Probiotic Complex has 4 billion probiotic organisms per capsule. Probiotics are micro-organisms that are a good form of bacteria. The digestive system usually includes both ‘good’ as well as ‘bad’ bacteria, which needs to be balanced to maintain optimal health. Lactobacilli and bifidobacteria are two probiotics that are most widely studied, and are both included in Probiotic Complex (lactobacillus acidophilis and bifidobacterium longum). Thus, Probiotic Complex helps to maintain healthy digestive function.