Common Names

  • Himematsutake
  • Agarikusutake
  • Kawarihiratake
  • Cogumelo do Sol
  • Sun mushroom

For Patients & Caregivers

Agaricus extract may benefit patients with certain cancers. But more studies are needed to confirm these observations.

Agaricus blazei is an edible mushroom grown in Brazil and Japan. It is used to treat arteriosclerosis, hepatitis, hyperlipidemia, diabetes, dermatitis, and cancer. Laboratory studies and experiments done in mice have shown that agaricus can stimulate the immune system and has anticancer effects. Compounds present in agaricus prevent formation of blood vessels needed for tumor development.
agaricus may cause liver damage and death.

  • Arteriosclerosis
    There are no clinical data to support this use.
  • Cancer treatment
    One study showed that agaricus extract taken orally, improved the quality of life in patients with gynecological cancers.
  • Chronic hepatitis
    Agaricus is used in traditional medicine to treat hepatitis and a small clinical study showed that agaricus helps improve liver function in patients with hepatitis B.
  • Diabetes
    There are limited in vitro and animal data suggesting that agaricus mushroom has antidiabetic effects. One small clinical study showed that agaricus reduced blood glucose levels in healthy subjects.
  • Hyperlipidemia
    One small clinical study showed that agaricus reduced cholesterol level in healthy subjects.
  • Stimulant
    There are no clinical data to support this use.
  • You are allergic to agaricus or other mushrooms.
  • You are taking drugs that are substrates of Cytochrome P450 3A4 (agaricus may increase the risk of side effects of these drugs).
  • May cause liver damage in cancer patients.
  • Cheilitis (swelling of the lip) has also been reported.
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For Healthcare Professionals

Agaricus blazei Murrill

Agaricus blazei is an edible mushroom native to Brazil and is cultivated in Japan for medicinal uses. It has been used to treat arteriosclerosis, hepatitis, hyperlipidemia, diabetes, dermatitis, and cancer. The polysaccharides and anti-angiogenic compounds present in agaricus are thought to be responsible for its antitumor properties. Agaricus was also shown to have antidiabetic effects in vitro and in animal studies (8) (9).

Results from a study done in human subjects with type 2 diabetes suggest benefits of agaricus extract in improving insulin resistance (10) (11), and a pilot study indicates that agaricus extract may reduce weight, body fat, and serum glucose and cholesterol levels in healthy individuals (12).

The antitumor and immunomodulatory effects of agaricus are due to immunopotentiation or direct inhibition of angiogenesis (3) (4) (6) (21) (22). An agaricus extract enhanced doxorubicin-induced apoptosis against drug-resistant human hepatocellular carcinoma (24).
Oral administration of the extract improved the natural killer cell activity and quality of life in gynecological cancer patients undergoing chemotherapy (7); preliminary data show that daily intake of agaricus powder improves quality of life among cancer patients in remission (26); supplementation with an agaricus extract resulted in immunomodulatory effects, but had no benefit on survival in patients with multiple myeloma (29). However, no such effects were seen in a study of elderly females (25). Larger studies are needed to resolve this.

While a small pilot study reported that agaricus extract may improve liver function in patients with hepatitis B (13), liver damage and deaths (14) along with cheilitis (15) have been reported following consumption of agaricus.

Brefeldin A, a compound isolated from agaricus, was shown to have estrogenic activity, but did not stimulate growth of breast cancer cells (27).

Agaricus is an edible fungus. It is available as freeze-dried mushroom or as concentrated liquid extracts, teas, or capsules. The whole mushroom is often added to soups, sauces, or hot teas.

  • Arteriosclerosis
  • Cancer treatment
  • Diabetes
  • Hepatitis
  • Hyperlipidemia
  • Stimulant

Agaricus extract was shown to exert estrogen-like activity and may help prevent atherosclerosis via dual roles in cell signaling, macrophage development suppression and endothelial cell recovery from vascular damage (16). Both aqueous and organic extracts of agaricus offered protection to cells exposed to methyl methanesulphonate, a mutagenic agent. The stimulus produced by linoleic acid on beta-DNA polymerase, an enzyme involved in repair mechanism following exposure of DNA to alkylating agents, is thought responsible for such an effect (19).

