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Photo of dried gardenia fruit, small ovoid with six prominent reddish-orange ridges

Gardenia

梔子 · Zhī Zǐ

Cools the restless irritability that keeps you awake

Properties

CoolingCooling botanicalBitter, Cold

What it does

Gardenia fruit is for feeling irritable and wired at once, especially when it costs you sleep. In TCM it clears 'constrained heat,' the smoldering warmth that builds under stress and surfaces as insomnia and facial flushing. Practitioners also use it to move that warmth down and out through the urine, which is why it appears in formulas for burning urination. The charred form stops bleeding.

Safety

  • Bitter and cold. Avoid with cold-pattern digestion: loose stools, low appetite, or a pale tongue
  • Do not use for heat from deficiency (low-grade chronic deficiency heat without active fire signs)
  • Rare reports of allergic skin reactions
  • Talk to your doctor before starting medicinal use, especially if you take medication

How to take it

Drink

Decoct 6–9g of dried gardenia fruit in water for 25 minutes. Drink 1 cup, 1–2x daily. Almost always taken in formula with other heat-clearing or liver-soothing herbs.

Look for it in Jia Wei Xiao Yao San (Modified Free and Easy Wanderer) for irritability with heat

Where it comes from

Gardenia jasminoides has been cultivated in China for over 2,000 years, its white blossoms a feature of classical gardens and summer festivals. The small ribbed fruit, harvested in autumn when fully ripe, has been in the pharmacopeia since the Shén Nóng Běn Cǎo Jīng. It became central to Song-dynasty formulas and is still in Modified Free and Easy Wanderer. Good fruit is reddish-yellow and thin-skinned, with a ridged six-winged shape that stands out in an apothecary drawer.