Lentinula edodes (Berk.) Pegler which is also called shiitake belongs to Pleurotaceae, Agaricales and Bas' diomycetes. Lentinula edodes is regarded as a good health-promoting fungus that is rich in protein and short of fat. Modern researches find that it has an effect on anti-tumor, anti-virus, inducing interferon and protecting the liver, etc. Further studies indicate that it is lentinan whose molecular weight ranges from 400,000 to 1,000,000 that has an anti-tumor effect. But this kind of lentinan will not be absorbed easily through oral administration, so it is often directly injected to the body. Common lentinan may trigger a variety of side effects because of the deficiency in purity. For this reason, our company introduces advanced technology to extract and purify lentinan and eventually develop the lentinan that can be used for injection. Detections show that the lentinan produced in our company has a purity of more than 98%. Its molecular weight ranges from 400,000 to 800,000.

We use Lentinula edodes fruit body as raw material and then extract, purify and refine it many times to get lentinan. It is a kind of off-white color powder and absorbs moisture easily. Its molecular structure is showed as below.