchitis, but more research is needed for those results too.