PSP is an abbreviation of 'PolySaccharoPeptide': now in general known as 'proteo-glycan'. ORIVeDA's PSP-50 is identical to the original PSP as it was developed in China, over 25 years ago. In itself PSP is an improved version of the well-known Japanese PSK, which is even older. PSP is chemically identical to but structurally different from the
Japanese PSK (PolySaccharideKureha), which is marketed and sold under
the brand name Krestin in Japan.
ORIVeDA's PSP-50 has been cultivated and extracted using the original methods. The only difference is a significant higher purity due to the more advanced 21st century pharmaceutical techniques. Only pure COV-1® mycelium (the 'roots' of the mushroom) was used for the extract, having the highest level of the desired bioactives.
The quality marker for hot water extracted Turkey Tail is beta-glucan.
Turkey Tail contains two types of beta-glucan, which are in part linked to peptides to form bioactive glyco-proteins / proteoglycans. To be in line with the research a Turkey Tail extract should preferably be based on a specific deep layer cultivated mycelium strain (COV-1) of the mushroom. "Deep layer cultivated" means "cultivated in liquid" as opposed to rice/grains. The advantage is that there is no left-over substrate in the final product, it is pure mycelium, starch-free. This method is only used in Asia.
This product is similar in function (and with a higher PSP percentage)
to the I'm Yunity supplement for dogs, (at a much more reasonable price.)