He Shou Wu (Fo-Ti) for Liver Health

Research suggests that He Shou Wu (Polygonum multiflorum) presents a deeply mixed picture for liver health, with the same plant producing both potentially protective and demonstrably harmful effects depending on form, dose, processing, and individual susceptibility. Studies indicate that certain isolated compounds — particularly TSG and a group of mitochondria-targeting constituents — may reduce fat accumulation in the liver, improve markers of metabolic dysfunction, and activate protective cellular pathways, with findings supported by animal studies and cell-culture experiments examining conditions like fatty liver disease and prediabetes. However, a substantial and consistent body of evidence, including reviews, mechanistic studies, and a formal clinical guideline from a Chinese medicine association, documents that the herb — especially in its raw, unprocessed form — can cause meaningful liver injury through multiple identified pathways, including mitochondrial disruption, inhibition of bilirubin-processing enzymes, triggering of iron-dependent cell death (ferroptosis), and the action of compounds computationally flagged as likely hepatotoxicants. The available research consists almost entirely of animal studies, cell-based experiments, computational models, and narrative reviews rather than human clinical trials, which significantly limits the conclusions that can be drawn, and researchers across multiple studies acknowledge that the specific toxic compounds and the populations most vulnerable to harm remain incompletely understood.