⚠ Evidence warning: Clinical trials or other evidence do not support the claim that repeating liver function tests at 4 weeks, 12 weeks, then every 3 months is a tested monitoring schedule. This page keeps it as a report of what people, websites or other media say.

He Shou Wu — Benefits Deep Dive

Benefits — scientific infographic poster

He Shou Wu (Polygonum multiflorum, recently reclassified as Fallopia multiflora and Reynoutria multiflora) is the "Mr He's black hair" herb of Traditional Chinese Medicine — named after the apocryphal Tang Dynasty story of a barren, white-haired elderly man whose hair returned to black and whose fertility returned after he discovered the root in the mountains. It is a traditional Chinese tonic herb, used for premature graying, hair loss, kidney essence (jing) deficiency, and longevity. The modern active-compound profile is dominated by 2,3,5,4'-tetrahydroxystilbene-2-O-glucoside (TSG, also written THSG) — a stilbene glycoside structurally related to resveratrol — together with anthraquinones (emodin, physcion, chrysophanol), tannins, and lecithin. The four deep-dive pages below cover the effects most often described (hair restoration, cognitive support, cardiovascular and longevity mechanisms) and the single most important safety concern in modern integrative medicine: idiosyncratic drug-induced liver injury (DILI), now well-documented in published case series and associated with the human leukocyte antigen-B*35:01 allele. The raw (sheng shou wu) vs. processed (zhi shou wu) distinction is essential to understanding both the traditional use and the modern safety signal.

CRITICAL SAFETY WARNING — LIVER INJURY

He Shou Wu is one of the most-reported single herbs in the global drug-induced liver injury (DILI) literature. Lei et al. (2015) reviewed 450 published cases of liver damage from Polygonum multiflorum in 76 articles — from raw and processed root pieces and many Chinese patent medicines that contain it. Two people needed a liver transplant and seven died; the other 441 recovered or improved after stopping He Shou Wu and receiving supportive care. the World Health Organization, the UK MHRA, Australian TGA, and Health Canada have all issued advisory warnings. The hepatotoxicity is idiosyncratic — it is not dose-dependent in the conventional sense, can occur at traditional doses, and appears to be mediated by an immune-allergic mechanism strongly associated with the human leukocyte antigen-B*35:01 allele (Li et al. 2019). Lei 2015 also concluded that most cases were “much related to long-term and overdose” use.

What the case reports and studies show:

See the Liver Health and Hepatotoxicity Warning deep-dive for the full clinical picture, the human leukocyte antigen-B*35:01 mechanism, and the processed-vs-raw safety distinction in detail.

Deep-Dive Articles

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Hair and Anti-Aging

The Mr He legend — the Tang Dynasty story of Mr He's black hair restoration that named the herb. Han et al. (2015) studied Polygonum multiflorum and hair graying in mice; no patients were studied. TSG (2,3,5,4'-tetrahydroxystilbene-2-O-glucoside) and the mechanism for hair-follicle melanogenesis. The dermal papilla cell, hair follicle stem cell, and the Wnt/β-catenin pathway. Premature graying mechanisms and the proposed restoration of tyrosinase activity in graying follicles. Traditional dosing for hair: 9 to 15 g of processed root daily in decoction, typically combined with shu di huang (Rehmannia) and nu zhen zi (Ligustrum). Why raw root is contraindicated and why most modern hair-targeted formulas use the processed form.

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Liver Health and Hepatotoxicity Warning

The single most important safety topic in the He Shou Wu literature. Lei et al. (2015) systematic review of 450 published DILI cases in 76 articles. The human leukocyte antigen-B*35:01 immune-allergic mechanism (Li et al. 2019, Hepatology). The processed (zhi shou wu, prepared with black bean broth at 100°C for hours) vs. raw (sheng shou wu) safety distinction — raw root has substantially higher anthraquinone load and a substantially higher reported hepatotoxicity rate. International regulatory actions: WHO, UK MHRA, Australian TGA, Health Canada. Who is most at risk, liver function tests (LFTs), and the early signs of liver injury before progression to acute liver failure — mostly the hepatocellular (liver-cell) type, found in 96.6% of cases in a 2025 hospital study, rather than the cholestatic (bile-flow) type.

