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Mohanta, T. Edible Mushrooms as Myco-Therapeutics. Encyclopedia. Available online: https://encyclopedia.pub/entry/21107 (accessed on 18 July 2025).
Mohanta T. Edible Mushrooms as Myco-Therapeutics. Encyclopedia. Available at: https://encyclopedia.pub/entry/21107. Accessed July 18, 2025.
Mohanta, Tapan. "Edible Mushrooms as Myco-Therapeutics" Encyclopedia, https://encyclopedia.pub/entry/21107 (accessed July 18, 2025).
Mohanta, T. (2022, March 28). Edible Mushrooms as Myco-Therapeutics. In Encyclopedia. https://encyclopedia.pub/entry/21107
Mohanta, Tapan. "Edible Mushrooms as Myco-Therapeutics." Encyclopedia. Web. 28 March, 2022.
Edible Mushrooms as Myco-Therapeutics
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This entry is adapted from the peer-reviewed paper 10.3390/jof8020211

Polysaccharides (essentially β-D-glucans), chitinous substances, heteroglycans, proteoglycans, peptidoglycans, alkaloids, lactones, lectins, alkaloids, flavonoids, steroids, terpenoids, terpenes, phenols, nucleotides, glycoproteins, proteins, amino acids, antimicrobials, and minerals are the major bioactive compounds in these mushrooms. These bioactive compounds have chemo-preventive, anti-obesity, anti-diabetic, cardioprotective, and neuroprotective properties. Consumption of edible mushrooms reduces plasma triglyceride, total cholesterol, low-density lipoprotein, and plasma glucose levels. Polysaccharides from edible mushrooms suppress mRNA expression in 3T3-L1 adipocytes, contributing to their anti-obesity properties. Therefore, edible mushrooms or their active ingredients may help prevent obesity and other chronic ailments.

