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Cinnamon Bark

계피 (桂皮) · Cinnamomum cassia (L.) J.Presl
Interior-warming herb Very hot Sweet, pungent Kidney, Spleen, Heart, Liver
NatureVery hot
TasteSweet, pungent
MeridiansKidney, Spleen, Heart, Liver
Part usedBark
FamilyLauraceae
CategoryInterior-warming herb

Overview

Cinnamon bark is the great warmer of the traditional pharmacy. Where ginger warms the surface and the stomach, cinnamon is used for deep interior cold — cold limbs, cold abdominal pain, and weak constitutional fire. Koreans also know it as the fragrant base of sujeonggwa, the traditional cinnamon punch.

In the Donguibogam

東醫
寶鑑
性大熱 味甘辛 有小毒 主溫中 通血脈 利肝肺氣
Source: Donguibogam, Tangaek-pyeon (Herbology volume)
TranslationIts nature is very hot, its taste sweet and pungent, with slight toxicity. It chiefly warms the center, frees the blood vessels, and benefits the qi of the liver and lung.
This entry is a draft: the classical quotation is pending verification against the Korean Medicine Classics Database.

Traditional functions

  • Warms the interior, dispels deep cold
  • Invigorates blood circulation
  • Strengthens constitutional yang
  • Relieves cold-type pain

Traditional applications

  • Cold hands and feet
  • Cold-pattern abdominal pain
  • Menstrual pain aggravated by cold
  • Weak digestion with cold sensation

Traditional preparation

Decoction 1.5–4.5g, added near the end of boiling to preserve aromatics; also powdered in small amounts.

Cautions

Caution: Very hot in nature — traditionally contraindicated in heat patterns, fevers, and bleeding tendencies, and used with great caution in pregnancy. High doses of cassia contain coumarin, a consideration for liver health. Consult a professional.

Frequently asked questions

What is the difference between gyepi and yukgye?

Both come from cinnamon trees. In traditional terminology, thicker bark from the trunk (yukgye) was considered stronger for warming the interior, while thinner bark and twigs served slightly different roles. Modern commerce often blurs these distinctions.

Is culinary cinnamon the same as medicinal cinnamon bark?

Largely yes for cassia cinnamon, though medicinal grading favors thick, oily bark. Ceylon cinnamon (Cinnamomum verum) is a different species with a milder profile and much less coumarin.

Sources

  • 동의보감 탕액편 (원문) — 한문 원문 발췌 — 검증 예정 (DATA-001)
  • 한의학고전DB (mediclassics.kr) — 국역 참조 후 자체 재서술 (LEGAL-001)
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