Tree barks and root barksPhlegm-resolvingCortex Mori

Sang Bai Pi (Mulberry Root Bark)

桑白皮 · Sang Bai Pi

Phlegm-resolving herb in Traditional Chinese Medicine. Traditional functions: Drains lung, calms panting, promotes urination, eliminates swelling.

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Quick Facts

Latin NameCortex Mori
Chinese Name & Pinyin桑白皮 · Sang Bai Pi
Medicinal PartTree barks and root barks
Efficacy CategoryPhlegm-resolving
Botanical OriginThe dried root bark of Morus alba L.(Moraceae)
Nature & FlavourSweet; Cold
Channels EnteredLung

What Is Sang Bai Pi?

Sang Bai Pi (Mulberry Root Bark) is a medicinal herb of Traditional Chinese Medicine.

Primarily produced in the Chinese provinces of Zhejiang, Jiangsu, Anhui, Hunan, Sichuan.

Nature & Flavour: Sweet; Cold
Channels Entered: Lung

Sang Bai Pi: Materia Medica Profile

Identification & Quality Standard

Cortex Mori

Botanical Origin

The dried root bark of Morus alba L.(Moraceae)

Production Regions

Primarily produced in the Chinese provinces of Zhejiang, Jiangsu, Anhui, Hunan, Sichuan.

Quality Requirements

Superior medicinal material is white, thick, powdery.

Macroscopic Features

Long strip-like grooved shape, left and right sides rolled inward, rolled edge is half-tube-like, center of the groove is long, twisted and flaky, tube-like or groove-like with both sides rolled inward, uneven length and width, 0.1~0.5cm thick. Outer surface is pale yellowish-white or grayish-yellow, smooth, with thin longitudinal lines, with longitudinal crack, expanded fibers. Light and pliable texture, difficult to break, can be easily torn longitudinally, with white powder when tearing; faint odor, slightly sweet taste.

Traditional TCM Properties

Sweet; ColdLung

Traditional Functions

Drains lung, calms panting, promotes urination, eliminates swelling. Apply to cough due to lung heat, facial edema, difficulty in micturition.

How Sang Bai Pi Is Used in TCM

In the Chinese materia medica, Sang Bai Pi is classified among the Phlegm-resolving herbs. It appears in 7 classical formulas in our library.

Formulas containing Sang Bai Pi are traditionally used for:

EdemaBloatingFrequent UrinationPoor AppetiteCoughDry CoughFeverAsthma & WheezingSore Throat

Classical Formulas Containing Sang Bai Pi

+3 more

Herbs Commonly Combined with Sang Bai Pi

Sheng Jiang PiFu Ling PiChen PiDa Fu PiDi Gu PiGan CaoJing MiMa HuangZi Su ZiXing RenChi Fu LingHuang Qin

Frequently Asked Questions

What is Sang Bai Pi? Are Sang Ye, Sang Zhi and Di Gu Pi the same?
Official Sang Bai Pi (桑白皮) is the dried root bark of Morus alba. The pharmacopoeial name is Mori Cortex. Sang Ye is sweet-bitter-cold: disperses wind-heat, clears the Lung, moistens dryness and clears the Liver to brighten the eyes. Sang Zhi is slightly bitter and neutral: dispels wind-damp and benefits the joints. Di Gu Pi is sweet-cold: cools Blood, eliminates steaming, clears the Lung and downbears fire. Write Sang Bai Pi or honey-fried Sang Bai Pi. Use caution when the Lung is cold and without fire.
What are the TCM properties and traditional uses of Sang Bai Pi?
According to the Chinese Pharmacopoeia, Sang Bai Pi is sweet and cold, enters the Lung channel, and acts to drain the Lung and calm wheezing, promote urination and disperse swelling. It is used for Lung-heat wheezing and cough, edema with distention and scant urine, and swelling of the face, eyes and skin. Sweet-cold and Lung-draining, it suits Lung-heat congestion and water-qi that fails to move—not Lung cold without fire or wind-cold cough.
How do you choose raw versus honey-fried Sang Bai Pi? Can Sang Ye replace it?
Lung-heat wheezing and promoting urination more often use the raw bark. Lung vacuity with heat, when a milder drain is wanted, uses honey-fried Sang Bai Pi (honey-fry until not sticky). Mulberry leaf disperses wind-heat and clears the Lung; it cannot replace draining the Lung and promoting urination by equal weight.
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Learn More About Sang Bai Pi

Explore our in-depth article covering the traditional uses, properties, functions, and TCM context of Sang Bai Pi.

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Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.

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