edible mushroom obesity body mass index gut microbiota anti-obesity agent

1. Introduction

Mushrooms are spore-bearing fruiting bodies of fungi that grow above the ground. They are rich in starches and proteins but are a poor source of fat [1]. Many researchers have reported the nutritional value of various mushrooms. Reis et al. reported the composition of Agaricus bisporus as 14.1% protein, 2.2% fat, and 74.0% carbohydrates, while another mushroom Pleurotus ostreatus contains 7.0% protein, 1.4% fat, and 85.9% carbohydrates [2]. Mushrooms also contain micronutrients, mainly various types of vitamin B such as riboflavin, niacin, and pantothenic acid [3]. The consumption of 100 g of mushrooms provide 22 calories. Oyster mushrooms are common in South Asian countries. They are used to make oyster sauce in Chinese cuisine. The cremini mushroom is also known as the baby Bella mushroom. The portobello mushroom is mainly used for highly woody flavours and has immunomodulatory properties [4]. Aromatic shiitake mushrooms in Italian foods have antiviral properties [5]. Maitake mushrooms have immune-protective and anti-tumour properties [6][7]. The pioppino mushroom (Cyclocybe aegerita) is a good source of nutrients (amino acids, malic acid, and sugars) and has anticancer, antifungal, and antiviral properties [8][9].
Mushrooms are used as food and nutraceuticals. They are essential nutrient supplements that play a vital role in health and illnesses. They have low polyunsaturated fat. Therefore, eating mushrooms helps to reduce weight, as a low fat, low glucose, and high mannitol diet can prevent diabetes [10]. Mushrooms also have low sodium and no cholesterol, which prevents hypertension [11]. Mushrooms have high levels of antioxidants. Few researchers have reported their preventive effect against cancer [12][13]. Mushrooms possess antioxidant properties, which aids in the antioxidant defence mechanisms of cells [14]. They have anti-inflammatory properties and reduce the risk of obesity-related dyslipidaemia and hypertension [4][5][15][16][17][18][19][20][21][22][23][24][25]. Mushroom consumption on a regular basis is useful in curing metabolic disorders that include obesity. Therefore, they could be nutraceuticals of choice in the future for anti-obesity treatment. P. ostreatus, frequently called the oyster mushroom, is one of the world’s most widely consumed mushrooms after white button mushrooms (A. bisporus). P. ostreatus is especially significant since it can colonise and make use of a broad range of lignocellulosic substrates from natural deposits. It grows more rapidly than other edible mushrooms. In addition, P. ostreatus contains bioactive substances, including β-glucans, which aid in cardiometabolic health [26][27]. P. ostreatus has two-fold more β-glucan content compared to A. bisporus. They are nutritional fibres that have gained popularity due to their ability to reduce insulin obstruction, hypertension, dyslipidaemia, and obesity. β-glucans are exceptionally good supplements for human gastrointestinal health, and their fermentation is believed to contribute to the wellbeing of the intestine. These effects have been widely reported in studies with oat and grain β-glucans. Mevinolin, also known as lovastatin, has an inhibitory effect on 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase and is also involved in decreasing cholesterol synthesis. In addition, in vitro digestion of P. ostreatus produces bioactive peptides that inhibit angiotensin-converting enzymes [28]. P. ostreatus contains abundant phenolic compounds which may be involved in lowering the blood pressure [29][30]. P. ostreatus has been used in animal studies and showed hypoglycaemic, hypolipidemic, and antioxidant effects. Animals consuming P. ostreatus exhibited reduced food intake and weight gain, suggesting the anti-obesogenic potential of this edible mushroom [29][30][31][32][33][34].
Ergosterol peroxide is a compound found in mushrooms that decreases the accumulation of fatty acids in 3T3-L1 cells (Figure 1) [35]. This compound inhibits the mRNA upregulation of sterol regulatory element binding protein-1c (SREBP-1c). SREBP-1c is a sterol response limiting protein that regulates the response of sterol in the body. In addition, ergosterol peroxide treatment inhibits the expression of unsaturated fat synthase, unsaturated fat translocase, and acetyl-coenzyme A carboxylase involved in the synthesis and transportation of long-chain unsaturated fatty acids. Since it aids in the prevention of obesity and related metabolic conditions, these reports suggest that ergosterol peroxide obtained from G. lucidum might be a potential drug for anti-obesity treatment [35]. AMP-activated protein kinase (AMPK) is a key regulator of homeostasis. Increased AMPK activity showed antihyperglycemic and anti-hyperinsulinemic effects which resulted in reduced obesity in mice. Consumption of H. erinaceus (a mushroom) powder reduced total plasma cholesterol and leptin levels in mice that were fed a diet containing the amount of fat tissue [36].
Figure 1. Pharmacological effects of ergosterol peroxide derived from mushrooms on obesity [35]. Ergosterol shows anti-obesity effect by reducing triglycerides accumulation, inhibiting expression of FAT, FAS, AAC, inhibiting metabolic syndrome, enhancing AMPK expression, increasing antihyperglycemic, and anti-hyperinsulinemic activities.
G. lucidum has anti-diabetic properties and has been used in conventional Chinese medicine. In mice following a high-fat diet (HFD), administration of water concentrate of G. lucidum mycelium (WEGL) reduced bodyweight, irritation, and insulin obstruction [37]. Along with reducing HFD-induced gut dysbiosis (as seen by lower Firmicutes-to-Bacteroidetes ratio and increased abundance of endotoxin producing proteobacteria), WEGL administration alleviates metabolic endotoxemia [38]. The weight-reducing and microbiota-regulatory effects can be passed on from WEGL-treated mice to HFD-administered ones by faecal exchange. In addition, high molecular weight polysaccharides (>300 kDa) present in the WEGL have shown anti-obesity and microbiota-regulating properties. G. lucidum and its high atomic weight polysaccharides can be used as prebiotics in overweight individuals to treat gut dysbiosis and metabolic disorders [37].
Pleurotus citrinopileatus is another potential source of bioactive mixtures and therefore, can be used in anti-obesity treatment [39][40][41]. One study assessed the anti-obesity and hypolipidemic effects of P. citrinopileatus water extract (PWE) in high-fat diet-induced obese (DIO) C57BL/6J mice. They were administered with PWE in gradually increasing concentrations (400 to 800 mg/kg of body weight, independently) along with a high-fat diet for 12 weeks [42]. Within 12 weeks, the weight gain, fat build-up, and food utilisation of DIO mice were drastically reduced in mice administered with PWE. PWE also decreased fatty acid, cholesterol, and low-density lipoprotein levels in the blood, simultaneously increasing the activity of aspartate transaminase, non-esterified unsaturated fats, creatinine levels, and high-density lipoprotein levels. Moreover, PWE also enhanced glucose tolerance in HFD mice and showed a high potential for managing obesity and other metabolic diseases [42].

