Defense Plus Contains 250mg of Citricidal GSE extract, along with the extracts of Echinacea, Astragalus, Reishi Mushroom, Maitake mushroom, Shitake mushroom, Ginger root, GoldenSeal, Yarrow, Zinc, and Meta-C(water-processed, buffered vit. C) The old name for this product was "Maximum-Strength GSE".