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Herb library · Herb · Gardenia jasminoides

Gardenia fruit (zhizi)

The orange, six-ribbed fruit of the fragrant gardenia, a yellow dye and a common ingredient of Chinese and Japanese herbal formulas. Years of taking formulas that contain it have been linked to a rare, serious disease of the veins of the colon.

Serious warning

Long-term use of herbal medicines containing gardenia fruit has been linked to mesenteric phlebosclerosis, in which the veins of the colon thicken and calcify, causing pain, diarrhea and bowel blockage. It has been reported in people who took Japanese Kampo formulas or Chinese herbal liquids containing gardenia or its compound geniposide for years (PubMed 34341949, 34168411).

Traditional use

Stuart's 1911 English guide to the Chinese materia medica, following Li Shizhen's Bencao Gangmu, records that the small fruits were prescribed for fevers, fluxes, dropsies, lung diseases and jaundice, that the pulp of the larger fruits was put on swellings, injuries, dog bites and slight burns, and that the fruits dyed cloth a bright yellow while the fragrant flowers scented tea and were worn in the hair. Gardenia fruit is still an ingredient of many Chinese formulas and Japanese Kampo medicines.

What studies show

  • Insufficient

    Fever, jaundice and the other traditional uses: no trial of gardenia fruit on its own in people was found. The studies that include it test multi-herb formulas.

Be careful of

Cautions

  • NoteIf you take a Chinese or Kampo formula every day for months or years, check whether it contains gardenia fruit (zhizi, shanzhizi or sanshishi) and tell your clinician about any long-lasting belly pain or diarrhea.
  • AllergyA skin eruption that leaves dark patches has been reported with gardenia fruit.
  • NoteSome Chinese herbal products have been contaminated with heavy metals, pesticides or other herbs, according to NCCIH.
  • PregnancyNo safety information for medicinal use in pregnancy or breastfeeding was found; avoid it then.
  • Ask a clinicianTalk with a clinician or pharmacist before using gardenia fruit or a formula containing it if you take prescription medicines, are pregnant or breastfeeding, or are giving it to a child.

From the old books

What herbals and dispensaries of the past printed. History, in their words.

“The medicinal uses of the smaller fruits are various ; they being prescribed in fevers, fluxes, dropsies, lung diseases, jaundice, and externally as a vulnerary remedy.”
G. A. Stuart, Chinese Materia Medica: Vegetable Kingdom (1911), p. 184. See the page of Chinese Materia Medica: Vegetable Kingdom, p. 184 (opens in a new tab) · Read the full passage from Chinese Materia Medica: Vegetable Kingdom, p. 184

Sources

  1. Mesenteric phlebosclerosis associated with the oral intake of Japanese traditional (Kampo) medicines containing Gardeniae Fructus (Clin J Gastroenterol, 2021) — PubMed record (opens in a new tab) · NIH · read September 25, 2026
  2. Idiopathic mesenteric phlebosclerosis associated with long-term oral intake of geniposide (World J Gastroenterol, 2021) — PubMed record (opens in a new tab) · NIH · read September 25, 2026
  3. Idiopathic mesenteric phlebosclerosis initially misdiagnosed as bowel obstruction: a case report (Front Med, 2026) — PubMed record (opens in a new tab) · NIH · read September 25, 2026
  4. Idiopathic Mesenteric Phlebosclerosis Presenting as Recurrent Diarrhea (J Gastrointestin Liver Dis, 2026) — PubMed record (opens in a new tab) · NIH · read September 25, 2026
  5. Hyperpigmented Drug Eruption Caused by Sanshishi (Gardenia Fruit): A Rare and Potentially Overlooked Skin Manifestation (J Dermatol, 2025) — PubMed record (opens in a new tab) · NIH · read September 25, 2026
  6. Traditional Chinese Medicine: What You Need To Know (opens in a new tab) · NCCIH · read September 25, 2026

Reviewed September 25, 2026.