Hot water extracts of Coriolus Versicolor are one of the most effective and best selling immune support supplements in the world, and the most widely used immune support supplement in Japan.*
The immune health benefits of hot water extracts of Coriolus have been verified in hundreds of studies and multiple human clinical trials, making Coriolus Versicolor one of the most thoroughly researched medicinal mushrooms ever studied or used for immune support.*
The NIH is currently funding a seven year study on Coriolus versicolor at Bastyr University in Seattle Washington. This study started out using an unextracted Turkey Tail mushroom supplement made by another U.S. based mushroom company for the first eighteen months, but dropped that unextracted supplement from the study in 2010 and replaced it with PSK, a hot water extract of Coriolus versicolor made in Japan.
Mushroom Science’s Coriolus Super Strength formula is carefully prepared with a multistep hot water extraction process, and delivers the same concentration of immune supporting polyscaccharides as the PSK tested in the highly regarded Japanese research (also known as Krestin, or Polysaccharide K).*
Starting in 1994, Mushroom Science was the first company to offer a Coriolus extract that did match the potency of the PSK used in the Japanese research (a.k.a. Krestin). We use the N.M.R. image from the U.S. manufacturing patent for PSK, a molecular fingerprint, to ensure we are offering our customers the exact same extract used and sold in Japan under the brand name PSK or Krestin.
Mushroom Science is still the only company offering a Coriolus versicolor supplement matching the potency of the PSK used in the Japanese and U.S. research. In other words, you will not find a more potent Coriolus (Turkey Tail) supplement available for purchase.
There are some companies claiming that PSK and PSP can only be extracted from the mycelium (the vegetative stage), and not from the mushroom (the fruit body), however, this is not true. In the original U.S. Patent filed on the extraction process for making PSK (now expired), the inventors make the following statement; "The term "fungus belonging to the Coriolus genus" used herein is to be understood as referring to the fruit bodies and/or mycelia of the above mentioned species of fungi" (U.S. Patent 4,229,570, Oct. 21, 1980).
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*These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.