IgG GuardIgG Guard is purified, dairy free source of immunoglobulins (IgG) that provides the highest IgG concentration available for GI and immune challenges. Pure IgG helps to maintain a healthy intestinal immune system by binding a broad range of microbes and toxins within the gut lumen. IgG Guard rapidly heals inflammation in the gut caused by food, bacterial imbalances (dysbiosis), autoimmune conditions, or infections. It can be used to treat Leaky Gut.