Leaky gut is a condition where the gut barrier becomes damaged and the intestinal wall becomes permeable, allowing harmful substances to leak into the bloodstream. The body detects these as “foreign” invaders and coordinates an immune response. Over a longer period of time, this can manifest in allergies, skin flare ups, headaches and migraine, autoimmune diseases and even impact mood and cognition. Probiotics play a critical role in maintaining a healthy gut barrier function.