2. Effect of Mushroom Consumption on Gut Microbiota

The beneficial effects of edible mushrooms and their polysaccharides on the gut microbiota, which are closely linked with the body weight, are currently a major focus in the field. A study in mice reported that administering the concentrates of G. lucidum reduced the body weight by modifying the microbiota, suggesting that mushrooms might be used as a potential probiotic for weight reduction [37]. The effect of HFD on gut microflora is more pronounced than the effect on energy balance. HFD-induced changes in the gut microbiota have been shown to reduce Firmicutes to Bacteroides ratio, which is related to high energy accumulation, fat storage, and intestinal homeostasis over time. Through the provocative rundown and platelet markers, obesity negatively affects the immunity. Several studies have examined the anti-obesity effects of polysaccharides from various mushrooms in vitro and in vivo [43][44][45]. Polysaccharides from Coriolus versicolor initiated an immunomodulatory effect in mice splenocytes through the MAPK-NF-B pathway [46]. A polysaccharide from Tremella fuciformis hindered the differentiation of 3T3-L1 adipocytes by reducing the mRNA expression, suggesting that this polysaccharide could be a potential prebiotic for obesity [47]. Cure of adipocytes with G. lucidum diminished adipogenic record factor articulation, which increases glucose and lipid transport and activates AMPK pathway, suggesting its potential as an anti-obesity drug [48].
Being overweight could cause several other illnesses and result in a reduced lifespan. A recent study suggests that changes in the gut microbiota are associated with obesity and other related metabolic syndromes [49][50][51]. The gut microbiota comprises trillions of microorganisms that perform several functions, including nutrient metabolism, maintaining the gastrointestinal cells, modulating the immune system, protecting against the invasion of pathogens, and balancing the endotoxins. The gut microbiota generate energy from food and can cause overweight and type 2 diabetes mellitus (T2DM). It has been observed that in overweight mice, the gut microbiota draws out more energy from food than lean mice [52]. In healthy people, vancomycin treatment for one week modifies the gut microbiota, which results in reduced insulin sensitivity [53]. Additionally, the transfer of gut microbiota of any lean person to an overweight person leads to the development of insulin sensitivity in the recipient. These results suggest that changes in gut microbiota could cause obesity and T2DM.
In HFD animals, the levels of proteins that play a role in maintaining tight junctions of the intestine are lower than those in chow-fed animals. Administration of G. lucidum extract could recover the levels of those proteins, which resulted in the maintenance of the integrity of the intestine and prevention of the translocation of pro-inflammatory endotoxins from gut bacteria to blood (for example, lipopolysaccharides) [37]. Using a mouse obese model, it has been observed that feeding of high-fat diet for eight weeks increased the body weight, liver weight, fat accumulation, and lipid deposition in hepatocytes and adipocytes compared to the control group that were fed with chow. Supplementation with the water extract of G. lucidum reduced the weight gain and accumulation of fats in HFD mice. G. lucidum also improved glucose tolerance and insulin sensitivity. Compounds in G. lucidum that reduce obesity are high molecular weight polysaccharides (greater than 300 kDa). Fungal polysaccharides cannot be digested in the stomach or small intestine. However, the large intestine can digest them and produces short-chain fatty acids, consequently secreting GLP-1. GLP-1 and short-chain fatty acids ultimately enter the blood and affect the brain, muscles, adipose tissues, and liver. Additionally, GLP-1 reduces gastric emptying and thereby, the appetite. It also reduces the deposition of fats, resistance to insulin, and inflammation. It also upregulates the proliferation and downregulates apoptosis in β-cells [37]. This suggests that Escherichia coli in the large intestine releases proteins that enhance or aid in the production of GLP-1 and peptide YY, which increases satiety [44]. These results indicate that the water extract of G. lucidum could be a potential prebiotic agent that can be used for the treatment of obesity and related complications [37]. Button mushrooms (A. bisporus) and L. edodes contain several polysaccharides, indicating their potential to stimulate the growth of beneficial bacteria in the gut.
