IgGI Shield™ combines ImmunoLin® with N-acetyl-D-glucosamine to support the structure of the cells of the intestinal lining and to promote a healthy inflammatory response in the cells of the gastrointestinal (GI) tract. These ingredients work together to provide support to the intestinal barrier and to support gut immune health. ImmunoLin®, a serum-derived bovine immunoglobulin concentrate (SBI), is the only purified, dairy-free source of immunoglobulin G (IgG) available as a dietary supplement. Immunoglobulins play an integral role in the support of healthy immune function at the gut and systemic levels. N-acetyl-D-glucosamine promotes healthy immune function by promoting a balanced immune response.