Zhen Ren Yang Zang Tang (真人养脏汤) — True Person Decoction

Zhen Ren Yang Zang Tang is a classical Chinese herbal formula used primarily for chronic non-infective diarrhoea from cold-deficient pattern. It is prescribed for chronic diarrhoea from Spleen-Kidney Yang deficiency with leakage:

On this page

1. Overview
2. TCM pattern
3. Key herbs
4. Formula actions
5. Conditions treated
6. Comparisons with related formulas
7. Cautions
8. Frequently asked questions

Overview

Zhen Ren Yang Zang Tang — the “True Person’s Decoction to Nourish the Viscera’ — is a Song-dynasty formula from the Tai Ping Hui Min He Ji Ju Fang. It addresses chronic diarrhoea from Spleen-Kidney Yang deficiency with leakage of Qi — the picture of prolonged, exhausting diarrhoea that has depleted both the digestive function and the body’s ability to hold the bowel.

The formula combines tonifying herbs (Ren Shen, Bai Zhu, Dang Gui, Bai Shao), warming herbs (Rou Gui, Mu Xiang), and astringent herbs (He Zi, Rou Dou Kou, Ying Su Ke). The astringent Ying Su Ke (poppy husk) historically gave this formula its remarkable effectiveness but is a controlled substance in most modern jurisdictions.

I prescribe Zhen Ren Yang Zang Tang as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan. Modern preparations use legal substitutions where required.

TCM pattern

Zhen Ren Yang Zang Tang is prescribed for chronic diarrhoea from Spleen-Kidney Yang deficiency with leakage:

• Chronic, long-standing diarrhoea — often months or years
• Mucous, possibly clear or fatty stools
• Frequent stools, possibly with urgency
• Cold lower abdomen with mild dull ache
• Faecal incontinence in severe cases
• Rectal prolapse
• Fatigue, lassitude, weight loss
• Pale complexion
• Tongue — pale, possibly swollen, white moist coat
• Pulse — deep, weak, slow

Key herbs

1. Ren Shen (Rx. Ginseng, 3-20g) — tonifies Spleen Qi
2. Bai Zhu (Rz. Atractylodis, 9-20g) — tonifies Spleen and dries Damp
3. He Zi (Terminalia chebula, 6-36g) — astringes Large Intestine
4. Rou Dou Kou (nutmeg, 6-30g) — warms middle, astringes
5. Ying Su Ke (poppy husk, 6-108g) — powerfully astringes Large Intestine (CONTROLLED SUBSTANCE)
6. Rou Gui (Cx. Cinnamomi, 3-24g) — warms Kidney Yang
7. Mu Xiang (Rx. Aucklandiae, 6-42g) — moves Qi, prevents stagnation
8. Dang Gui (Rx. Angelicae Sinensis, 6-18g) — nourishes Blood
9. Bai Shao (Rx. Paeoniae Alba, 9-48g) — nourishes Blood, softens Liver
10. Zhi Gan Cao (Fried Rx. Glycyrrhizae, 3-24g) — harmonises

Formula actions

1. Warms and tonifies Spleen-Kidney Yang
2. Astringes the Large Intestine
3. Stops chronic diarrhoea
4. Nourishes Qi and Blood

Conditions treated

1. Chronic non-infective diarrhoea from cold-deficient pattern
2. Inflammatory bowel disease — Crohn’s and ulcerative colitis chronic phase (alongside conventional care) — see Crohn’s and UC
3. Microscopic colitis
4. IBS[5]-D with cold-deficient pattern — see IBS
5. Faecal incontinence
6. Rectal prolapse
7. Chronic infective diarrhoea after the acute phase
8. Post-radiation enteritis
9. Chronic short-bowel syndrome (alongside conventional management)

Comparisons with related formulas

• Si Shen Wan — for Kidney Yang deficiency early-morning diarrhoea (cock-crow diarrhoea); simpler formula.
• Li Zhong Wan — for Spleen Yang deficiency diarrhoea without leakage.
• Bu Zhong Yi Qi Tang — for Spleen Qi sinking with mild chronic diarrhoea.
• Tao Hua Tang — for severe cold-deficient bloody diarrhoea.

