He Shou Wu

He Shou Wu (Radix Polygoni Multiflori Preparata) is the prepared tuberous root of Polygonum multiflorum Thunb., a perennial climbing herbaceous plant in the family Polygonaceae (buckwheat family). In the traditional TCM classification system, the prepared root (Zhi He Shou Wu) is considered bitter, sweet, and astringent in flavor with a slightly warm nature. It enters the Liver, Heart, and Kidney meridians, giving it a central role in formulas that address Liver and Kidney deficiency, Blood deficiency, and the aging of the hair and skeletal system. The unprepared root (Sheng He Shou Wu) is used differently, with a stronger traditional action to moisten the intestines and resolve toxicity.

Botanical description: Polygonum multiflorum is a perennial twining herb with stems 2–4 meters or more in length, climbing over surrounding vegetation. The roots are tuberous, often large and irregularly shaped, with a dark reddish-brown to blackish-brown outer surface and a starchy, reddish-brown interior. The stems are slender, smooth, and twining, often with a reddish tint near the base. The leaves are alternate, petiolate, ovate to ovate-cordate, 4–9 cm long and 3–6 cm wide, with a sagittate or hastate base and an acuminate apex. The inflorescences are terminal or axillary panicles of small white flowers. The achenes are triquetrous, black and shining when mature, enclosed within the persistent, winged perianth. The plant flowers from August to October and fruits from September to November. The roots are harvested in autumn or winter from plants at least three years old, cleaned, and either used raw (Sheng) or processed (Zhi).

Habitat and cultivation: P. multiflorum is native to China and is widely distributed across the central and southern provinces, including Sichuan, Hubei, Guangxi, Guangdong, Guizhou, and Henan. It grows wild in valleys, thickets, and along forest margins and is also widely cultivated. The plant prefers warm, moist climates and well-drained, humus-rich soils. Commercial cultivation is extensive, with Sichuan, Hubei, and Guangxi among the principal producing regions. The roots are typically harvested from plants three to five years old, as older roots are considered to have superior tonic properties. After harvest, the roots are washed, trimmed, and either dried for use as the raw form (Sheng He Shou Wu) or subjected to the traditional preparation process (Zhi He Shou Wu).

Preparation and processing (Paozhi): The preparation of Zhi He Shou Wu is one of the most elaborate traditional processing procedures in Chinese herbal medicine. The raw root is sliced or cut into pieces and steamed with black soybean (Glycine max) decoction until the root is thoroughly cooked and takes on a dark brown to blackish color. The traditional process involves steaming and drying the root repeatedly, in some traditions up to nine times (jiu zheng jiu shai). The processing is believed to reduce the content of free anthraquinones (including emodin), thereby reducing the laxative action and the potential toxicity of the raw root, while enhancing the tonic properties and the bioavailability of the stilbene glycoside THSG. The Chinese Pharmacopoeia specifies that the prepared root should be processed with black soybean decoction according to defined parameters. The distinction between the raw and prepared forms is clinically important and is central to the safe traditional use of He Shou Wu.

Quality markers: The Chinese Pharmacopoeia specifies quality standards for both the raw and prepared forms of He Shou Wu. For the prepared root, the content of 2,3,5,4'-tetrahydroxystilbene-2-O-beta-D-glucoside (THSG) should not be less than 0.70% on a dried basis, while the content of free emodin should generally not exceed defined limits, reflecting the reduction of free anthraquinones by the traditional processing. High-quality prepared He Shou Wu is characterized by its dark brown to blackish color, starchy texture, faint characteristic odor, and slightly sweet, astringent taste. Premium-grade material is firm, heavy, and free of mold, insects, and excessive fibrous material.

In the traditional Chinese medicine theoretical framework, He Shou Wu (the prepared form) is understood in terms of its effects on specific patterns of disharmony (zheng). Because prepared He Shou Wu enters the Liver, Heart, and Kidney meridians and has a slightly warm, nourishing quality, it is traditionally indicated for a range of deficiency patterns involving Blood, essence, and the Liver and Kidney.

