Immunum™ Base Formula Euglena Gracilis The Immunum™ proprietary blend includes Euglena Gracilis, a whole cell, natural algae, containing multiple immune stimulating agents, including linear beta-1, 3-Glucan. Linear beta-1, 3-Glucan is the most efficient form of beta-glucan for binding with immune activating receptors in the body. This novel, first-to-market immune stimulating algae provides broad spectrum immune system priming, which goes well beyond beta-glucan alone. Spirulina extract Immunum™ includes a proprietary Spirulina extract, which acts as a potent adaptive immune stimulator with both activating and resolving activity. Researched and discovered in the United States, the Spirulina fraction contained in Immunum™ complements the activity of Euglena Gracilis, providing a powerful combination not available anywhere else.