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Cognitive Function

TSG anti-Alzheimer preclinical data — reduction of amyloid-β toxicity, tau hyperphosphorylation, and synaptic loss in transgenic mouse models. Hippocampal neurogenesis evidence: TSG upregulates brain-derived neurotrophic factor (BDNF) and stimulates dentate gyrus precursor proliferation. Neuroinflammation reduction via microglia M1-to-M2 phenotype shift and NF-κB suppression. No human trial in mild cognitive impairment is cited; the evidence comes from animal and cell studies (preclinical). The translational caveat — the data are preclinical, and human dosing requires balancing cognitive benefit against the hepatotoxicity risk that the deep-dive Liver-Health article details.

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Longevity and Cardiovascular

The emodin and stilbene class as the long-life rationale. TSG is structurally a resveratrol relative (both are stilbenes) and activates SIRT1 in cell-culture models — the same sirtuin pathway implicated in caloric restriction longevity and the resveratrol literature. Lipid-lowering data: reduction of total cholesterol, low-density lipoprotein (LDL), and triglycerides in animal hyperlipidemia models and small human studies. Antioxidant capacity (superoxide dismutase, glutathione peroxidase upregulation). Why the traditional Chinese tonic longevity claims are mechanistically plausible but evidentially modest compared to the strong preclinical cardiovascular data on lipid metabolism and oxidative stress.

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Table of Contents

  1. Deep-Dive Articles
  2. Why He Shou Wu Produces Effects
  3. Key Research Papers
  4. External Authoritative Resources
  5. Connections
  6. Featured Videos

Why He Shou Wu Produces Effects

He Shou Wu is mechanistically interesting because, unlike single-target pharmaceuticals, its effects derive from a small constellation of active compounds with overlapping and sometimes opposing biology. Understanding that compound mix is the key to understanding why the same root can both restore hair and damage the liver, both improve memory and (in rare individuals) trigger an immune-mediated hepatitis.

  1. 2,3,5,4'-tetrahydroxystilbene-2-O-glucoside (TSG, also THSG) — the principal stilbene glycoside, structurally related to resveratrol. TSG is the active compound most consistently linked to the beneficial effects: antioxidant, anti-inflammatory (NF-κB suppression), SIRT1 activation, neuroprotective in amyloid-β and Parkinson's models, and the hair-restoration effect via dermal papilla cell signaling. Standardized extracts typically quantify TSG content (1 to 5% in raw root, somewhat higher concentrations in processed root after some hydrolysis).
  2. Emodin and related anthraquinones (physcion, chrysophanol, aloe-emodin, rhein) — the same anthraquinone class found in Rhubarb, senna, and cascara. Emodin has demonstrated anti-cancer, anti-inflammatory, and lipid-lowering activity in cell culture and animal studies, but it is also the principal class implicated in the hepatotoxicity. The processed form (zhi shou wu, prepared with black bean broth at high temperature for many hours) reduces but does not eliminate the anthraquinone load — this is the central pharmacologic reason traditional medicine insists on the processed preparation for internal use.
  3. Tannins (catechin, epicatechin gallate, and condensed proanthocyanidins) — account for the astringent traditional indication for diarrhea and the antioxidant capacity beyond what TSG alone would predict.
  4. Lecithin and phospholipids — contribute to the traditional jing-tonifying ("essence-supplementing") characterization and may have a small role in hepatoprotection that runs counter to the anthraquinone hepatotoxicity. The net effect on the liver is the product of these opposing influences plus individual immune-genetic susceptibility.
  5. Idiosyncratic immune mechanism — human leukocyte antigen-B*35:01 — Li et al. (2019) found the human leukocyte antigen-B*35:01 allele in 45.4% of 11 people with Polygonum multiflorum-induced liver injury, compared with 2.7% of the Han Chinese population (odds ratio 30.4). In a second group of patients and a combined analysis, carriers had about 144 times the odds of this liver injury compared with population controls (odds ratio 143.9). In a follow-up of 72 outpatients taking the herb for 4 weeks, 6 developed silent rises in liver enzymes (transaminases) — 37.5% of gene carriers against 4.7% of non-carriers. The mechanism appears to be immune-mediated: a 2024 mouse study (Zeng et al.) found that emodin binds the human leukocyte antigen-B*35:01 molecule and activates CD8+ T cells (a type of white blood cell) that damage the liver in mice carrying the human gene, but not in ordinary mice. This helps explain why the injury strikes only some people and why conventional toxicology screening gives little warning, although Lei 2015 also linked most cases to long-term use and overdose.