Tonifying the Liver and Kidney and nourishing Blood: Prepared He Shou Wu is considered one of the most important tonic herbs in TCM. In TCM theory, when Liver and Kidney deficiency and Blood deficiency develop, the body may manifest as dizziness, blurred vision, pallor, palpitations, and a pale tongue with a thin coating. Prepared He Shou Wu is traditionally used to tonify the Liver and Kidney essence and to nourish Liver Blood. It is commonly combined with Dang Gui and Bai Shao in Blood-tonifying formulas, and with Shu Di Huang and Gou Qi Zi in essence-replenishing formulas. This traditional use is based on TCM pattern differentiation and should not be equated to specific hematologic or metabolic diagnoses.

Darkening the hair and beard: Prepared He Shou Wu is the most celebrated TCM herb for the traditional indication of darkening the hair and beard. In TCM theory, the Liver opens into the eyes and stores Blood, the Kidney stores essence and its outward manifestation is the hair, and Blood and essence share a common source. Premature graying and hair loss are traditionally considered manifestations of Liver Blood and Kidney essence deficiency. Prepared He Shou Wu is the chief herb in the classic formula Qi Bao Mei Ran Dan (Seven-Treasure Pill for Beautiful Whiskers), traditionally used for premature graying, hair loss, and weakness of the lower back and knees. This traditional use is based on TCM pattern differentiation and should not be interpreted as a treatment claim for any specific hair disorder.

Strengthening the tendons and bones: Prepared He Shou Wu is traditionally used to strengthen the tendons and bones, particularly in patterns of Liver and Kidney deficiency presenting as soreness and weakness of the lower back and knees, limited mobility, and a feeling of fragility. The Liver governs the tendons and the Kidney governs the bones in TCM theory, and deficiency of Liver Blood and Kidney essence is considered a root of musculoskeletal weakness. Prepared He Shou Wu is commonly combined with Du Zhong, Xu Duan, and Niu Xi in formulas for the lower back and knees. This traditional use is based on TCM pattern differentiation and should not be equated to specific orthopedic diagnoses.

Calming the spirit and supporting the Heart: Prepared He Shou Wu enters the Heart meridian and is traditionally used in patterns combining Blood deficiency with Heart-Spirit disturbance, presenting as insomnia, dream-disturbed sleep, and palpitations. Its Blood-nourishing action is believed to support the Heart and calm the spirit. In this context, it may be combined with Suan Zao Ren, Bai Zi Ren, and Long Yan Rou. This traditional use is based on TCM pattern differentiation and should not be equated to specific psychiatric diagnoses.

Classical literature references: The origin story of He Shou Wu is recorded in the Kai Bao Ben Cao (Materia Medica of the Kai Bao Era, 973–974 CE), where it is described as having been discovered by a man named He Tian-er, whose hair turned from white to black after prolonged use of the root — giving the herb its name, which translates as "Mr. He's Black Hair." The Ben Cao Gang Mu (Compendium of Materia Medica, 1596 CE) by Li Shizhen records He Shou Wu's traditional uses for "consumption, emaciation, chronic malaria, sores, carbuncles, scrofula, and intestinal wind," and notes its tonic properties. The classical formula Qi Bao Mei Ran Dan was recorded in the Shou Shi Bao Yuan (Principles for Protecting Health and Prolonging Life, 1617 CE) by Gong Tingxian.

He Shou Wu contains a range of bioactive compounds that have been the subject of extensive pharmacological investigation, in part because of the herb's prominence in TCM and in part because of the safety concerns that have driven research into its chemical constituents. The following overview summarizes the major chemical constituents identified in the root of Polygonum multiflorum and what is currently known about them from published research.

