Abstract: The present invention provides compositions (for example, nutritional compositions or therapeutic compositions) that comprise a probiotic component, colostrum, a protein component, and a detoxification component. The compositions may further comprise a prebiotic component, a tissue constituent component, a symptomatic relief component, a cellular bioenergetics component, a tissue healing component, and/or an enzyme component. Also provided are methods of preventing or treating a disturbance in the integrity of a tissue barrier and/or a mucosal membrane adjacent to or on a tissue of an individual and preventing or treating resulting diseases or conditions by administering such compositions to the individual.