Many ancient healing systems rely on food as the first form of medicine, and mushrooms may well be some of the first nutraceuticals, or functional foods, known to man. In many traditional cultures from, China to Scandinavia to Brazil to Australia, mushrooms play an essential role in lore, medicine and diet. Not all mushrooms are edible, and not all are therapeutic but lucky for us, several well-documented species are recognised for their incredible health benefits, especially for their bolstering effect on the human immune system. The mushrooms we are talking about are often tree mushrooms, sometimes culinary mushrooms and are all ancient medicines that are still relevant in modern times. We call the medicinal mushrooms and we are excited to share some of the world’s most incredible fungi with you.
The Asian medical system has long-held reverence for mushrooms as functional foods and powerful herbs, and the first known herbal pharmacopeia in China, theShen Nong Ben Cao Jing, includes many species of mushroom still known today. This book also gives us the foundation of tonic herbalism via the classification system of superior, regular, and inferior herbs. To tonify, we typically work with superior and regular herbs, leaving out the more potent (and dangerous) inferior herbs, and we look to nourish, support and rebuild the body on an energetic and physical level.
Tonification (Bu Fa) is a therapeutic treatment that nourishes and replenishes theQi,Blood,Yin andYang of the human body when they are deficient or weak. It may be that one particular organ system requires tonification, or perhaps the body as a whole. From a TCM perspective, mushrooms generally act asQi tonics and function to tonify the Lung and Spleen channels, though many are also supportive of other organs like the Liver, Heart and Kidneys.
Through the Western lens, all medicinal mushrooms contain complex polysaccharides (including beta-glucans) that positively challenge the immune system, strengthening and modulating its function. For this reason, we tend to prefer to use them as prophylactics, for general immune support, and in a healthy diet, rather than treating acute symptoms (with some exceptions).
Immune support is not all mushrooms can do - as Marchand and Stewart (2018) note, "Mushrooms also have a number of other properties, including antifungal, antibacterial, antiviral, and tumour attenuating." Mushrooms are prebiotic and help produce M cells (which control antigens and microbes) in the intestinal lining (Halpern, 2007). They also contain potent antioxidants, each mushroom producing enzymes that eliminate free radicals and reduce the oxidative damage caused by modern life (Cruz et al., 2016).
Time to explore some of the medicinal mushrooms held in the highest esteem by ancient and modern herbalists… perhaps we'll discover your next fungal ally!
To sayGanoderma lucidum (also known asling zhi) is revered in China is an understatement - the only herb contesting its position as "most valuable player" isPanax ginseng.G. lucidum regularly features in images of Daoist heaven and in the esoteric Daoist tradition,G. lucidum is revered as a longevity herb and for its ability to tonifyShen. AShen tonic is a herb that calms the 'Spirit';G. lucidum's use in cases of insomnia, depression and nervous conditions is well documented (Willard, 1993).
Modern Chinese medicine practitioners reach forG. lucidum to assist with supporting the liver, lowering blood pressure, supporting immune function, reducing inflammation and as a nervine and cardiotonic.
As famous asG. lucidum is as a traditional medicine, it became a lot more famous when it was discovered by Asian scientists thatG. lucidum is rich in polysaccharides, specifically beta-glucans that elevate immune function. Also discovered were secondary metabolites called triterpenoids which were present in significant amounts. These lipid-lowering and antioxidant triterpenoids (Wachtel-Galor et al., 2011) setG. lucidum apart from all the other medicinal mushrooms and are one of the reasons we use dual-extracts, as these compounds are soluble in ethanol. Triterpenoids giveG. lucidumextracts their bitter flavour; in TCM the bitter taste supports the Heart, the organ that house theShen.
Traditionally, consumption ofG. lucidumhas always been in extract form, either as a water or dual-extract (ethanol and water). This is because the tough chitinous cell walls of the mushroom make it largely indigestible, even when ground to a fine powder. An extract is the ideal way to consumeG. lucidum.
Shaped like a glossy red heart (or liver, depending on your perspective),G. lucidum is a polypore, a tree-borne fungus that emits a spore-producing fruiting body (effectively the genitals of the mushroom). This fruiting body is the part used traditionally, though modern mycologists are also harvesting the mycelium of cultivatedG. lucidum. Our preference is to work with the fruiting body.
Best in: decoction, broth, double-extraction tincture, powdered double-extract
Coriolus versicolor is a beautifully striated polypore found in temperate forests on all continents except Antarctica (have a look in your own backyard, or nearby nature reserve; it is highly likely there is some residing there!). LikeG. lucidum,C. versicolor is woody and nigh impossible to ingest raw - it is best taken in (dual) extract form. The most rigorously studied of all mushrooms, several human studies support the use ofC. versicolor for cancer prevention and as an adjunct treatment to bolster the immune system after immunosuppressive treatments.
In the Daoist tradition, due to its affinity for growing on pine trees,C. versicolor was revered for its longevity (conferred by the pine) and as a Yang tonic (it is said that it harvested Yang energy from the roots of the tree).C. versicolor is sweet and bland in flavour and slightly cold in nature, meaning C. versicolor mainly manifests its therapeutic actions in the Spleen, Lung and Liver meridians. It is also known in TCM as a herb to replenishJing (Essence) andQi and for general immune support.
