Eden Apothecary · Herb Profile
Grifola frondosa
Pronounced Maitake: my-TAH-kay. Grifola frondosa: GRIF-oh-luh fron-DOH-suh. Hui shu hua: hway shoo hwah.
Neutral and drying: a sweet, building food-mushroom that strengthens the spleen and defensive qi, drains metabolic damp, and steadies blood sugar and blood pressure in the boggy, over-fed, depleted terrain.
No pre-1900 source found for this reading.
Avoid therapeutic and concentrated-extract doses in pregnancy unless supervised by a qualified practitioner. There is no reliable human safety data for maitake or its D-fraction extracts in pregnancy; the Natural Standard systematic review and consumer references (Drugs.com, RxList/WebMD) state that safety information in pregnancy is lacking and advise against use, and Memorial Sloan Kettering groups it among herbs to use only with medical guidance. Culinary use of the whole mushroom as food is a food-level exposure of low concern, but concentrated immune and D-fraction extracts should be avoided in pregnancy pending better data. Sources: MSKCC About Herbs (Maitake); Ulbricht et al., Natural Standard systematic review of Grifola frondosa (PMID 19476741; Drugs.com); RxList/WebMD; AHPA Botanical Safety Handbook (2nd ed.).
Insufficient data; avoid therapeutic and extract doses during lactation without professional guidance. It is not known whether maitake's constituents pass into breast milk, and human lactation safety data are lacking. Culinary use of the whole mushroom is a food-level exposure of low concern, but concentrated extracts should await better data or qualified supervision. Sources: MSKCC About Herbs (Maitake); Ulbricht et al., Natural Standard systematic review (Drugs.com, PMID 19476741); AHPA Botanical Safety Handbook (2nd ed.).
No established pediatric dosing for the concentrated immune or D-fraction extracts; use therapeutically only under professional guidance. Maitake is a low-toxicity, food-grade mushroom, and culinary use in cooking is a food-level exposure of low concern for children, but there is no general pediatric safety or dosing data for self-directed medicinal use. Reserve concentrated extracts for children to qualified practitioner oversight, and coordinate any use in a child with a serious diagnosis through their medical team. Sources: MSKCC About Herbs (Maitake); Natural Standard systematic review (Drugs.com); NCCIH general guidance on children and dietary supplements.
Maitake is a choice edible mushroom with a long record of food use and low toxicity, and the common issues are mild. Reported effects are limited and include asymptomatic eosinophilia (a symptomless rise in a white-cell count) noted in patients with myelodysplastic syndrome taking maitake extract, and occasional mild digestive upset. Because it lowers blood sugar, people on insulin or oral antidiabetic drugs should monitor their glucose for additive hypoglycemia, and because it can lower blood pressure, those on antihypertensives should watch for additive effects. A single case report links maitake to a rise in INR in a patient on warfarin, so anticoagulated patients should have their INR monitored. Because it stimulates and modulates immune activity, use it cautiously and under professional guidance in active autoimmune disease and in organ-transplant recipients or others on immunosuppressant therapy. As a fungus it can provoke allergic reactions in the mushroom-sensitive. Anyone with a cancer, diabetes, or hypertension diagnosis should use it only as an adjunct coordinated with their medical team, never as a substitute for evaluation or treatment.
Known allergy or hypersensitivity to maitake or other mushrooms. Concurrent insulin or oral antidiabetic therapy (additive hypoglycemia), antihypertensive therapy (additive blood-pressure lowering), and warfarin or other anticoagulants (a case report of INR elevation), except with monitoring. Immunosuppressant and organ-transplant regimens and active autoimmune flare, except under qualified supervision. Marked yin-deficient dryness and acute febrile exterior invasion. Pregnancy and lactation at therapeutic (extract) doses without professional guidance. Self-treatment of cancer, diabetes, or hypertension in place of conventional care; use only as a coordinated adjunct.
Grifola frondosa is a widespread saprophyte and root-butt parasite of oaks and other hardwoods across the temperate Northern Hemisphere (Japan, China, Europe, and eastern North America), and it is not at risk and does not appear on the United Plant Savers at-risk list. It is also cultivated commercially on a very large scale, especially in Japan, so cultivated fruiting bodies are abundant and sustainably obtained. Favor cultivated or responsibly wildcrafted material, and correctly identify wild specimens (maitake is a choice, distinctive edible, but general mushroom-foraging caution applies).
Not in the canonical biblical texts nor in the classical Greco-Roman herbals; maitake is a mushroom of East Asian (Japanese and Chinese) medicine and cuisine, not a plant of the ancient Holy Land. Its Japanese name, maitake, means 'dancing mushroom,' traditionally explained by the joy of foragers who found this prized and valuable fungus; in Chinese it is hui shu hua, the 'grey tree flower.' Cited honestly as a food-medicine of East Asian tradition rather than of Scripture.
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