Probiotics help the GI tract, the urinary tract, and the immune system, among other systems. Probiotics populate the GI tract by the trillions, where they help digest complex carbs, free up valuable nutrients, may help assist your body’s natural immune system, and help maintain a proper pH balance. They directly compete with harmful bacteria for dominance in the intestines, which helps provide a barrier of resistance in one of the most vulnerable parts of the body. They’re also helpful in creating immune antibodies, which help alert immune cells to the presence of pathogens. And after all that help, probiotics even help to take out the garbage, meaning they help support waste elimination in the colon.