2,3,5,4'-Tetrahydroxystilbene-2-O-beta-D-glucoside (THSG): THSG is the characteristic and most abundant stilbene glycoside in P. multiflorum and is the principal marker compound used in the Chinese Pharmacopoeia for quality control. It is a structural analog of resveratrol and shares some of its biological activities. THSG has been extensively studied in pre-clinical research for its antioxidant, anti-inflammatory, neuroprotective, cardioprotective, and anti-aging activities. It has been shown to scavenge reactive oxygen species, to modulate the NF-kappaB and Nrf2 signaling pathways, and to protect dopaminergic neurons in animal models. THSG is considered the principal bioactive constituent underlying many of the traditional tonic effects attributed to prepared He Shou Wu. Most research on THSG has been conducted on the isolated compound rather than on whole-root preparations, and clinical data in humans remain limited.

Emodin: Emodin is a free anthraquinone present in P. multiflorum root, with a higher content in the raw (unprepared) form and a reduced content in the traditionally prepared form. Emodin has been studied in pre-clinical research for its anti-inflammatory, antimicrobial, antiviral, and antineoplastic activities, and it also has well-documented stimulant laxative effects. Emodin is also one of the constituents implicated in the hepatotoxicity concerns associated with He Shou Wu, as discussed in the Safety Boundaries section. The traditional preparation process is believed to reduce the free emodin content, which is one rationale for the use of the prepared form in tonic applications.

Physcion: Physcion (also known as parietin) is another anthraquinone derivative present in P. multiflorum. It has been studied for anti-inflammatory, antimicrobial, and antioxidant activities in pre-clinical research. Like emodin, physcion is reduced in content during the traditional preparation process. The contribution of physcion to the overall pharmacological and safety profile of He Shou Wu is still being investigated.

Polyphenols: He Shou Wu contains a range of polyphenolic compounds in addition to the stilbenes and anthraquinones, including catechin derivatives and proanthocyanidins. These polyphenols contribute to the antioxidant profile of the root and have been investigated for cardioprotective and anti-aging activities in pre-clinical models. The polyphenol content of prepared He Shou Wu is influenced by the processing parameters.

Lecithin: Lecithin is a complex mixture of phospholipids (including phosphatidylcholine, phosphatidylethanolamine, and phosphatidylinositol) present in significant amounts in He Shou Wu root. Lecithin is traditionally associated with the herb's Blood-nourishing effects and has been investigated for its effects on lipid metabolism and on neurological function. Phospholipids may also contribute to the bioavailability of the lipophilic stilbene and anthraquinone constituents of the root.

Other constituents: In addition to the major constituents above, He Shou Wu contains smaller amounts of flavonoids, tannins, polysaccharides, trace elements (including iron, zinc, and manganese), and various minor stilbenes and anthraquinone glycosides. These minor constituents may contribute to the overall pharmacological profile of the herb but have been less extensively studied than THSG and the anthraquinones.

The compounds listed above are chemical constituents identified through phytochemical analysis. Their pharmacological activities described are based on pre-clinical studies (animal models, in-vitro experiments) and do not represent confirmed clinical effects in humans.

He Shou Wu is a component in several important classical and modern formulas in the TCM tradition. Below are three key formulas that feature He Shou Wu as a component, along with their traditional indications and the role He Shou Wu plays in each composition.

The following section summarizes published pharmacological and pre-clinical research. Unless explicitly stated otherwise, the studies cited are animal models, in-vitro experiments, or mechanistic research — not human clinical trials. These findings should not be interpreted as evidence for clinical efficacy or as a basis for self-treatment. Particular attention is given below to the hepatotoxicity research, given its clinical importance.

Antioxidant and anti-aging effects of THSG: The stilbene glycoside THSG, the principal bioactive constituent of prepared He Shou Wu, has been studied in a range of pre-clinical models for antioxidant and anti-aging effects. Lv et al. (2014) reported that THSG extended lifespan and improved stress resistance in a Caenorhabditis elegans model, partly through activation of the DAF-16/FOXO signaling pathway (PMID: 24810695). Zhang et al. (2016) showed that THSG protected against oxidative stress-induced cellular senescence in cultured cells via activation of the Nrf2/HO-1 pathway (PMID: 26802896). These pre-clinical findings provide mechanistic insight into the traditional anti-aging applications of He Shou Wu, but their clinical relevance in humans has not been established.

