Balloon-Flower

Botanical

What is it

Balloon flower (Platycodon grandiflorum) is a perennial flowering plant native to East Asia. Its root, called doraji in Korean or jie geng in Chinese, is used both as a vegetable and a traditional medicine for cough, sore throat, and respiratory conditions.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Cough and respiratory symptoms

Limited Evidence

Traditional cough remedy; some small modern trials and animal data support expectorant effect.

Sore throat

Mixed Evidence

Used traditionally; limited modern human evidence.

How it works

The root is rich in triterpenoid saponins (platycodins, especially platycodin D) and inulin-type polysaccharides. Platycodins have demonstrated expectorant, anti-inflammatory, and immunomodulatory activity in laboratory and animal studies. The expectorant effect is thought to involve reflex stimulation of bronchial secretion.

Dosage

Traditional decoction: 3 to 9 grams of dried root per day. Standardized extracts vary.

When and how to take it

Traditionally taken 2 to 3 times daily for respiratory symptoms.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried root (jie geng / doraji)

Whole or sliced dried root used in herbal preparations and food.

Decocted.

Standardized platycodin extract

Concentrated extracts in capsules.

Variable.

Safety

Generally well tolerated at traditional doses. High or prolonged doses may cause nausea, vomiting, or hemolysis (saponin-related). Allergic reactions are possible.

Who should be cautious

Avoid in pregnancy and breastfeeding due to lack of safety data. Caution in peptic ulcer disease as saponins can irritate GI. People with bleeding disorders or on anticoagulants should consult a clinician.

Interactions

No major drug interactions are well documented. Theoretical additive effects with expectorants or anticoagulants are possible at high doses.

Food sources

Doraji root (Korean cuisine)

Amount
30 g fresh
%DV
—

Frequently asked questions

Is balloon flower the same as platycodon?⌄

Yes. Platycodon grandiflorum is the scientific name.

Is the root edible?⌄

Yes, when properly prepared. It is a traditional Korean vegetable (doraji).

References

Balloon-Flower on Wikidata — Wikidata link

Balloon-Flower on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Balloon-Flower (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.