The Herb Cabinet 本草

山茱萸 shān zhū yú

Cornus officinalis · Asiatic cornelian cherry

Slightly warm Sour · Astringent LiverKidney

“The sour little mountain fruit whose whole talent is holding on. Whatever the body is losing — sweat, essence, strength at the knees — this one grips.” — Lao Xinglin

What the tradition says

Where wu wei zi astringes the lung and heart, shan zhu yu is the liver and kidney's holder: intensely sour flesh of a mountain fruit, used for leaking essence, incontinence and frequent urination, drenching sweats of collapse, and the deep unsteadiness — sore back, weak knees, dizziness — of kidney depletion^[1]. In Liu Wei Di Huang Wan it deputies for rehmannia with a specific genius: it secures what the chief pours in, so the filling doesn't leak away^[1]. It also anchors the classical formulas for menstrual flooding.

What the research says

Cornus iridoids (loganin, morroniside) are laboratory subjects for metabolic and kidney-protective signals — animal work, mostly within studies of the six-ingredient formula itself rather than the lone fruit. No independent clinical case yet; filed as traditional.

Where to be careful

The astringent's standard rule: wrong when something should still be draining — acute urinary infection, damp-heat, a fever's sweat^[1]. Otherwise a gentle, food-adjacent fruit (Korea makes a tea and wine of it, sansuyu).

In the pharmacy

Wrinkled red-black flesh of Cornus officinalis fruits, pitted and dried — sour enough to pucker. Wine-steamed preparation deepens the tonic lean^[1].

Reviewed 2026-08-26