Best in: broth, decoction, powdered double-extract, double-extraction tincture
This flavourful mushroom is a mainstay in the Japanese diet and is highly regarded for its nutritional qualities. It is the second most cultivated mushroom in the world (after white button mushrooms, of the genusAgaricus, which also happen to be medicinal powerhouses). As Halpern (2009) states, "Even among mushrooms, shiitake is high in nutrition: it contains all the essential amino acids, as well as eritadenine, a unique amino acid that some physicians believe lowers cholesterol. Shiitake is also high in iron, niacin, and B vitamins, especially B1 and B2. In sun-dried form, it contains vitamin D.”Lentinula edodes is especially rich in leucine and lysine. It also contains over 30 different enzymes. L. edodes is also rich in polysaccharides.
In the 1970s the Japanese mushroom industry conducted extensive research into the nutritional and medicinal properties of L.edodes. As withC. versicolor, a polysaccharide fromL. edodeswas isolated, lentinan, a pure beta-glucan. This compound was developed into a drug utilised as a complementary treatment in Japanese oncology. Research has shown that patients receiving chemo-immunotherapy using lentinan have better outcomes than those receiving standard chemotherapy (Ina et al., 2013).
Unlike its friendsG. lucidum and C. versicolor,L. edodes is perfectly edible in its whole form. However, in order to consume a medicinal quality of L. edodes, it is best consumed in extract form; generally, a water extract is sufficient. L. edodes is considered a balanced tonic in TCM, with a neutral flavour that acts on the Stomach/Spleen.
Best in: food, broth, powdered extract
The most popular mushroom amongst bio-hackers today, revered for its capacity to increase cognitive enhancement and encourage nerve repair, has humble origins as a Spleen tonic and culinary mushroom in traditional Asian medicine (and as a styptic in Native America). In traditional Chinese medicine,Hericium erinaceus is used for stomach disorders, ulcers, and gastrointestinal ailments.H. erinaceus is prescribed as a nutritive tonic that nourishes the enteric nervous system - our theory is that the improvements in cognition and function observed by the modern health scene is due to its function in supporting gut health and the middle brain (if you carefully observe aH. erinaceus mushroom, its hairs look like the intestinal villi.)
Chinese medicine sees the body as containing three areas of brain-like function, also known asDan Tiens. The LowerDan Tiencontrols reproductive function and primal power, the Middle our digestive capacity and ability to manifest and the Upper our higher spiritual self in full expression, clarity and harmony of thought, speech and emotion. Through the lens of traditional Chinese medicine,H. erinaceus tonifies the middle burner and supports all five organs to harmony. This could correlate to the cognitive enhancement reported by those consuming this mushroom.
Modern research has shown thatH. erinaceus' major active components are beta-glucan polysaccharides, which stimulate macrophage activity and possibly provide neuroprotection by preventing cell apoptosis (Park et al., 2002).H. erinaceus also contains polyketides and terpenoids, compounds that have been found to stimulate nerve growth factor (NGF) synthesis (Wang et al., 2015). There is much excitement about the potential of this mushroom to treat Alzheimer's disease (Thongbai, et al., 2015). There is also signs thatH. erinaceuscould be supportive for dementia patients; a double-blind, parallel-group, placebo-controlled trial gave Japanese men aged 50 - 80 years 3g doses of powderedH. erinaceus each day. The group showed significant improvement on the cognitive function scale compared to the placebo group (Mori et al., 2009).
Of the terpenoids, one is found in the fruiting body of the mushroom, hericenones and the other, erinacines, is found in the mycellium ofH. erinaceus - both promote the production of NGF (Bing et al., 2010). The area of research into mycelium extracts and their benefits is promising, and while traditional use was always limited to the fruiting body, modern mycologists like Paul Stamets are now growing mushrooms on a rice-based substrate which allows them to harvest the mycelium. There is some concern that grain-grown mushrooms lack the potency of their wood-grown cousins, as many of the compounds from the wood host alchemise within the fruiting body, delivering unique medicine. The more esoteric idea that the mycelium benefits our brains due to its capacity to connect the natural world is one promoted by Stamets, as illustrated in this quote from his bookMycelium Running(2005): "I believe that mycelium is the neurological network of nature."
In our experience, we have had clients reporting the cessation of restless leg, returned sense of smell (after having lost the sense for a period of time), relief from tinnitus, improved digestive function and other positive outcomes. On the topic of digestion, H. erinaceus has been shown to have antibacterial activity againstHelicobacter pylori(Cruz et al., 2016).H. erinaceusis also useful to fight fatigue, with research finding polysaccharides fromH. erinaceus polysaccharides decrease blood lactic acid, serum urea nitrogen, tissue glycogen and markers for oxidative stress (Lui et al 2015). Like its cousin L. edodes,H. erinaceusis potent at reducing cholesterol in rat studies at doses of 100mg/kg of body weight (Wang et al., 2005).
Due to the presence of triterpenoids inH. erinaceus, there is some debate over whether a water extract offers sufficient medicinal compounds or whether there is a need for dual-extraction. We work with water extractedH. erinaceus and get excellent results, and many of the studies use only water extract or even simply groundH. erinaceusmushroom in their trials. Do your research and decide which processing method will best suit you and your client's needs.
Best in: food, decoction, dual-extract tincture, broth, powdered extract (water or dual-extract).
Our last mushroom is one you may not have heard of, however it is one of our favourites to work with (and eat!). Also known as jelly mushrooms due to their soft, ethereal, coral-like appearance,Tremella fruciformis mushrooms are another favourite in the Chinese system.T. fruciformis is a sweet, mild Lung and Spleen herb, revered for nourishing Stomach Yin, and as an immune tonic and a nutritive tonic used to promote restoration of health. It helps that in extract formT. fruciformisalso tastes like vanilla-malt!
Best in: food, broth, powdered extract
Cautions and Contraindications
As with any herb, some populations should approach medicinal mushrooms cautiously:
Check out the amazing work at Avena Journal here.
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