Cautions

Ying Su Ke (poppy husk) is a controlled substance in the UK, US, EU and most countries. Modern Sun Ten preparations may substitute or omit this herb depending on jurisdiction. Self-importing the classical formula is dangerous and may be illegal.

Not appropriate for acute diarrhoea, infective diarrhoea, food poisoning or damp-heat diarrhoea — the astringents will trap the pathogen.

Persistent diarrhoea needs medical investigation to exclude inflammatory bowel disease, microscopic colitis, infection, malabsorption (coeliac, pancreatic insufficiency) and bowel cancer.

Always consult a qualified Chinese herbalist registered with the RCHM.

Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide.

Frequently asked questions about Zhen Ren Yang Zang Tang

What is Zhen Ren Yang Zang Tang used for?

Zhen Ren Yang Zang Tang is used for chronic non-infective diarrhoea from cold-deficient pattern, inflammatory bowel disease — crohn’s and ulcerative colitis chronic phase (alongside conventional care) — see crohn’s and uc, microscopic colitis, ibs-d with cold-deficient pattern — see ibs, faecal incontinence. The formula targets the underlying TCM pattern producing these symptoms rather than the symptom in isolation, which is why pattern diagnosis by a qualified herbalist is essential.

How does Zhen Ren Yang Zang Tang work?

The herbs in Zhen Ren Yang Zang Tang work together: Ren Shen (Rx. Ginseng, 3 20g) — tonifies spleen qi; Bai Zhu (Rz. Atractylodis, 9 20g) — tonifies spleen and dries damp; He Zi (Terminalia chebula, 6 36g) — astringes large intestine; Rou Dou Kou (nutmeg, 6 30g) — warms middle, astringes. The synergy of these actions addresses the underlying TCM pattern.

How long does Zhen Ren Yang Zang Tang take to work?

For most patients, an improvement is typically noticed within 2–4 weeks of daily granule treatment. Full benefit usually requires 6–12 weeks, depending on how long-standing the underlying pattern is. Zhen Ren Yang Zang Tang is typically prescribed as part of an individualised treatment plan that may include other herbs or adjustments over time.

Is Zhen Ren Yang Zang Tang safe in pregnancy?

Use of Zhen Ren Yang Zang Tang in pregnancy should only be considered under the supervision of a qualified RCHM herbalist with pregnancy training, and only when the TCM pattern specifically calls for it.

Who should not take Zhen Ren Yang Zang Tang?

Ying Su Ke (poppy husk) is a controlled substance in the UK, US, EU and most countries. Modern Sun Ten preparations may substitute or omit this herb depending on jurisdiction. Self-importing the classical formula is dangerous and may be illegal. Not appropriate for acute diarrhoea, infective diarrhoea, food poisoning or damp-heat diarrhoea — the astringents will trap the pathogen. Persistent diarrhoea needs medical investigation to exclude inflammatory bowel disease, microscopic colitis, infection, malabsorption (coeliac, pancreatic insufficiency) and bowel cancer. Always consult a qualified Chinese herbalist registered with the RCHM. Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide. Zhen Ren Yang Zang Tang must be prescribed only after full pattern diagnosis by a qualified RCHM herbalist; self-prescription is not appropriate.

References

[5] Liu Q, Shi Z, Zhang T, Jiang T, Luo X, Su X, Yang Y, Wei W. Efficacy and Safety of Chinese Herbal Medicine Xiao Yao San in Functional Gastrointestinal Disorders: A meta-Analysis and Trial Sequential Analysis of Randomized Controlled Trials. Front Pharmacol. 2022 Jan 19;12:821802. https://doi.org/10.3389/fphar.2021.821802. PMID: 35126152.