Fo-Ti (He Shou Wu) for Kidney Health

Research suggests that Fo-Ti (He Shou Wu) and its isolated bioactive compounds, particularly 2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside (TSG/THSG) and rhein, demonstrate nephroprotective properties across a range of preclinical animal studies, with findings pointing to mechanisms such as blocking the renin-angiotensin system, reducing renal fibrosis, activating the Nrf2-Keap1 antioxidant pathway, modulating the SIRT1/TGF-β1 pathway, and promoting erythropoietin expression in kidney tissue. The body of evidence consists primarily of animal studies and narrative or systematic reviews, with no human clinical trials identified, which substantially limits the ability to draw conclusions about effectiveness or safety in people. Findings are meaningfully mixed, as several reviews note that certain constituents — including emodin and rhein — exhibit dose-dependent kidney toxicity in addition to any protective effects, and broader safety concerns about hepatotoxicity associated with Fo-Ti products have been raised across multiple countries, suggesting the herb carries real risks alongside its studied benefits. Readers interested in Fo-Ti for kidney health should be aware that the current evidence base is largely preclinical and that the risk-benefit picture remains incompletely understood.