High-Metaboite Immunogens. Enhances Immune System Function. Epicor is a natural immune-supportive compound that fits into the unique category of being a high metabolite immunogen. Epicor is a nutritive dried yeast fermentate that supports cellular metabolism and modulates immune function. It is derived from the yeast Saccharomyces cerevisiae, a non-pathogenic yeast commonly used in baking and brewing. In vitro laboratory data has shown that Epicor beneficially influences cellular processes that impact immune health. High Metabolite Immunogen that Modulates Immune System Function. Shown to activate Natural Killer (NK) cells in vitro.