An adapter insert is for the purpose of reinforcing or stiffening a flexible adapter for said guard system to provide greater support and stabilization in the peristomal region in an effort to help reduce herniation, and to help aid adhesion of a faceplate when worn short term without a guard when output is expected to be minimal, for instance, between meals. The conjoined insert and adapter are positioned between a faceplate and a pouch, their inner apertures surrounding the faceplate flanges or heat weld of an ostomy appliance, and worn under form-fitted clothing negating the need for a security strap.