Almond Mushroom (Agaricus blazei)
A mushroom from the Brazilian forests studied mainly for immune modulation and blood-sugar support — human evidence is mixed and preliminary, despite the supplement's considerable popularity.
Number of studies
2
Safety
Requires caution
Time to effects
In clinical studies, effects were usually assessed after 8-12 weeks of regular use
Monthly cost
ok. 70–150 zł/miesiąc
Price in Poland
70–180 zł za 60–120 kapsułek
Who it's for
Cena zależy od stopnia standaryzacji i certyfikatu BIO.
Indicative prices for the Polish market — we don't point to specific retailers; the real price depends on the manufacturer, form and place of purchase.
Table of contents
TL;DR
A mushroom from the Brazilian forests studied mainly for immune modulation and blood-sugar support — human evidence is mixed and preliminary, despite the supplement's considerable popularity.
- →Studied as immune support for cancer patients undergoing chemotherapy — preliminary evidence limited to small studies
- →Pilot studies in patients with inflammatory bowel disease observed relief of some symptoms and improved quality of life
- →Preliminary data suggest a possible beneficial effect on insulin resistance in people with type 2 diabetes, used as an add-on to standard treatment
| Latin name | Agaricus blazei Murill (now mainly Agaricus subrufescens) |
|---|---|
| Family | Agaricaceae |
| Active substances | Beta-glucans (including beta-(1→6)-D-glucan), ergosterol, phenolic compounds |
| Form | Powdered fruiting-body extract or liquid extract |
| Level of evidence | Preliminary — a handful of small clinical studies with inconsistent results |
| Interactions | Immunosuppressants, hypoglycemic drugs, anticoagulants, cancer treatment |
| Status | Dietary supplement; not registered as a drug in Poland, the EU, or Japan |
Understand
Overview
The almond mushroom (Agaricus blazei Murill, classified after a 2005 taxonomic revision mainly as Agaricus subrufescens; also encountered under the names Agaricus brasiliensis or 'sun mushroom') is an edible mushroom originally described from Brazil, where it is traditionally called 'himematsutake' or 'sun mushroom' (cogumelo do sol). It reached Japan in the 1960s and became a popular immune-support dietary supplement ingredient there.
Unlike turkey tail, whose PSK/PSP polysaccharides are a registered oncology drug in Japan, the almond mushroom remains primarily a subject of basic research and small clinical studies with mixed, sometimes contradictory results. That makes its evidence level lower and less consistent than turkey tail's.
Who actually benefits from the almond mushroom, and who probably doesn't? The most promising, though still isolated, data concerns people with standardly treated type 2 diabetes, in whom adding the extract was associated with improvement in the HOMA-IR index — but that's one study, not a confirmed, repeatable relationship. People counting on immune support should be aware that another randomized study found no significant effect on inflammatory markers — the evidence here is clearly inconsistent, unlike, say, turkey tail. Because of isolated reports of hepatotoxicity with long-term use of high doses of unpurified preparations, it is also less suitable for people with liver disease.
Where it's found
Agaricus blazei originates from the Piedade region of São Paulo state in Brazil, where it grows naturally on grassland with exceptionally high sun exposure — hence the local name 'cogumelo do sol' (sun mushroom). It is now also cultivated commercially in Japan, China, and South Korea.
History of use
The mushroom was traditionally gathered by local people near Piedade in Brazil before it caught the attention of Japanese researchers and farmers in the 1960s, who brought it to Japan under the name 'himematsutake'. It quickly became popular there as an immune-support supplement, even though — unlike turkey tail — it has never been registered as a drug.
Mechanism of action
Like other medicinal mushrooms, the almond mushroom contains beta-glucans and other polysaccharides credited with immunomodulatory activity through stimulation of dendritic cells, macrophages, and lymphocytes, as well as an effect on cytokine secretion. It also contains ergosterol (a vitamin D2 precursor) and antioxidant phenolic compounds. Research on carbohydrate metabolism has suggested a possible effect on insulin sensitivity, though the mechanism has not been clearly established and some results have not been replicated in independent studies.
