Our bodies actually have 20x the bacteria as living cells as they play a critical role in maintaining a healthy body. It's important to have the right kind of bacteria in sufficient numbers is vital to the healthy functioning of our bodies. Friendly bacteria, known as Lactobacillus & Bifidobacteria work to keep the 'bad guys' in check. Keeping this delicate balance can be easily disrupted by illness, antibiotics, stress, diet, food allergies and travel. Probiotics, therefore, are used to keep this delicate balance of good vs bad bacteria.