Reishi extract has been used in Traditional Chinese Medicine to treat arthritis and other forms of inflammation for over 2,000 years. Also commonly known by its Latin name as “Ganoderma,” or Chinese “Ling Zhi,” Reishi is by far the most searched medicinal mushroom on the Internet with over 200,000 searches per month. And although it may not be the panacea (”cure-all”) that some hold it to be, the fact that modern research confirms it as an inflammation modulator may help explain why it has long been heralded as such in the Orient.

In fact, Chinese medical practitioners have been prescribing Reishi extract for ages in cases of arthritis, bronchitis and other conditions involving any type of inflammation. Modern research in Asia as well as in America and Europe confirm the validity of these uses. Out of 19 papers used for this article, 17 reported positive results in the use or Reishi extract for arthritis. Only two were studies were inconclusive, both of which were conducted by the same research team. (1,2)

An American study conducted in 1993 by Lin et al. concluded that a water extract of Ganoderma lucidum (Reishi) demonstrated “significant anti-inflammatory activity.” (4) A study out of India ten years later found that an extract of Reishi decreased inflammation in conditions of acute edema and chronic edema by 56% and 60%. (3) Seven additional research papers were found during the writing of this article that all concluded that Reishi is a potent anti-inflammatory medicinal mushroom. (5,6,7,8,9,10,11)

Next we'll be looking at some studies that more directly relate to the use of Reishi extract with arthritis. A paper published in 2006 by Blum et al. claimed to provide supporting clinical evidence demonstrating that use of Reishi extract for joint health was both safe and effective. (12)

The same year, another study summarized findings that Reishi in combination with a Chinese herbal remedy known as San-Miao-San demonstrated a positive “immunomodulatory effect” on rheumatoid arthritis. (13)

The mechanism through which Reishi achieves this beneficial effect on arthritis was suggested in a study the following year, 2007, by Ho et al., which states that GL-PP [Ganoderma lucidum polysaccharide peptide] significantly inhibited the proliferation of RASF [Rheumatoid Arthritis Synovial Fibroblasts] (14)

A number of other studies also report positive findings for using Reishi extract with arthritis (15,16,17) One of them even reports favorable results in comparing Reishi with prednisone, and without the side effects. (18) Furthermore, a different study found that supplementation with Reishi extract actually helped to balance the side effects of prednisolone experienced by some patients, including proteinuria and cell toxicity. (19) (Prednisone breaks down in the body to form prednisolone, which is the active compound.)

In conclusion, the body of research does seem to support the use of Reishi extract in cases of arthritis. Remember that it is important to always work with a licensed medical practitioner when using any herb for medicinal purposes.

Note: “Reishi” is the Japanese name on the mushroom known in English as “Varnished Conk.” It actually encompasses several closely related species, the most common of which is Ganoderma lucidum (Common Reishi or Red Reishi). This species can be found in the U.S. but is much more common in South East Asia. It is also well known by its Chinese name, Ling Zhi.

Several closely related species of Ganoderma also go by the name of “Reishi”. Most common of these are the Hemlock Reishi (Ganoderma tsugae) found on Hemlocks in the Appalachian Mountains, and the Chinese species “Black Reishi” (Ganoderma sinense). Less common are Ganoderma resinaceum (sometimes called “Red Reishi,” although that name is more often used for G. lucidum), Ganoderma neo-japonicum (no common name other than “Reishi”), and Ganoderma japonicum (Purple Reishi).

For over 2,000 years, Reishi extract has been used as a “cure-all” herbal remedy in Chinese Medicine, with the oldest written record of any medicinal mushroom in Shen Nong’s Herbal Classic. Although it may not be totally accurate to claim that Reishi extract cures everything, traditional as well as modern use indicates that it may be a powerful anti-inflammatory agent in a large host of conditions, including arthritis.

In fact, Chinese medical practitioners have been prescribing Reishi extract for ages in cases of arthritis, bronchitis and other conditions involving any type of inflammation. Modern research in Asia as well as in America and Europe confirm the validity of these uses. Out of 19 papers used for this article, 17 reported positive results in the use or Reishi extract for arthritis. Only two were studies were inconclusive, both of which were conducted by the same research team. (1,2)

A U.S. based study conducted in 1993 showed that a water extract of Ganoderma lucidum (Reishi) exhibited “significant anti-inflammatory activity.” (4) Ten years later, an Indian research paper was published which stated that the use of Reishi extract helped decrease inflammation in acute edema by 56% and in chronic edema by 60%. (3) Using the “Article References” link on this page, you will find references to seven additional research articles that confirm Reishi extract as a powerful anti-inflammatory agent. (5,6,7,8,9,10,11)

Other research has been conducted on Reishi extract that relate specifically to arthritis. In 2006, Kenneth Blum et al. published findings in support of both the effectiveness and safety of using Reishi extract for “joint health,” providing “clinical evidence” to back up their claim. (12)

Also that same year, a Chinese study by Xi Bao et al. came to the conclusion that Reishi plus another medicinal herbal remedy commonly used in China seemed to have a “beneficial immunomodulatory effect” on arthritis. (13)

The answer as to how, precisely, Reishi extract accomplishes this “immunomodulatory effect” may have been given by another Chinese study the following year, which states that an isolated Reishi polysaccharide peptide “significantly inhibited” RASF, which is an indicator of rheumatoid arthritis. (RASF stands for “Rheumatoid Arthritis Synovial Fibroblasts.”) (14)

Five additional studies are included in the references that report positive findings between Reishi and arthritis. (15,16,17) One goes so far as to state that Reishi shows favorable results when compared to prednisone, and is free from the side effects. (18) In extension of this, a separate study also found that not only was Reishi extract free of the side effects of prednisone, it could also help balance the existing side effects of prednisolone* such as cell toxicity and proteinuria. (*Prednisolone is the active compound of prednisone. The liver breaks down prednisone and converts it to prednisolone.) (19)

In conclusion, the majority of research on the use of Reishi extract for inflammation or arthritis appears to support its effectiveness. Please remember that it is very important to always consult a licensed medical doctor before using any herb for medicinal purposes.

Note: “Reishi” is the Japanese name on the mushroom known in English as “Varnished Conk.” It actually encompasses several closely related species, the most common of which is Ganoderma lucidum (Common Reishi or Red Reishi). This species can be found in the U.S. but is much more common in South East Asia. It is also well known by its Chinese name, Ling Zhi.

Several closely related species of Ganoderma also go by the name of “Reishi”. Most common of these are the Hemlock Reishi (Ganoderma tsugae) found on Hemlocks in the Appalachian Mountains, and the Chinese species “Black Reishi” (Ganoderma sinense). Less common are Ganoderma resinaceum (sometimes called “Red Reishi,” although that name is more often used for G. lucidum), Ganoderma neo-japonicum (no common name other than “Reishi”), and Ganoderma japonicum (Purple Reishi).