Circa Turkey Tail
Trametes versicolor is among the most scientifically validated medicinal mushrooms available. Its two primary polysaccharide compounds — Polysaccharide-K (PSK, also known as Krestin) and Polysaccharide-P (PSP) — have been the subjects of hundreds of clinical studies, particularly in Japan and China. PSK has been approved as an adjunct immunotherapy for cancer treatment in Japan since 1977, representing one of the most significant clinical validations of any mushroom compound. Beyond its immune applications, Turkey Tail's prebiotic polysaccharides make it a powerful gut health ingredient, supporting the microbiome and the gut-immune axis.