Hirsutella sinensis is the asexual form of Ophiocordyceps sinensis. It modifies the composition of the gut microbiota and is beneficial in reducing obesity, inflammation, and diabetes in HFD mice. Table 1 presents the effects of various mushrooms on gut microbiota.
Table 1. Effect of various mushrooms on gut microbiota.
Name of Mushroom Effect on Gut Microbiota References
Pleurotus eryngii P. eryngii polysaccharides altered the abundance of SCFA producing gut bacteria [54]
Pleurotus sajor-caju Growth of SCFA producing bacteria was reduced, and E.Shigella was decreased by Pleurotus sajor-caju. [48]
Flammulina velutipes increase in lactic acid-producing bacteria (Lactobacillus, Lactococcus, and Streptococcus) and SCFA-producing bacteria (Allobaculum, Bifidobacterium, and Ruminococcus) [55]
Hypsizygus marmoreus
Lentinusedodes
Grifola frondosa
Pleurotus eryngii
Ganoderma lucidum G. lucidum enhanced SCFAs producing bacteria and abridged sulfate-reducing bacteria in a time-dependent manner [56]
Lentinula edodes LESDF-3 was found to stimulate the synthesisof Bacteroides [57]
Bulgaria inquinans increase of Faecalibaculum and Parabacteroides abundance and the decrease of Allobaculum, Candidatus_Saccharimonas, and Rikenella abundance at the genus level [58]
Ganoderma lucidum There was an increase in Bacteroides/Firmicutes ratio, Clostridium clusters IV, XVIII, XIVa (Roseburia spp.), Eubacterium spp.) SCFAs production bacteria, reduction in Oscillibacter spp. and E. fergusonii. [37]
Increase in Alloprevotella, Barnesiella, Parabacteroides, Bacteroides, Bacteroidales S24-7 and Alistipe. Decrease in Blautia, Roseburia, and Enterorhabdus. [59]
Increase in Blautia, Bacteroides Dehalobacterium, and Parabacteroides,
Decrease in Proteus, Aerococcus, Ruminococcus, and Corynebactrium.		 [60]
Increase in Alloprevotella, Prevotella, Ruminococcus and, Alistipes, Peptococcaceae, Alloprevotella, and Defluviitalea,; Decrease in Turicibacter, Clostridium XVIII and Phascolarctobacterium. [61]
Grifola frondosa Increase in Akkermansia muciniphila, Bacteroidetes/Firmicutes, Porphyromonas gingivalis, Lactobacillus acidophilus, Roseburia intestinalis, Tannerella forsythia, and Bacteroides acidifaciens. [60]
Increase in Barnesiella Helicobater, Intestinimonas, Defluvitalea, Flavonifractor and Paraprevotella and Ruminococcus.
Decrease in Butyricicoccus, Clostridium-XVI, and Turicibacter.		 [62]
Increase in Alistipes.
Decrease in Streptococcus, Enterococcus, Staphlococcus, and Aerococcus.		 [63]
An increase in Bacteroidetes/Firmicutes ratio increased the abundance of Oscillibacter, Defluvitalea, and Barnesiella. [64]
Increase in Intestinimonas and Butyricimonas.
Decrease in Turicibacter and Clostridium XVIII.		 [65]
Phellinus linteus Increase in Lachnospiraceae-NK4A136, Roseburia, Prevotella Lachnospiraceae-UCG-006, Anaerotruncus, Blautia, Eubacterium_xylanophilum, Ruminiclostridium-9, and Oscillibacter. [66]
Coriolus versicolor Increase in Akkermansia muciniphila [67]
Hericium erinaceus Increase in Bifidobacterium, Coprococcus, Desulfovibrio, Lactobacillus, Parabacteroides, Prevotella; Decrease in Corynebacterium, Dorea, Roseburia, Ruminococcus, Staphylococcus, Sutterella [68]
Ganoderma lucidum Increase in Firmicutes, Proteobacteria (Helicobacter), Rikenella; Decrease in Acinetobacter, Actinobacteria (Arthrobacter, Corynebacterium), Bacteroidetes (Bacteroides, Parabacteroides, Prevotella), Blautia, Brevundimonas, Clostridium, Coprobacillus, Cyanobacteria, Facklamia, Jeotgalicoccus, Sporosarcina, Staphylococcus, Streptococcus [69]
Boletus edulis, Boletus pinophilus, Boletus aureus (Porcini), Armillaria mellea(Honey fungus), Lactarius piperatus (blancaccio), Pleurotus eryngii (King oyster) Increase in Bifidobacterium and Lactobacillus genera [70]
Cyclocybe cylindracea (poplar mushroom), Hericium erinaceus, Pleurotus eryngii, Pleurotus ostreatus (Oyster mushroom) Increase in Bifidobacterium spp. Faecalibacterium prausnitzii (Ruminococcaceae), Eubacterium rectale/Roseburia spp. [71]
Flammulina velutipes (Enoki), Hypsizygus marmoreus, (White beech mushroom), Lentinula edodes (Shiitake), Grifola frondosa, (Maitake) Pleurotus eryngii Increase in Allobaculum, Bifidobacterium, Ruminococcus, Lactobacillus, Lactococcus, Streptococcus [55]