The immunomodulatory effect is mainly attributed to a branched beta-(1→6)-D-glucan fraction, which immune cells recognize via the Dectin-1 receptor and Toll-like receptors on macrophages and dendritic cells, leading to secretion of pro-inflammatory cytokines (including TNF-alpha, IL-6). Regarding the effect on carbohydrate metabolism, it has been hypothesized that Agaricus blazei polysaccharides may increase tissue insulin sensitivity through mechanisms related to AMPK activation — however, unlike beta-glucan-driven immunomodulation, this mechanism remains poorly studied directly for this species.
Beta-glucan recognition
Binding to the Dectin-1 receptor and Toll-like receptors on macrophages and dendritic cells.
Immune cell activation
Stimulation of lymphocytes, NK cells, and cytokine secretion (TNF-alpha, IL-6).
Antioxidant activity
Phenolic compounds and ergosterol neutralize free radicals and support overall cell condition.
Hypothetical effect on insulin sensitivity
A proposed, poorly directly studied pathway linked to AMPK activation.
Clinical effect
Inconsistent between studies — dependent on dose, preparation form, and population studied.
Evidence: early-stage — based on 2 studies in this database.
Benefits
Common myths
MythThe almond mushroom is a 'cancer mushroom' stronger than other medicinal mushrooms
FactThat's not true — clinical evidence for the almond mushroom is weaker and less consistent than, for example, for turkey tail (PSK/PSP).
MythSince it's a 'natural' supplement, it can be combined with any medication without consultation
FactThe almond mushroom has documented potential to affect blood sugar levels and the immune system, meaning real interaction risk with medications.
Forms & variants
Almond Mushroom (Agaricus blazei) comes in several forms that differ in bioavailability and use case — the form you pick genuinely matters for how effective the supplementation is.
Powdered fruiting-body extract (standardized for beta-glucans)
The most commonly available form in Polish shops, usually standardized for polysaccharide content
Best for: Daily supplementation supporting immunity
Liquid extract (AndoSan-type)
The form used in most clinical studies, harder to find in Poland
Best for: People wanting the form closest to what's been studied scientifically — usually needs to be imported
Practice
Frequently asked questions
Preliminary studies suggest a beneficial effect on some immune parameters in cancer patients and people with inflammatory bowel disease. However, other studies found no effect on inflammatory markers. The evidence is mixed.
A small randomized study in patients with type 2 diabetes treated with metformin showed improved insulin resistance after adding the extract. That's a promising but isolated result — it doesn't replace diabetes treatment.
Both mushrooms are studied for immune support, but turkey tail has considerably stronger clinical evidence — its PSK/PSP polysaccharides are a registered drug used alongside chemotherapy in Japan.
Dosage & timing
Typical dose
500–1500 mg of dried fruiting-body extract daily; clinical studies used doses around 1500 mg/day
Form
Capsules, powder, or liquid extract from powdered fruiting body
The scientific evidence for the almond mushroom is weaker and less consistent than for some other functional mushrooms. People with cancer or on long-term medication should discuss supplementation with a doctor.
Best times to take it
- Split into 2-3 doses through the day, with a meal, for better stomach tolerance
What to combine with
Good combinations
Lion's Mane — A popular pairing in mushroom stacks aimed at general immunity
Safety
Side effects & contraindications
Possible side effects
Generally well tolerated in clinical studies
Possible mild gastrointestinal complaints at the start of supplementation
Rarely: allergic reactions in people allergic to mushrooms
Isolated reports of hepatotoxicity with long-term use of high doses of unpurified preparations
Contraindications
Pregnancy and breastfeeding (insufficient data)
Mushroom allergy
Autoimmune diseases — medical consultation recommended due to immunostimulant activity
Liver disease — due to isolated reports of hepatotoxicity at high doses
People undergoing cancer treatment: use only after consulting the treating oncologist
Interactions
Immunosuppressants — potential antagonism of effect; medical consultation required
Blood-sugar-lowering drugs — possible additive hypoglycemic effect
Anticoagulant and antiplatelet drugs — theoretical interaction risk
Chemotherapy and other cancer drugs — combine only under the supervision of the treating physician
Is it worth taking?
