Another Peek

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.

Reishi frequently gets prescribed in Traditional Chinese Medicine for its analgesic, anti-inflammatory and anti-arthritic effects. Much recent research appears to validate this traditional use, as the majority of studies have yielded positive results. While looking through published articles on Reishi and arthritis, I found only two studies that showed inconclusive results, both of which were conducted by the same team of researchers. (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)

Several additional papers have been published that summarize positive results in the use of Reishi against arthritis. (15,16,17) One even states that Reishi compares favorably to prednisone, albeit without side effects. (18) On the other hand, a separate study found that supplementing with Reishi helped balance the side effects of prednisolone* that were experienced by some patients, including protein in the urine and cell toxicity. (19) (Prednisolone is the active compound of prednisone, which gets broken down by the liver and converted to prednisolone.)

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 on name confusion: The name “Reishi” is Japanese for the perennial tree mushroom that American naturalists refer to as “Varnished Conk.” In China, it is known as “Ling Zhi.” All these names usually refer to the species Ganoderma lucidum, which for the sake of distinction from other types of Reishi may sometimes be called “Common Reishi” or “Red Reishi.”

Other related species that are often called “Reishi” include: “Hemlock Reishi” (Ganoderma tsugae),” which is common on hemlock trees in eastern U.S.; the Chinese species known as “Black Reishi” (Ganoderma sinense); another American species found on the west coast which is sometimes referred to as “Red Reishi” (Ganoderma resinaceum), although “Red Reishi” more often refers to G. lucidum in contrast to “Black Reishi,” G. sinense; and finally two Japanese species, one that is sometimes known as “Purple Reishi” Ganoderma japonicum, and one without any English name, Ganoderma neo-japonicum.