You have probably heard of “leaky gut” and the importance of protecting the intestinal lining. But did you know your brain has its own version of a protective shield? This remarkable structure, the blood brain barrier, acts like an elite security system allowing only essential nutrients and oxygen to pass into the brain while blocking harmful substances. When this barrier is healthy, it helps your brain maintain sharp thinking, stable mood, and healthy aging. When it is compromised, your whole body experience the effects.