Mushroom Immune Defense™ 15-Mushroom Complex Source Naturals Mushroom Immune Defense™ is a blend of mushroom mycelia and extracts from 15 of the most well-studied species of health-supportive mushrooms. Although the exact mechanisms of action in the body are not yet fully understood, researchers propose that constituents of these mushrooms may support natural killer (NK) cell, T-cell, and macrophage activity, and cytokine production. By carefully combining these mushrooms and fortifying them with extracts, Source Naturals Mushroom Immune Defense offers a broad-spectrum, high potency, complete mushroom product.* Tablet Option Available: 30, 60, 120 Suggested Use: 1 to 2 tablets twice daily between meals. Allergies: Suitable for vegetarians. Contains no yeast, dairy, egg, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.