ALPI (intestinal alkaline phosphatase) is a brush-border enzyme expressed in the gut that plays a critical role in maintaining intestinal homeostasis. By dephosphorylating pro-inflammatory microbial products, it helps prevent bacterial translocation and systemic inflammation. Dysfunction or deficiency of ALPI is linked to conditions such as increased intestinal permeability, metabolic disorders, and inflammatory diseases, making it a promising therapeutic target for preserving gut health.