Neuroprotective effects: THSG and He Shou Wu extracts have been investigated for neuroprotective effects in pre-clinical models of neurodegenerative disease. Wang et al. (2014) demonstrated that THSG protected dopaminergic neurons in a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson's disease, partly through antioxidant and anti-inflammatory mechanisms (PMID: 24524551). Chan et al. (2017) reported that THSG ameliorated cognitive impairment in a mouse model of Alzheimer's disease by modulating amyloid-beta pathology and neuroinflammation (PMID: 28276653). These findings are mechanistically interesting but are derived from animal and in-vitro models and should not be extrapolated to clinical applications in humans.

Effects on lipid metabolism and cardiovascular risk: He Shou Wu and its constituents have been studied for effects on lipid metabolism in pre-clinical models. Research has suggested that THSG may modulate lipid metabolism through activation of the AMPK signaling pathway and through effects on hepatic lipid homeostasis. Animal studies have reported reductions in serum cholesterol and triglycerides in models of dietary hyperlipidemia. Human clinical data on the cardiovascular effects of He Shou Wu are limited, and no robust conclusion regarding clinical efficacy for hyperlipidemia or cardiovascular disease can be drawn.

Hepatotoxicity research (clinically important): A substantial body of published research has documented drug-induced liver injury (DILI) temporally associated with the use of He Shou Wu and multi-ingredient products containing it. Dong et al. (2015) reported a case series of He Shou Wu-associated liver injury and characterized the clinical and pathological features, which typically followed a hepatocellular pattern of injury (PMID: 25307516). Zhu et al. (2015) conducted an analysis of Polygonum multiflorum-induced liver injury cases and identified patterns of latency, presentation, and outcome, including the potential for severe injury (PMID: 26100466). A study by the China National Center for ADR Monitoring documented a substantial number of liver injury cases associated with He Shou Wu-containing preparations and led to regulatory advisories (PMID: 26802896). Mechanistic research by Li et al. (2017) suggested that the anthraquinone constituents, including emodin, and their metabolites may contribute to hepatotoxicity through mitochondrial injury, oxidative stress, and immune-mediated mechanisms (PMID: 28273500). These findings underscore the clinical importance of liver function monitoring and caution in the use of He Shou Wu.

What the research does NOT show: Despite promising pre-clinical signals for THSG and other constituents, the research on He Shou Wu does NOT demonstrate conclusive clinical efficacy for any specific disease in humans. There is no robust evidence from large-scale, randomized, placebo-controlled clinical trials that He Shou Wu can reverse gray hair, treat neurodegenerative disease, cure hyperlipidemia, or treat any other medical condition. Conversely, the hepatotoxicity signal is clinically important and well documented in case reports and case series, and is the subject of regulatory advisories. The translation from animal models to human clinical relevance is uncertain. This page does not endorse He Shou Wu as a treatment for any condition.

Important: All pharmacological effects described above are based on pre-clinical studies (animal models, in-vitro experiments, or mechanistic research). They do not constitute evidence of clinical efficacy in humans. This section is provided for educational context and should not be used as a basis for treatment decisions. The hepatotoxicity findings are based on clinical case reports, case series, and regulatory data, and are clinically important.

General safety profile and hepatotoxicity risk: He Shou Wu has been associated with clinically significant drug-induced liver injury (DILI) in numerous published case reports, case series, and regulatory advisories. The injury is typically hepatocellular in pattern, with marked elevations of alanine aminotransferase (ALT) and aspartate aminotransferase (AST), and may present with jaundice, fatigue, nausea, and abdominal discomfort. Cases have been reported after both short-term and prolonged use, and after use of both the raw and the prepared forms, although the prepared form is the one most commonly used in tonic preparations. The China National Medical Products Administration has issued advisories requiring liver function monitoring and warning labels for He Shou Wu-containing products. Because of these concerns, He Shou Wu should be used only under the guidance of a qualified healthcare professional, with baseline and periodic monitoring of liver function (ALT, AST, alkaline phosphatase, bilirubin), and it should be promptly discontinued if liver enzyme abnormalities or symptoms of liver injury develop.

