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Botanical illustration of Cornus officinalis
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Cornus Fruit

산수유 (山茱萸) · Cornus officinalis Siebold & Zucc.
Kidney tonic (astringent) Slightly warm Sour, astringent Liver, Kidney
NatureSlightly warm
TasteSour, astringent
MeridiansLiver, Kidney
Part usedRipe fruit (pit removed)
FamilyCornaceae
CategoryKidney tonic (astringent)
Find by concern: Frequent urinationDizzinessFatigue

Overview

Cornus fruit is a foundational kidney-nourishing herb in Korean tradition, valued for strengthening what the classics call the lower back and knees. The Donguibogam notes its flesh tonifies while its seed has the opposite, dispersing effect — so the pit is always removed before use.

In the Donguibogam

東醫
寶鑑
性微溫, 味酸澁, 無毒. 强陰益精, 補腎氣.
Source: Donguibogam, Tangaek-pyeon (Herbology volume)
TranslationIts nature is slightly warm, its taste sour and astringent, and it is non-toxic. It strengthens yin and boosts essence, and tonifies kidney qi.

Traditional uses recorded in the Donguibogam

  • Tonifies the liver and kidney
  • Astringes essence, reduces excess discharge
  • Strengthens the lower back and knees
  • Reduces frequent urination

Traditional applications recorded in the classical text

  • Frequent urination, especially in older adults
  • Lower back and knee weakness
  • Dizziness from kidney-essence deficiency
  • General fatigue with aging

Traditional preparation

Pit removed; a core ingredient of Yukmi-jihwang-hwan (Six-Flavor Rehmannia Pill).

This describes traditional preparation recorded in the classics, not a recommendation for use today. DonguiHub does not provide dosage guidance — consult a qualified professional before using any herb.

Cautions

Caution: Traditionally avoided in damp-heat patterns or when urination is already difficult, since its astringent action may worsen retention. Consult a professional before use.
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Frequently asked questions

Why must the pit be removed?

The Donguibogam distinguishes the two parts sharply: the flesh tonifies and secures essence, while the seed has a dispersing, leaking effect — the opposite of what the herb is used for — so classical processing always discards the pit.

Why is it paired with rehmannia in Yukmi-jihwang-hwan?

This six-herb formula is the classic prescription for kidney-yin deficiency; cornus fruit's astringent, essence-securing action complements rehmannia's richer nourishing role.

Sources