thumb|Trametes versicolor, the mushroom from which PSK was isolated. Polysaccharide-K (Krestin, PSK) is a protein-bound polysaccharide isolated from the mycelium of Trametes versicolor.
thumb|Trametes versicolor, the mushroom from which PSK was isolated. Polysaccharide-K (Krestin, PSK) is a protein-bound polysaccharide isolated from the mycelium of Trametes versicolor.
Although PSK is approved in Japan as an adjuvant therapy in cancer treatment, it is not approved in the United States for treatment of cancer or any clinical condition.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).