A 2025 hospital study from China (Tan et al.) compared 73 people with He Shou Wu liver injury with 168 people injured by other Chinese herbal medicines and 225 injured by modern drugs. Only 11 (15.1%) had taken He Shou Wu as a single herb; 37 (50.7%) had taken it in Chinese patent medicines and 25 (34.2%) in mixed herbal formulas. The He Shou Wu group was younger (48 years against 55 and 52), had higher liver enzyme levels, and more often had the most severe grade of liver damage than people injured by modern drugs. The liver-cell (hepatocellular) pattern made up 96.6% of the He Shou Wu cases, against 69.3% with modern drugs. Single-herb and mixed products caused similar injury, and raw root caused more severe injury than processed root (median alanine aminotransferase 1,289 against 890 U/L), but processed root still caused liver injury.

The clinical implication is that He Shou Wu's effects are not extractable through a single isolated compound. TSG monotherapy in trials has not fully reproduced the traditional benefits, and isolated emodin has the dose-related toxicity without the balancing influences. The traditional processed-root preparation remains the form most consistent with the published efficacy and safety data — but even that form carries the idiosyncratic immune-genetic hepatotoxicity risk, which is unavoidable in genetically susceptible individuals regardless of preparation.

For the related topics that intersect with He Shou Wu's biology, see our pages on Astragalus (the most commonly co-prescribed TCM tonic), Ginseng (the alternative qi-tonifying herb), Schisandra (a hepatoprotective adaptogen often used alongside He Shou Wu in modern integrative protocols), and Longevity Protocols (the broader rasayana / anti-aging context).

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Key Research Papers

  1. Han MN, Lu JM, Zhang GY, Yu J, Zhao RH (2015). Mechanistic Studies on the Use of Polygonum multiflorum for the Treatment of Hair Graying. BioMed Research International, 2015:651048. — PubMed PMID: 26640791
  2. Lei X et al. (2015). Liver Damage Associated with Polygonum multiflorum Thunb.: A Systematic Review of Case Reports and Case Series. Evidence-Based Complementary and Alternative Medicine. — PubMed PMID: 25648693
  3. Li C, Rao T, Chen X, et al. (2019). HLA-B*35:01 Allele Is a Potential Biomarker for Predicting Polygonum multiflorum-Induced Liver Injury in Humans. Hepatology, 70(1):346-357. — PubMed PMID: 30985007
  4. Zeng X, Li C, Liu Y, et al. (2024). HLA-B*35:01-mediated activation of emodin-specific T cells contributes to Polygonum multiflorum thunb. -induced liver injury in mice. Journal of Ethnopharmacology, 334:118523. — PubMed PMID: 38969149
  5. Tan KA, Yang WN, Qiu YW, et al. (2025). [Comparison of clinical characteristics between patients with Polygonum multiflorum-induced liver injury and those with other drug-induced liver injuries]. Zhonghua Gan Zang Bing Za Zhi, 33(5):463-469. — PubMed PMID: 40528591
  6. Lin L et al. (2015). Traditional usages, botany, phytochemistry, pharmacology and toxicology of Polygonum multiflorum Thunb.: A review. Journal of Ethnopharmacology. — PubMed PMID: 25449462

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External Authoritative Resources

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Connections

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