Research suggests that Rehmannia glutinosa and its bioactive constituents — particularly catalpol, rehmapicrogenin, and various polysaccharides — demonstrate anti-inflammatory properties across a range of laboratory and animal models, with proposed mechanisms including suppression of the NF-κB signaling pathway, inhibition of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6, and modulation of oxidative stress pathways. The available evidence consists predominantly of preclinical studies (cell culture and animal experiments) along with several narrative reviews summarizing findings on catalpol and Rehmannia polysaccharides, and one very small, uncontrolled clinical trial involving a multi-herb formula that included Rehmannia as one of eleven ingredients, making it impossible to attribute the observed effects specifically to Rehmannia alone. One study from 2008 conducted in diabetic rats found that a Rehmannia extract meaningfully reduced the inflammatory marker C-reactive protein, and a 2012 bioassay-guided study identified rehmapicrogenin as a specific anti-inflammatory compound, though researchers noted that other unidentified constituents likely contribute to the overall effect. Overall, the body of research is directionally consistent in supporting anti-inflammatory activity, but the near-total absence of well-designed human clinical trials means that whether these effects translate meaningfully to people remains an open question.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Anti-inflammatory activity of the Tongmai Yangxin pill in the treatment of co... | RCT | 2021 | Supports | 100 |
| Catalpol ameliorates liver fibrosis via inhibiting aerobic glycolysis by EphA... | Other | 2024 | Supports | 95 |
| Anti-inflammatory effects of Rehmannia glutinosa polysaccharide on LPS-induce... | Other | 2025 | Supports | 90 |
| Structural characterization and anti-inflammatory effects of an arabinan isol... | Other | 2023 | Supports | 85 |
| Structural changes, and anti-inflammatory, anti-cancer potential of polysacch... | Other | 2022 | Supports | 80 |
| Anti-inflammatory, expectorant, and antitussive properties of Kyeongok-go in ... | Other | 2021 | Supports | 75 |
| Rehmannia glutinosa Polysaccharides: Optimization of the Decolorization Proce... | Other | 2023 | Supports | 70 |
| Bioassay-guided isolation of anti-inflammatory components from the root of Re... | Other | 2012 | Supports | 65 |
| Protective effects of catalpol on cardio-cerebrovascular diseases: A comprehe... | Review | 2023 | Supports | 60 |
| Molecular and Biochemical Pathways of Catalpol in Alleviating Diabetes Mellit... | Review | 2021 | Supports | 55 |
| Effects of Catalpol on Alzheimer's Disease and Its Mechanisms. | Review | 2022 | Supports | 50 |
| Catalpol attenuates osteoporosis in ovariectomized rats through promoting ost... | Other | 2024 | Neutral | 45 |
| Structural characteristics, biological activities and market applications of ... | Review | 2024 | Supports | 40 |
| Characterization of the anti-diabetic and antioxidant effects of rehmannia gl... | Other | 2008 | Supports | 35 |
| Influence of traditional Chinese anti-inflammatory medicinal plants on leukoc... | Other | 2003 | — | 30 |