Poria
fungus PolyporaceaeWolfiporia cocos
Also known as: Fu Ling, 茯苓, Tuckahoe
clinical_notes Clinical Summary
Wolfiporia cocos (Fu Ling / Poria) is one of the most clinically significant fungi in Traditional Chinese Medicine, present in approximately 10% of all TCM formulations and documented for over 2,500 years.
Its sclerotium contains beta-(1->3)-D-glucan polysaccharides (84% DW) providing immunomodulatory activity, and lanostane triterpenoids led by pachymic acid that function as aldosterone antagonists (diuretic), GLUT4 upregulators (hypoglycemic), and anxiolytics.
Modern pharmacological studies confirm its classical TCM indications: polysaccharides modulate gut microbiota and immune signaling; triterpenoids produce diuretic and antidepressant-like effects in animal models; the combined extract demonstrates hepatoprotective activity.
Uniquely among medicinal fungi, Poria has well-documented sedative and calming properties clinically relevant to insomnia and anxiety.
Pregnancy Safety
No clinical pregnancy data. Poria is used in some TCM pregnancy formulas, but specific safety data are lacking. Some TCM texts caution against use in patients with scanty urine or yin deficiency. Default to C pending formal reproductive studies.
Lactation Safety
No lactation-specific safety data. Transfer of triterpenoids or polysaccharides into breast milk not studied. Avoid concentrated supplements during lactation unless under practitioner supervision.
warning Contraindications
- Diuretic medications (loop diuretics, thiazides, aldosterone antagonists) (caution)Theoretical
- Immunosuppressive therapy (caution)Theoretical
- Hypoglycemic medications (insulin, metformin, sulfonylureas) (caution)Theoretical
vital_signs Clinical Profile
Primary Indications
- check_circle insomnia
- check_circle anxiety
- check_circle edema and fluid retention
- check_circle digestive weakness
- check_circle diabetes support
- check_circle liver disease support
- check_circle immune deficiency
- check_circle chronic stress
- check_circle fatigue
- check_circle chronic gastritis
- check_circle nephrosis support
Therapeutic Actions
System Affinities
- check_circle urinary system
- check_circle central nervous system
- check_circle spleen/digestive
- check_circle hepatic
- check_circle immune system
labs Active Constituents
Poria cocos Polysaccharides (PCP) — beta-(1->3)-D-glucan; 84% DW of sclerotium
Lanostane triterpenoids: pachymic acid, tumulosic acid, pinicolic acid, polyporenic acid C
Ergosterol
Fatty acids
Sterols and enzymes
Polysaccharide-protein complexes
psychiatry Mycology
Underground sclerotium: irregular tuberous mass 10-30 cm across; gray-brown rugose cortex; white to pinkish-white compact fibrous interior. True basidiocarps are rare flat white resupinate structures. Part used medicinally is always the sclerotium.
Parasitic on roots of Pinus massoniana, Pinus tabulaeformis, and other pines; grows 10-60 cm below soil surface in sandy, well-drained acidic forest soils
Subtropical and warm-temperate forests of East and Southeast Asia — primarily Yunnan, Sichuan, Anhui provinces of China; also Vietnam, Taiwan, Japan. Cultivated commercially in China.
sclerotium
White (from basidiocarps when present)
Commercially cultivated in China by inoculating pine log stumps with Wolfiporia cocos mycelium. Yunnan cultivated sclerotia (Yun Ling) are considered highest quality. Pine root cultivation yields higher triterpenoid content than substitute substrate methods.
Sclerotium can be confused with other subterranean fungi or tubers. Authenticated Poria cocos should be tested by HPLC for pachymic acid and polysaccharide content. Adulteration with starch or other Wolfiporia species has been reported.
history_edu Traditional Use
Traditional Chinese Medicine (TCM)
茯苓 (Fu Ling)
One of the most widely prescribed TCM botanicals. Considered a superior-grade medicine in Shen Nong Bencao Jing dating to 1st-2nd century AD. Yunnan Province cultivated Poria considered highest quality.
Traditional Uses Across Healing Systems
While many herbs lack controlled clinical trials, centuries of traditional practice across cultures provide valuable insight into their therapeutic applications.
