The Herb Cabinet 本草

桔梗 jié gěng

Platycodon grandiflorus · balloon flower root

Neutral Bitter · Pungent Lung

“The balloon flower's root is the pharmacy's boatman — it carries other herbs up to the throat and chest, and opens the lung's doors on the way.” — Lao Xinglin

What the tradition says

The garden balloon flower keeps a working root: jie geng opens and disseminates the lung qi, expels phlegm, and benefits the throat — coughs of either temperature, hoarseness, sore swollen throats^[1]. The tradition's favorite metaphor calls it the boatman (舟楫): added to a formula, it ferries the other herbs upward to the chest and throat, which is exactly its posting in Yin Qiao San^[1]. Paired with raw licorice it forms the two-herb throat classic Jie Geng Tang.

What the research says

Platycodon saponins (platycodin D) show expectorant and anti-inflammatory activity in laboratory models, and the root is eaten outright in Korea (doraji, the seasoned namul banchan) — a food-grade safety record with, as usual, no independent clinical trial base for the medical claims.

Where to be careful

Its saponins irritate in quantity — nausea at high doses — and the tradition withholds it in coughing of blood^[1]. Otherwise a gentle, food-adjacent root.

In the pharmacy

Pale cream taproots, sold sliced or whole — and in Korean groceries, pre-shredded for the dinner table. One plant, three aisles: garden, pharmacy, kitchen^[1].

Reviewed 2026-08-26