Ergosterol, a major constituent of agaricus, was found to inhibit tumor growth in mice via direct inhibition of tumor-induced angiogenesis (6). Other studies demonstrated that polysaccharides present in agaricus extract caused activation of macrophages (5) or natural killer cells (17) and induced cytotoxic T-lymphocyte activity in tumor-bearing mice. Specifically, activation of natural killer cells was mediated through IL-12-induced IFN-gamma expression (18). Furthermore, agaricus extract stimulates caspase 3 activation and reduces telomerase activity (19) possibly through regulation of Akt signaling (20) thereby inducing apoptosis in cancer cell lines. Blazeispirol A, produced by agaricus fermentation, causes both caspase-dependent and -independent cell death in human Hep 3B cells (21). Agaritine, a hydrazine-containing constituent also exhibits anti-tumor activity toward U937 leukemic cells mediated through apoptosis (22). In another study, polysaccharides isolated from agaricus were shown to induce apoptosis in HL-60 cells through a signaling cascade of mitochondrial caspase-3-dependent pathway (28).

  • An in vitro study suggests that agaricus extract has estrogen-like activity (16) and therefore should be used with caution. Patients with hormone-sensitive cancer should discuss its use with their physician.
  • Hypersensitivity to agaricus.
  • Consumption of agaricus has been associated with hepatic dysfunction in cancer patients (14).
  • Cheilitis has also been reported (15).
  • Cytochrome P450 substrates: Agaricus inhibits CYP3A4 and can affect the intracellular concentration of drugs metabolized by this enzyme (23).
  • May lower blood glucose level (8).
  • May cause an elevation of liver enzymes (14).

  1. Mizuno M, Morimoto M, Minato K, et al. Polysaccharides from Agaricus blazei stimulate lymphocyte T-cell subsets in mice. Biosci Biotechnol Biochem. Mar 1998;62(3):434-437.

  2. Takaku T, Kimura Y, Okuda H. Isolation of an antitumor compound from Agaricus blazei Murill and its mechanism of action. J Nutr. May 2001;131(5):1409-1413.

  3. Gray AM, Flatt PR. Insulin-releasing and insulin-like activity of Agaricus campestris (mushroom). J Endocrinol. May 1998;157(2):259-266.

  4. Kim YW, Kim KH, Choi HJ, et al. Anti-diabetic activity of beta-glucans and their enzymatically hydrolyzed oligosaccharides from Agaricus blazei. Biotechnol Lett. Apr 2005;27(7):483-487.

  5. Liu Y, Fukuwatari Y, Okumura K, et al. Immunomodulating Activity of Agaricus brasiliensis KA21 in Mice and in Human Volunteers. Evid Based Complement Alternat Med. Jun 2008;5(2):205-219.

  6. Hsu CH, Hwang KC, Chiang YH, et al. The mushroom Agaricus blazei Murill extract normalizes liver function in patients with chronic hepatitis B. J Altern Complement Med. Apr 2008;14(3):299-301.

  7. Mukai H, Watanabe T, Ando M, et al. An alternative medicine, Agaricus blazei, may have induced severe hepatic dysfunction in cancer patients. Jpn J Clin Oncol. Dec 2006;36(12):808-810.

  8. Suehiro M, Katoh N, Kishimoto S. Cheilitis due to Agaricus blazei Murill mushroom extract. Contact Dermatitis. May 2007;56(5):293-294.

  9. Yuminamochi E, Koike T, Takeda K, et al. Interleukin-12- and interferon-gamma-mediated natural killer cell activation by Agaricus blazei Murill. Immunology. Jun 2007;121(2):197-206.

  10. Akiyama H, Endo M, Matsui T, et al. Agaritine from Agaricus blazei Murrill induces apoptosis in the leukemic cell line U937. Biochim Biophysica Acta. May 2011;1810(5):519-525.

  11. Engdal S, Nilsen OG. In vitro inhibition of CYP3A4 by herbal remedies frequently used by cancer patients. Phytother Res. 2009 Jul;23(7):906-12.

  12. Lima CU, Souza VC, Morita MC, Chiarello MD, Karnikowski MG. Agaricus blazei Murrill and inflammatory mediators in elderly women: a randomized clinical trial. Scand J Immunol. 2012 Mar;75(3):336-41.

  13. Ohno S, Sumiyoshi Y, Hashine K, Shirato A, Kyo S, Inoue M. Quality of life improvements among cancer patients in remission following the consumption of Agaricus blazei Murill mushroom extract. Complement Ther Med. 2013 Oct;21(5):460-7.

  14. Dong S, Furutani Y, Kimura S, et al. Brefeldin A is an estrogenic, Erk1/2-activating component in the extract of Agaricus blazei mycelia. J Agric Food Chem. 2013 Jan 9;61(1):128-36.

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