Draining dampness, strengthening Spleen, calming the Mind — prescribed for edema, insomnia, palpitations, and digestive weakness
Fu Ling is present in approximately 10% of all TCM prescriptions; documented use spans >2500 years from Shen Nong Bencao Jing
Bukuryo used in Japanese Kampo formulas for fluid metabolism, mental calming, and digestive support
Key ingredient in many foundational Kampo formulas including Keishi-bukuryo-gan
Tuckahoe — dried and eaten as bread substitute by various Indigenous peoples of the eastern United States
Known as Indian Bread or Tuckahoe; used as starvation food and tonic in 17th-19th century
spa Parts Used
sclerotium
- insomnia
- anxiety
- edema
- digestive weakness
- immune support
- diabetes support
- hepatoprotection
Sclerotium is the primary medicinal part used in TCM. Different portions are used differently: the cortex (fu-ling-pi) for stronger diuretic action; white interior (bai-fu-ling) for spleen-tonifying and calming; reddish inner layer (chi-fu-ling) for clearing Heart damp-heat. Hot-water decoction extracts polysaccharides; ethanol extraction also captures triterpenoids.
shield Safety
Contraindications — Evidence Basis
Diuretic medications (loop diuretics, thiazides, aldosterone antagonists)
Lanostane triterpenoids act as aldosterone antagonists, enhancing urinary Na+/K+ excretion. Combined use with pharmaceutical diuretics may cause additive diuresis and electrolyte disturbance. Monitor electrolytes.
Immunosuppressive therapy
Poria polysaccharides are immunostimulatory; may theoretically reduce efficacy of immunosuppressants in autoimmune or transplant settings.
Hypoglycemic medications (insulin, metformin, sulfonylureas)
Pachymic acid increases GLUT4 expression and glucose uptake; may be additive with antidiabetic drugs. Monitor blood glucose.
Monitoring Parameters
Monitor during use, especially with prolonged or high-dose therapy.
Serum electrolytes (Na, K)
Every 3 months if used with diureticsAldosterone-antagonist effect of triterpenoids may cause electrolyte shifts
Blood glucose
Monthly in diabeticsHypoglycemic activity from pachymic acid-mediated GLUT4 upregulation
Toxicity
Generally regarded as safe at therapeutic doses. Long-term daily use at high doses (>15 g/day dried sclerotium) not formally studied.
Rare GI discomfort, diarrhea at high doses. Potential electrolyte disturbance with excessive diuretic co-use.
Reduce dose if GI adverse effects occur. Monitor electrolytes if combined with diuretics.
Adverse Effects
CYP Metabolism
Lanostane triterpenoids may inhibit CYP3A4 and CYP2E1 in vitro at high concentrations; clinical relevance at therapeutic doses not established. Exercise caution combining with narrow-therapeutic-index CYP3A4 substrates such as cyclosporine and tacrolimus.
swap_horiz Interactions
Antidiabetic Agents (Metformin, Insulin, Sulfonylureas)
Class: Antidiabetic
Dehydrotrametenolic acid isolated from Wolfiporia cocos sclerotia demonstrated insulin-sensitising activity in animal models of non-insulin-dependent diabetes mellitus, acting as a peroxisome proliferator-activated receptor (PPAR) agonist. This insulin-sensitising effect may enhance the glucose-lowering effects of antidiabetic agents.
Monitor blood glucose when adding Poria supplementation to an antidiabetic regimen. Advise patients on hypoglycemia recognition. Clinical significance is likely low at typical traditional doses.
Immunosuppressants (Cyclosporine, Tacrolimus, Sirolimus)
Class: Immunosuppressant
Lanostane-type triterpenes (pachymic acid, dehydrotrametenolic acid) from Wolfiporia cocos inhibit CYP3A4 and CYP2E1 in vitro at higher concentrations, potentially increasing plasma levels of CYP3A4-metabolised immunosuppressants. Additionally, Poria polysaccharides have immunomodulatory activities that may partially counteract immunosuppressant therapy.
Monitor cyclosporine and tacrolimus trough levels when Poria supplements are started or discontinued in transplant patients. Any unexpected rise in drug levels or immunosuppressant-related adverse effects (nephrotoxicity, neurotoxicity) should prompt review. Dose adjustments may be required.
CNS Depressants / Sedatives (Benzodiazepines, Zolpidem, Barbiturates, Antihistamines)
Class: CNS Depressant / Sedative
Poria cocos has been used for over 2000 years in Traditional Chinese Medicine as a mind-calming, insomnia-relieving agent. Lanostane triterpenoids in Poria may enhance GABAergic signalling and reduce CNS excitability, potentially potentiating the sedative effects of CNS depressant medications.
Caution when combining Poria with CNS depressants. Monitor for excessive sedation. Advise patients against driving or operating machinery when combining Poria supplements with sedative medications.
Diuretics (Furosemide, Hydrochlorothiazide, Bumetanide, Indapamide)
Class: Diuretic
Poria cocos exerts well-documented diuretic effects in traditional Chinese medicine (promoting urination and removing dampness). This diuretic activity is attributed to triterpenoid and polysaccharide components. Concurrent use with loop or thiazide diuretics may produce additive diuresis, increasing risk of dehydration, hypokalemia, and electrolyte imbalance.
Monitor electrolytes and fluid status in patients taking diuretics with Poria supplements. Encourage adequate hydration. Monitor potassium levels, especially in patients on digoxin where hypokalaemia increases toxicity risk.
