Zǐ Sū Zǐ (紫苏子), known in English as Perilla seed (Perilla frutescens (fruit)), is a warm, acrid Chinese herb from the Resolve phlegm category. It enters the Lung and Large Intestine channels. Its main action: directs qi downward, transforms Phlegm.

Illustration of Zǐ Sū Zǐ (Perilla seed), the dried herb
Illustration of the dried herb. Hear it pronounced in Mandarin:
PinyinZǐ Sū Zǐ (Zi Su Zi)
Chinese紫苏子
EnglishPerilla seed
Botanical namePerilla frutescens (fruit)
CategoryResolve phlegm
NatureWarm
FlavourAcrid
ChannelsLung, Large Intestine
Dosage3–10g
CautionsChronic cough from qi deficiency; Spleen deficiency with loose stools

Actions

  • Directs qi downward, transforms Phlegm
  • Stops cough, calms wheezing
  • Moistens intestines, unblocks bowels

Indications

  • Phlegm congestion with rebellious qi: cough and wheezing with copious Phlegm
  • Constipation from intestinal dryness

How to remember Zǐ Sū Zǐ

Most Resolve phlegm herbs enter the Lung channel.

You can work these out
Lung channel: from its action “transforms Phlegm”
Large Intestine channel: from its action “Moistens intestines”
Learn by heart
Warm: Resolve phlegm herbs vary in nature
Acrid: Resolve phlegm herbs vary in flavour

Formulas containing Zǐ Sū Zǐ

Other Resolve phlegm herbs

Test yourself

What is the nature and flavour of Zǐ Sū Zǐ?

Zǐ Sū Zǐ is warm and acrid.

Which channels does Zǐ Sū Zǐ enter?

Zǐ Sū Zǐ enters the Lung and Large Intestine channels.

What are the actions of Zǐ Sū Zǐ?

Directs qi downward, transforms Phlegm; Stops cough, calms wheezing; Moistens intestines, unblocks bowels.

What is Zǐ Sū Zǐ used for?

Phlegm congestion with rebellious qi: cough and wheezing with copious Phlegm; constipation from intestinal dryness.

Which formulas contain Zǐ Sū Zǐ?

Sū Zǐ Jiàng Qì Tāng and Dìng Chuǎn Tāng.

Practise Zǐ Sū Zǐ and the other 290 herbs

Recognise each herb from its picture, recall its nature, flavour, channels and actions, and review it again just before you would forget it.

Try the 5-question herb quiz

Or practise a TCM case

Shen Study is a study tool. Doses and cautions are as taught in standard Chinese materia medica texts; they are not prescribing advice.