New and Improved Complete Probiotics has two highly researched strains of beneficial bacteria -- Lactobacillus and Bifidobacterium.* Plus, it adds multiple highly beneficial strains to give added support to your digestive system*. More Solid Reasons Why The New and Improved Complete Probiotics is My #1 Pick Maintains your ideal "good" to "other" bacteria ratio by promoting the optimal environment for the growth of good bacteria* Supports your production of B vitamins, especially folic acid and biotin, and vitamin K* Promotes mineral absorption for you* Supports your protein and carbohydrate digestion via probiotic enzymes* Aids your metabolism and the breakdown of toxins* Helps you maintain appropriate bowel transit time* Supports your immune system function by helping you remove toxins* Produces lactic acid for your support of digestive processes and colon pH balance* Helps you maintain serum lipid and blood pressure levels in the healthy range* Supports your normal immune response* Helps promote your oral health*