Who it's for
- People looking for additional, though less well documented, immune support
- People with type 2 diabetes considering a supplement to help with glycemic control — only as an add-on to doctor-prescribed treatment
Not for
- Pregnancy and breastfeeding (insufficient data)
- Mushroom allergy
- Autoimmune diseases — medical consultation recommended due to immunostimulant activity
- Liver disease — due to isolated reports of hepatotoxicity at high doses
- People undergoing cancer treatment: use only after consulting the treating oncologist
Evidence
Worth knowing
The species' taxonomic identity was disputed for decades — only in 2005 was it finally established that the Agaricus blazei sold in supplements is mostly Agaricus subrufescens.
In Brazil, the Piedade region the mushroom comes from has a microclimate with unusually high sun exposure, hence the local name 'cogumelo do sol' (sun mushroom).
Studies
In patients with type 2 diabetes, adding 1500 mg of Agaricus blazei extract daily for 12 weeks was associated with improvement in the HOMA-IR insulin resistance index compared to placebo.
Hsu CH, et al., Journal of Alternative and Complementary Medicine, 2007
Agaricus blazei Murrill and inflammatory mediators in elderly women: a randomized clinical trial
Early-stage evidenceLima CUJO, Souza VC, Morita MC, Chiarello MD, de Oliveira Karnikowski MG · Scandinavian Journal of Immunology · 2012
A randomized, double-blind, placebo-controlled study in 57 older women found no significant effect of 900 mg of Agaricus blazei extract daily on the inflammatory markers IL-6, IFN-gamma, and TNF-alpha.
View studyThe mushroom Agaricus Blazei Murill in combination with metformin and gliclazide improves insulin resistance in type 2 diabetes
Early-stage evidenceHsu CH, Liao YL, Lin SC, Hwang KC, Chou P · Journal of Alternative and Complementary Medicine · 2007
In 72 patients with type 2 diabetes, adding 1500 mg of Agaricus blazei extract daily for 12 weeks was associated with improvement in the HOMA-IR insulin resistance index compared to placebo.
View studySources & bibliography
Citations are illustrative for this demo version and require full bibliographic verification by the editorial team before production publication.
Compare with similar entries
About the authors of this entry
Author
Julia WiśniewskaEditor, Neurohacking & Sleep
Julia writes about nootropics, chronobiology and recovery protocols.
45 publications on this site
Medical review
Michał NowakClinical Dietitian
Michał specializes in metabolic nutrition, intermittent fasting and sports supplementation.
61 publications on this site
Related entries
4.5Turkey Tail
The mushroom behind PSK and PSP — the only fungal polysaccharides registered in Japan as drugs supporting chemotherapy. Among the most solid clinical evidence of any functional mushroom, but this is NOT a standalone cancer therapy.
4.4Lion's Mane
A functional mushroom studied for its effect on nerve growth factor (NGF) and cognitive function — human evidence is still preliminary.
4.1Maitake (Hen of the Woods)
A functional mushroom also known as 'Hen of the Woods,' studied mainly for immune modulation (D-fraction) in oncology and, more preliminarily, for carbohydrate metabolism — evidence in healthy people remains limited.
4.1Cauliflower Mushroom (Sparassis crispa)
A rare, prized forest mushroom with one of the highest documented beta-glucan contents — in Poland it's mainly foraged for the table, while Japanese research into its effects on immunity and blood sugar rests almost entirely on animal models.
4.3Shiitake
A culinary-functional mushroom rich in lentinan and beta-glucans, studied clinically for immune modulation and lipid profile — one of the best-researched functional mushrooms on the market.
4.3Oyster Mushroom (Pleurotus ostreatus)
One of the most popular edible mushrooms in Poland, containing a natural compound structurally similar to lovastatin — studied mainly for its effects on lipid profile and immunity.
4.2Reishi (Ganoderma lucidum)
A functional mushroom with more than 2,000 years of history in Chinese and Japanese medicine, studied for its immune-modulating effects — human clinical evidence, however, remains modest and partly contradictory.
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Comments (2)
- KW
Kasia W. 2 weeks ago
Very clearly explained, especially the interactions section — I hadn't seen it laid out this well anywhere else.
- MT
Marek T. a month ago
Are you planning to update this with the newest study from this year? I saw an interesting meta-analysis.