He Shou Wu

He Shou Wu is the common Chinese name for the root of Reynoutria multiflora, a perennial climbing vine of the family Polygonaceae that has also been classified as Polygonum multiflorum and Fallopia multiflora ^[1]. Native to central and southern China and neighboring regions, it is known in North America as fo-ti and by the English name tuber fleeceflower ^[2]. The plant grows from a thick woody tuber, and it is this root that is prepared for medicinal use.

The herb is listed in the Chinese Pharmacopoeia and ranks among the most popular tonics in traditional Chinese medicine ^[2]. It is traditionally credited with blackening the hair, tonifying the liver and kidneys, and promoting longevity and vitality ^[1]. An important distinction in its preparation is drawn between the raw root and the processed root, which is typically stewed with black soybean liquid; the two forms are regarded as having different properties and uses in traditional practice ^[1].

More than a hundred compounds have been identified in the plant, with the principal classes being stilbenes, quinones, and flavonoids ^[1]. The best-studied stilbene is 2,3,5,4'-tetrahydroxystilbene-2-O-glucoside, while the quinone fraction includes anthraquinones such as emodin and rhein ^[1]. These same anthraquinones, along with the way the root is processed, are closely tied to the herb's toxicity profile ^[1].

Laboratory and clinical investigations have explored a range of possible effects, including antioxidant, anti-aging, lipid-lowering, anti-inflammatory, and neuroprotective activities, and the herb has been examined in the context of conditions such as high cholesterol, hair loss, and neurodegenerative disease ^[1][2]. Much of this evidence remains preliminary, and reviews emphasize that rigorous clinical confirmation is still limited ^[2].

A major concern surrounding He Shou Wu is its potential to cause liver injury. Case series have documented acute hepatitis following ingestion of the herb in various forms, ranging in severity from mild, reversible illness to, in rare instances, liver failure requiring transplantation or resulting in death ^[3]. Research indicates that this hepatotoxicity is often idiosyncratic and may involve an immune-mediated mechanism rather than a simple dose-dependent poisoning, meaning susceptibility can vary widely between individuals ^[4]. The processing method and the specific constituents present, particularly the anthraquinones, are thought to influence the risk ^[1][4].

He Shou Wu is sold internationally as a dietary supplement and traditional herbal product, and is encountered as dried root slices, powders, teas, tinctures, and capsules, as well as an ingredient in hair-care preparations ^[2]. Because of the documented liver-injury reports, some regulatory agencies and safety reviews have issued warnings about its use, and monitoring of liver health is often advised for those who take it ^[3][4].

The big one is idiosyncratic liver injury; there are documented cases of hepatitis linked to He Shou Wu, sometimes serious. Raw (unprocessed) root is harsher and more likely to cause GI upset and liver stress than the prepared form. Don't use it with other hepatotoxic supplements or alcohol, and stop immediately if you notice dark urine, yellowing, or right-side abdominal pain.