Herb module

Jie Geng

Balloon Flower RootPlatycodon grandiflorum

Balloon flower root opens the Lung, clears Phlegm, soothes the throat, and carries a formula's other herbs upward.

Jie Geng is the root of the balloon flower, an herb Traditional Chinese Medicine has long relied on for the Lung and throat. It is used to open the Lung, spread Lung Qi, and help move Phlegm out. It also acts as a guide that lifts the other herbs in a formula toward the upper body, which makes it especially useful in Zoi's Lung Meridian™ formula.

Best functions

Traditionally used to open the Lung and spread and raise Lung Qi
Used to expel Phlegm and help clear pus
Benefits the throat and is used to open the voice
Directs the other herbs in a formula to the upper body
Research has looked at its compound platycodin D as an expectorant, and studies suggest soothing action in the respiratory tract

Fascinating facts

Balloon flower gets its name from its buds. Before they open, they puff up like little inflated balloons, then burst into star-shaped flowers, usually blue-violet.
In Korea the root, called doraji, is a familiar food. It is often prepared as a seasoned side dish.
Jie Geng is known as a guiding herb. It lifts and directs the other herbs in a formula to the upper body, a bit like an usher showing guests to their seats.
A traditional nickname for Jie Geng is "the upward boat." The image captures how it is said to carry the other herbs upward toward the chest and throat.

In Traditional Chinese Medicine

Jie Geng is neutral in nature, with a bitter and pungent flavor, and is considered a Dampness-resolving herb. It enters the Lung channel.

Go deeperDownload the fact sheet on the Lung Meridian page

Biomedical deep dive

Jie Geng Balloon Flower Root

From the Zoi Medicinals fact sheets’ Biomedical Details, with lines from Noa’s herb notes marked “Noa’s notes”.

On the fact sheet

Jie Geng (Balloon Flower Root, Radix Platycodi) is neutral and enters the LU channels; opens the lung, spreads Lung Qi, expels Phelgm and benefits the throat, expels pus, raises Lung Qi and directs other herbs to the upper body. Lung Meridian sheet

Key active constituents

The fact sheets don’t name constituents for this herb.

Pharmacology and mechanisms

The Lung Meridian sheet lists Platycodi (Jie Geng) among herbs with strong anti-inflammatory action specific to the respiratory tract.
Saponins (notably platycodin D) are expectorant: they thin mucus and help it clear. Noa’s notes
Anti-inflammatory: inhibits NF-κB (a master switch for inflammation) and lowers IL-1β and TNF-α. Noa’s notes
Immunomodulatory: activates macrophages (clean-up immune cells) and supports innate immunity. Noa’s notes

What the research says

Platycodon polysaccharides eased RSV-triggered damage and inflammation in airway lining cells (Li et al., Int Immunopharmacol 2022).

Safety, interactions and cautions

Every Zoi fact sheet: do not use if pregnant or breastfeeding unless directed by your health care practitioner.
Contraindicated with coughing up blood (hemoptysis). Noa’s notes

In these Zoi formulas

Lung Meridian (#5 on the fact sheet)

These statements have not been evaluated by the FDA. This product is not meant to diagnose, treat, cure or prevent any disease.