Swanson EpiCor is a new type of dietary additive that can hardly be classified as it is known for a remarkably wide spectrum of activity. It is produced by a fermentation process which takes place in several steps and is known as MetaGen4. Completely natural nutritional yeast is used. This process enables the formation of high-metabolite immunogens that nourish and strengthen the body's immune system to enhance its stability and well-being. Extensive research and safety of this remarkable substance make it a great daily tool for maintaining and improving health. Try it, it is incredible!