NOW&ampreg; Clinical Probiotic Immune&amptrade; is a combination of L. acidophilus NCFM&ampreg; (predominant strain) and B. lactis Bl-04&ampreg;, two clinically validated probiotic strains that help to promote a robust, balanced response to immune system challenges. A growing body of scientific work has demonstrated that the Gastrointestinal (GI) tract plays an essential role in healthy immune system function and that resident gut microflora are an integral part of that function. Both of the acid-resistant strains in this formula are known to support digestive health, while NCFM&ampreg; may also help to support a healthy insulin response through its positive influence on the GI tract.*