A number of studies have shown that turkey tail mushrooms have immune boosting properties.
For example, its extract may be useful in fighting certain types of cancer, according to one 2014 reviewTrusted Source.
The researchers looked at studies of five types of mushroom, including turkey tail, as complementary cancer treatments. They conclude, “The evidence base for using mushrooms in cancer treatment has greatly increased.”
However, none of these studies recommend any mushroom extract as a standalone treatment. Instead, the researchers have found that these extracts may have benefits for people who use them alongside treatments such as chemotherapy.
Turkey tail mushrooms contain compounds called polysaccharopeptide (PSP) and polysaccharide-K (PSK). PSP and PSK Trusted Sourceappear to inhibit the growth of cancer cells.
Some evidence suggestsTrusted Source that PSP may also have the ability to stimulate the immune system, especially when combined with other anticancer treatments.
Researchers have isolated the PSK compound. In Japan, PSK is an approved adjuvant cancer treatment, according to the National Cancer InstituteTrusted Source.
However, the Food and Drug Administration (FDA) have not approved the product for this use in the U.S.
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