The gut is known as “the second brain” because it’s second to the brain with nerves, blood vessels, and a lymphatic system. This highway of systems absorbs nutrients, disposes waste, and produces neurotransmitters like serotonin. If there is inflammation in the gut, then other systems in the body are affected. Fatigue, depression, anxiety, joint pain, back pain, and rashes can be traced back to gut integrity. Here is a list of some issues that can come up in the gut.