Probiotics are the good bacteria that line your digestive tract and support your body’s ability to absorb nutrients and fight infection. There are actually 10 times more probiotics in your gut than cells in the rest of your body. Your good bacteria is also responsible for crowding out bad bacteria, and creating enzymes that destroy harmful bacteria. When there is an imbalance in your gut from low levels of good bacteria, it becomes a breeding ground for viruses. The only way to replace the essential good bacteria in your body is to eliminate foods that feed bad bacteria and start consuming probiotic-rich foods and probiotic supplements.