Polysaccharide peptide (PSP) is a protein-bound polysaccharide extracted from the Coriolus versicolormushroom, the most well researched medicinal mushroom. It is the active ingredient of I’m-Yunity. I’m-Yunity contains 400mg per capsule. Each capsule contains 38% or more of Polysaccharide and 11.5% or more of Peptide.