Chemotherapy Agents (5-Fluorouracil, Oxaliplatin, Doxorubicin)
Class: Chemotherapy / Antineoplastic
A systematic review of 13 RCTs (N=940) examined herbal medicines as adjuncts to FOLFOX4 chemotherapy in stage IV colorectal cancer. Poria cocos was the sixth most common herb and improved tumour response rates, 1-year overall survival, quality of life, and reduced nausea/vomiting/neutropenia when combined with chemotherapy. Poria polysaccharides may reduce chemotherapy-induced gut mucosal damage via NF-κB and ROS pathway modulation.
Poria may be used as supportive adjuvant during chemotherapy, but only under oncology team supervision. Document use for interaction screening. Monitor for unexpected changes in chemotherapy toxicity profile.
Lithium (Lithium Carbonate, Lithium Citrate)
Class: Mood Stabilizer
Poria cocos has established diuretic properties. Diuretic-induced sodium depletion causes compensatory increases in proximal tubular sodium reabsorption, which simultaneously increases lithium reabsorption, raising serum lithium concentrations to potentially toxic levels. This mechanism applies to all diuretics, including herb-derived ones.
Monitor lithium serum levels if a patient on lithium therapy starts Poria supplements. Alert patient to symptoms of lithium toxicity: coarse tremor, confusion, ataxia, polyuria/polydipsia, cardiac arrhythmias. Advise adequate sodium and fluid intake.
hub Combinations
Synergistic pairings can enhance therapeutic outcomes, while knowing suitable substitutes helps when specific herbs are unavailable or contraindicated.
Synergistic Combinations
1Turkey Tail
Traditional UseCombined immunomodulatory beta-glucans with complementary structural diversity: Poria PCP (beta-1,3-glucan) + Turkey Tail PSK/PSP for overlapping but distinct receptor engagement (dectin-1, TLR2). Used in Japanese Kampo-adjacent formulas.
Preclinical rationale; both used in integrative oncology
Traditional Pairings
2Cordyceps
Traditional UseClassical TCM kidney/lung tonic pairing: Fu Ling (spleen/kidney strengthening, diuretic) + Dong Chong Xia Cao (lung/kidney tonification, energy). Combined in formulas for fatigue, respiratory weakness, and kidney deficiency.
Traditional Kampo/TCM pairing; clinical formula rationale
Reishi
Traditional UseClassical TCM combination: Fu Ling + Ling Zhi. Poria calms the Shen (spirit/mind) and drains dampness; Reishi nourishes the Heart and tonifies Qi. Combined in dozens of classical formulas for insomnia, anxiety, and immune support.
TCM classical pairing present in >100 historical formulas
science Studies
Effects of a combination of Poria Cocos, Ziziphus spinose, and gamma-aminobutyric acid (GABA) on sleep quality and skin health: A randomized double-blind placebo-controlled clinical trial
RCTThis 4-week, randomized, double-blind, placebo-controlled RCT enrolled 70 subjects with sleep disorders to receive a combination supplement (Poria cocos, Ziziphus spinosa, and GABA; 10 mL/day) or placebo. Total sleep duration increased significantly by 12.96% (p=0.006) and PSQI score decreased by 59.94% (p<0.001) in the active group, with significant superiority over placebo. Skin metrics including hydration, elasticity, wrinkle severity, and roughness were also significantly improved. No adverse effects were reported. Limitation: multi-ingredient formula prevents attribution to Poria cocos alone.
Efficacy of Poria Cocos Extract on Sleep Quality Enhancement: A Clinical Perspective with Implications for Functional Foods
ObservationalThis clinical pilot study administered 800 mg nightly of Poria cocos extract to 21 insomnia sufferers (mean age 55) and assessed sleep by polysomnography and sleep questionnaire. Total sleep duration increased significantly from 327.4 to 356.5 minutes (p=0.014), arousal duration decreased from 76.3 to 48.0 minutes (p=0.009), and sleep severity index improved significantly. The study identified optimal extraction conditions (75% ethanol) for sleep-active compounds. Limitations include a small, uncontrolled design without a placebo comparator.
medication Dosing
decoction
9–15 g dried sclerotium per 500 mL water
1–2x/day
Standard TCM decoction dose; pharmacopoeia range 10-15g per dose. Decoct 30-45 minutes. This primarily extracts beta-glucan polysaccharides. High-quality Yun Ling (Yunnan Poria) preferred.
hot_water_extract
1–3 g/day standardized extract (equivalent to 10–15 g dried sclerotium)
2x/day
Standardized 5:1 or 10:1 concentrated granule or capsule. For insomnia and anxiety: evening dosing. For edema/diuresis: morning dosing. Dual-extract captures both polysaccharides and triterpenoids for full-spectrum activity.
Disclaimer: This information is largely AI-generated and reviewed by human experts at Evara Health. It is intended for educational and clinical reference purposes only and should not replace professional medical advice.
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