SBI Protect CapsulesCompare to Pure Serum Defense Capsules by Purely Integrative SBI Protect is the only purified, dairy free source of immunoglobulin G (IgG) available as a dietary supplement. Pure IgG helps to maintain a healthy intestinal immune system by binding a broad ranges of microbes and toxins within the gut lumen. CLINICAL APPLICATIONS Provides Concentrated Immunoglobulins to Enhance Mucosal Immunity Helps Maintain Microbial Balance Supports GI Barrier Health