3. Mushrooms as Potential Anti-Obesity Agents

Numerous clinical studies have reported the anti-obesity effects of mushrooms. A clinical trial was conducted on 73 obese adults in which mushrooms were substituted for red meat as a part of the regular diet. At the end of one year, less energy intake, reduced body weight, low body mass index, low waist circumference, and low systolic and diastolic blood pressure was reported in the subjects on mushroom diet [72]. Few animal studies have also reported the anti-obesity effects of mushrooms. One study showed the anti-obesogenic effect of mushroom (Grifola gargal- 2%) after its administration in mice for 42 days. It observed a reduction in blood glucose, triglyceride, and adipose tissue [73]. In another study, six weeks mice were divided into six groups: (1) low-fat diet control group, (2) low dose of mushroom (G. lucidum)- 100 mg/kg in the low-fat diet group, (3) high dose of mushroom (G. lucidum)- 300 mg/kg in the low-fat diet group, (4) high-fat diet control group, (5) low dose of mushroom (G. lucidum)- 100 mg/kg in the high-fat diet group, (6) high dose of mushroom (G. lucidum)- 300 mg/kg in the high-fat diet group. Mice in each group were divided into two cages, with three mice in each cage. The temperature was maintained at 25–28 °C. G. lucidum was administered once a day to each mouse for 12 weeks, and weight and food intake were monitored regularly. Weight was significantly reduced in the low-fat diet group [74].

4. Recommendations and Implications for the Future

Different clinical trials have been conducted on mushrooms in various forms and their beneficial effects on health have been analysed. They include fresh, cooked, and powdered forms. Herein concluded in vitro and in vivo studied on the anti-obesity effects of edible mushrooms by modulating gut microflora. The findings of the clinical trials suggest that edible mushrooms can be used as alternative to vegetables; they contain several bioactive compounds and could be used as nutraceuticals. They also contain essential nutrients such as vitamins and minerals and have low sodium and cholesterol contents. Therefore, it is an excellent alternative food source for patients with hypertension. They also contain trace elements such as selenium which aids in improving human health. Therefore, edible mushrooms are potential candidates for preventing obesity and several other chronic ailments.

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Tapan Mohanta
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