The gut is naturally permeable to very small molecules in order to absorb these vital nutrients. In fact, regulating intestinal permeability is one of the basic functions of the cells that line the intestinal wall. Factors such as infections, toxins, stress and age can cause these leaky gut symptoms.
When your gut is leaky, things like toxins, microbes, undigested food particles, and more can escape from your intestines and travel throughout your body via your bloodstream. Your immune system marks these “foreign invaders” as pathogens and attacks them.
General signs include: Chronic fatigue, Food allergies, General/seasonal allergies, Joint pain, Arthritis, Skin rashes (related to inflammation), Nutritional deficiencies (improper absorption), Weakened immune system (from overexertion) etc.