A specialty soy fiber, Polysoy, is derived during the extraction process that is manufactured for use as an ingredient in fertilizers for mushrooms.

Polysoy is a complex matrix of cotyledal carbohydrates (i.e. insoluble fiber and soluble fiber) and protein. The composition provides Polysoy with unique properties such as controlling moisture migration; thereby, making Polysoy a reliable source for moisture and uniformity in soils and media.