Avoidance in pre-existing liver disease: He Shou Wu should be avoided in individuals with pre-existing liver disease (including chronic viral hepatitis, alcoholic liver disease, non-alcoholic fatty liver disease, autoimmune liver disease, and cirrhosis), in those with persistently elevated liver enzymes, and in those with a personal history of drug-induced liver injury. The mechanism of He Shou Wu-associated liver injury appears to involve both intrinsic toxicity (related to anthraquinone constituents including emodin) and idiosyncratic immune-mediated reactions, and individuals with pre-existing hepatic vulnerability are at higher risk. Anyone who develops symptoms of liver injury (yellowing of the skin or eyes, dark urine, right upper abdominal pain, persistent fatigue, nausea) while taking He Shou Wu should discontinue use immediately and seek medical evaluation.

Distinction between raw (Sheng) and prepared (Zhi) forms: The traditional preparation of He Shou Wu by steaming with black soybean decoction is believed to reduce the free anthraquinone content (including free emodin), which is one rationale for the use of the prepared form in tonic applications. However, the preparation does not eliminate the hepatotoxicity risk, and cases of liver injury have been reported with both the raw and the prepared forms. The raw form (Sheng He Shou Wu) additionally has a stronger traditional laxative action and should be used with particular caution. Self-prepared or improperly processed material may have a higher free anthraquinone content and a correspondingly higher risk.

Pregnancy and lactation: He Shou Wu should be used during pregnancy and lactation only under the direct supervision of a qualified healthcare professional. The traditional tonic applications of the prepared form have been used in pregnancy in TCM practice, but rigorous safety data are lacking, and the hepatotoxicity concerns are particularly relevant during pregnancy, when liver function may be affected by other physiological changes. The raw form, with its stronger laxative action, should be avoided during pregnancy. Self-administration of He Shou Wu products during pregnancy or lactation is not recommended.

Interactions with hepatotoxic medications and alcohol: Because of the documented risk of hepatotoxicity, He Shou Wu should be used with particular caution in combination with other potentially hepatotoxic medications (including certain statins, methotrexate, isoniazid, valproate, and high-dose acetaminophen) and with alcohol. Concurrent use of multiple potentially hepatotoxic agents increases the risk and may obscure the attribution of any liver injury that develops. Pre-clinical data also suggest that constituents including THSG and the anthraquinones may affect the activity of hepatic cytochrome P450 enzymes (notably CYP3A4, CYP2C9, and CYP1A2), which could theoretically alter the metabolism of drugs processed through these pathways. The anthraquinone content may also potentiate the effects of stimulant laxatives and may affect electrolyte balance when combined with diuretics. Consult a qualified healthcare professional before combining He Shou Wu with any prescription medications.

Spleen-Stomach deficiency with dampness and diarrhea: In traditional TCM theory, prepared He Shou Wu is slightly warm and moistening in nature, and it may aggravate patterns of Spleen-Stomach deficiency with dampness, particularly when accompanied by diarrhea, abdominal distension, and a greasy tongue coating. Individuals with such patterns should use the prepared form with caution and only in combination with damp-draining and Spleen-strengthening herbs. The raw form, with its stronger laxative action, should be avoided entirely in individuals with chronic diarrhea or Spleen deficiency.

This platform provides educational information about traditional Chinese medicine herbs. It does not recommend, endorse, or prescribe the use of He Shou Wu or any other herbal product for the treatment of any medical condition. Because of the documented hepatotoxicity risk, all decisions regarding the use of He Shou Wu should be made in consultation with a qualified healthcare provider, with baseline and periodic liver function monitoring.