Out of Korea comes a new and increasingly popular medicinal mushroom known as Phellinus linteus. It does have a rarely used English common name, Black Hoof Fungus. But you are more likely to hear it referred to by its Japanese name as Mesima.
Phellinus linteus grows on hardwood trees such as oak, poplar and mulberry. The species is common in Southeast Asia and southern parts of the United States. [1]
Most medicinal mushroom species used today in America came to us via China or Japan. Phellinus linteus is a break from this trend, as it first became popular in Korea where it’s commonly used to complement traditional cancer treatment.
From Korea, its reputation has spread like wildfire around the world. Doctors across the globe are now beginning to use it as an immune booster [2-11], and especially for preventing cancer metastasis. [5,10,12-17] Apart from Korea, Phellinus linteus is particularly popular in Japan, the U.S., and the Middle East from Israel to Turkey.
It may have all began when a 1996 Korean study reported that Phellinus linteus extract exhibited a broader range of immune enhancing and anti-cancer properties than the extracts from other species of medicinal mushrooms. [4]
World renown American mycologist Paul Stamets took this a step further when he published research in 2003 which compared seven of the world’s most popular medicinal mushroom species, including Reishi, Cordyceps, Maitake, Chaga, Lion’s Mane and Agaricus blazei. [18]
Phellinus linteus had a stronger effect than any of them on the part of the immune system known as macrophages. The activity of this type of white blood cell increased by 5,700% when Phellinus linteus extract was administered in an amount equivalent to 3,750 mg for an average size adult (165 lbs). [18]
Macrophages as part of the human immune system can be a two-edged sword. They may devour cancer cells, but can also stimulate cancer growth. The published research on Phellinus linteus indicates that it activates the cancer-fighting properties of macrophages, not the cancer-stimulating properties. [8,14,19,20]
Additional reports have been published on cases of “spontaneously” regressed cancers, where the patients reported having used Phellinus linteus by their own choice:
1. A Japanese article from 2004 reported a “dramatic remission of hormone refractory prostate cancer achieved with extract of the mushroom, Phellinus linteus.” [15]
2. In 2005, a Korean paper related the case of a 65-year-old patient with liver cancer and skull metastasis who experienced “spontaneous regression” after one and a half years of using Phellinus linteus. [17]
3. And then one year later, in 2006, another Japanese article was published on “a case of spontaneous regression of hepatocellular carcinoma with multiple lung metastases.” The 79-year-old patient had been taking an extract of Phellinus linteus Mycelium for a month. When examined by his doctor 6 months later, his tumors had disappeared. [16]
Note: The information in this article is not intended to cure, treat, or diagnose any illness. The article is for entertainment and informational purposes only. The fungus Phellinus linteus has not been approved in the United States for use as a pharmaceutical. Always ask a licensed medical practitioner before using any substance as medicine.

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