I’m- Yunity® is made from the Coriolus versicolor mushroom with active ingredient PSP (polysaccharide peptide), which is a safe herb that has been well documented in the Compendium of Materia Medica (link to www.imyunity.com) to enhance immune functions in both humans and animals. In addition to the findings from the UPenn study, people who have used this product reported that their pets appeared more active, better appetite and shinier fur.