Disclaimer: ††An IPSOS 2023 survey among US functional medicine practitioners, in an average month, Designs for Health is their personally most trusted practitioner supplement brand, meaning a brand that is sold by healthcare practitioners in their office. ††An Ipsos 2023 study among a random sample of 160 functional medicine practitioners including Doctor's of Osteopathic Medicine, Pharmacists, Acupuncturists, Athletic Trainers, Personal Trainers, Fitness Trainer/Coaches, Chiropractors, Integrative Medicine Specialists, Naturopathic Doctor, Homeopaths, Medical Doctors, Physical Therapists, Nurse Practitioner/Physician Assistants, Registered Nurses, Nutritionists, Massage Therapists, Occupational Therapists and Dieticians that are aware of Designs for Health and recommend supplements to their patients. 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.