Poria (Wolfiporia extensa, syn. Poria cocos)

Known as fu ling, this underground sclerotium-forming fungus is one of the most frequently used ingredients in Traditional Chinese Medicine — appearing in a huge number of classical formulas, almost always in combination with other herbs.

Not medical advice. For education only. Because poria is rarely used alone, individual effects are hard to isolate from clinical use in formulas.

What the evidence shows

Poria's triterpenoids and polysaccharides have documented diuretic, anti-inflammatory, and hepatoprotective activity in preclinical (cell and animal) research, and it acts as an aldosterone-receptor-binding compound with real pharmacological mechanism. Because poria is almost never studied or used alone in humans — it is a component of formulas like Wuling San — isolated clinical-trial evidence for poria by itself is thin.

Evidence level: preclinical for isolated poria; long, well-documented traditional-systematized use within TCM formulas.

How it's used

Dried sclerotium slices or powder, almost always combined with other herbs in a formula rather than taken alone.

Safety

Generally well tolerated at normal doses; occasional allergic reactions (itching, rash, nausea) have been reported. Poria appears in some formulas traditionally used during pregnancy under practitioner supervision, but safety data for isolated, concentrated poria extracts in pregnancy and breastfeeding are limited — avoid self-directed use in these periods and consult a qualified TCM practitioner or clinician.

Quality notes

Because poria is typically part of a formula, sourcing quality (proper species identification, no adulteration) matters more than isolated "active compound" percentages.

Sources

Explore the other medicinal mushrooms or our full plant catalogue.