Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Fungi have a long history of use in traditional medicine systems, particularly in East Asian practices such as Traditional Chinese Medicine (TCM). In these traditions, various unspecified fungi—most notably species like Cordyceps, Reishi (Ganoderma lucidum), and Poria (Wolfiporia extensa)—are believed to support kidney health and function. For example, Cordyceps is often described in TCM as a "kidney tonic" and is used to address symptoms believed to be related to kidney deficiency, such as fatigue, lower back pain, and urinary issues. Poria is another fungus frequently included in TCM formulas for kidney and urinary tract support. However, when considering "fungus (unspecified)" rather than specific, well-studied types, the evidence for kidney support is rooted primarily in tradition rather than modern scientific validation. Most of the purported benefits are based on historical texts, anecdotal usage, and the philosophical frameworks of traditional medicine, rather than controlled clinical trials or biomedical research. While there are emerging studies on particular fungi that suggest possible kidney-protective effects—such as antioxidant activity or potential to reduce certain markers of kidney damage—these studies are generally preliminary, use isolated extracts, and are not representative of all fungi. Overall, the use of unspecified fungus to support the kidney body system is primarily justified by tradition, with limited scientific substantiation.

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