Gout

In potassium-oxonate hyperuricaemic rats, 12 weeks of the active fraction of Polyrhachis vicina lowered serum uric acid, inhibited hepatic and serum xanthine oxidase, and down-regulated the renal urate transporters URAT1/GLUT9 while up-regulating OAT1 — a urate-lowering, kidney-protective profile ^{1Reference 1Su et al. · 2018AnimalHypouricemic and nephroprotective effects of an active fraction from Polyrhachis vicina Roger on potassium-oxonate-induced hyperuricemia in rats — animal in vivoView study →}. The result comes from one rat model, the effective dose was a concentrated solvent fraction rather than the whole-ant tonic, and there is no human data.

P. niruri lowers uric acid mainly by increasing excretion: in hyperuricaemic rats the methanol extract raised urinary uric-acid excretion ~1.7-fold and inhibited xanthine oxidase, with the lignans phyllanthin/hypophyllanthin acting as uricosurics via urate-transporter blockade ^{4Reference 4Murugaiyah et al. · 2009In vitroMechanisms of antihyperuricemic effect of Phyllanthus niruri and its lignan constituents — animal model and in vitroView study →}. In humans, urinary uric acid fell as a secondary finding in hyperuricosuric stone-formers ^{5Reference 5Pucci et al. · 2018ObservationalEffect of Phyllanthus niruri on metabolic parameters of patients with kidney stone — prospective cohortView study →}; there is no dedicated human gout trial.

A 2026 study paired serum amino-acid metabolomics from hyperuricaemia patients with a rat model, showing P. cuspidatum corrected the metabolic and inflammatory disturbances underlying hyperuricaemia-induced renal injury ^{7Reference 7Ma et al. · 2026AnimalPolygonum cuspidatum alleviates hyperuricaemia-induced renal injury via rectifying amino-acid metabolism — human serum metabolomics with rat validationView study →}. The human component is observational metabolomics, not an efficacy trial. One registered Phase 2 trial exists — NCT04462666, Huzhang granules vs etoricoxib in acute gouty arthritis (267 planned) — but has held “unknown” status since 2020 with no results.

A single focused study identified meadowsweet as a xanthine-oxidase inhibitor — allopurinol’s target — and on fractionation spiraeoside was ~25× more potent than allopurinol in the assay, consistent with the herb’s traditional gout use ^{8Reference 8Gainche · 2021In vitroXanthine Oxidase Inhibitors from Filipendula ulmaria and Their Efficient Detection by HPTLC and HPLC — in vitroView study →}. The work is entirely in vitro. Enzyme potency in an assay does not equal a clinical urate-lowering effect, and there is no animal or human uricaemia data.

A 2026 study found an aqueous Tagetes lucida extract (562 mg/kg) produced sustained relief comparable to ketorolac in a rat arthritic gout-pain model, with the coumarin umbelliferone active in its own right and no toxicity signs at 2000 mg/kg ^{9Reference 9Ángeles-López et al. · 2026AnimalAntinociceptive effect of Tagetes lucida in an arthritic gout-pain model in rats — animal studyView study →}. The effect is analgesia in a gout-pain model, not urate lowering, and comes from a single animal study.

Mugwort’s flavonoids — luteolin, apigenin and quercetin — are xanthine-oxidase inhibitors, and an Artemisia vulgaris extract showed antioxidant, anti-inflammatory and XO-inhibitory activity in a mouse study ^{10Reference 10Trinh PTN et al. · 2024AnimalAntioxidant, anti-inflammatory and xanthine-oxidase inhibitory activity of Artemisia vulgaris extract and fractions — mouse, in vivoView study →}. There is no serum-urate or gout-outcome data, and mugwort is not traditionally a gout remedy.

In animal gout models, Pycnogenol (pine bark extract) attenuated urate-crystal-induced COX-2, IL-8, iNOS and nitrosative stress in joint tissue ^{11Reference 11Peng YJ et al. · 2012AnimalPycnogenol attenuates the inflammatory and nitrosative stress on joint inflammation induced by urate crystals — animal modelView study →}. Pycnogenol targets the crystal-driven inflammatory flare, not serum urate. The work is animal-only, with no human gout trial.

Urate lowering is the most-reproduced pharmacology in the genus. Across potassium-oxonate/monosodium-urate rodent models, S. china and S. glabra extracts lower serum uric acid and reduce paw edema and renal injury via xanthine-oxidase inhibition and renal urate-transporter modulation, with the four astilbin stereoisomers as the active fraction ^{13,14,15Reference 13Chen L et al. · 2011AnimalAnti-hyperuricemic and nephroprotective effects of Smilax china L. — animal modelView study →Reference 14Liang G et al. · 2019AnimalProtective effects of Rhizoma smilacis glabrae extracts on potassium oxonate- and monosodium urate-induced hyperuricemia and gout in mice — animal modelView study →Reference 15Huang L et al. · 2019AnimalThe anti-hyperuricemic effect of four astilbin stereoisomers in Smilax glabra on hyperuricemic mice — animal modelView study →}; S. riparia saponin pallidifloside D augments allopurinol ^{16,17Reference 16Wu XH et al. · 2015AnimalAnti-hyperuricemia effects of allopurinol are improved by Smilax riparia — animal modelView study →Reference 17Hou PY et al. · 2015AnimalPallidifloside D from Smilax riparia enhanced allopurinol effects in hyperuricemia mice — animal modelView study →}.

Every single-herb result comes from rodents. The only human uric-acid data are from Rebixiao granules, a multi-herb formula where Smilax is one ingredient ^{18Reference 18Ji W et al. · 2005Clinical trialEffects of Rebixiao granules on blood uric acid in patients with repeatedly attacking acute gouty arthritis — clinical (multi-herb formula)View study →}.

Burdock root is a classic Western alterative/“blood-cleansing” remedy for gout and rheumatism, and a trial of burdock root extract in asymptomatic hyperuricaemia/gout is registered — but no results are published. The traditional depurative and diuretic rationale has no controlled human backing yet.

Cannabis appears in traditional listings for “arthritis and gout,” resting on its general analgesic/anti-inflammatory profile rather than any urate effect — across many RCTs it is a modest analgesic for chronic pain ^{2,3Reference 2Whiting et al. · 2015Meta-analysisCannabinoids for Medical Use: A Systematic Review and Meta-analysisView study →Reference 3Ateş G et al. · 2026Systematic reviewCannabis-based medicines for chronic neuropathic pain in adults — Cochrane systematic reviewView study →}. There is no cannabis study on serum urate, hyperuricaemia or gout flares specifically. Its use is symptomatic pain relief, not a disease-modifying one.

Cha de bugre has a traditional South American use for “elevated uric acid” alongside its diuretic/water-retention and kidney-support reputation. No study has measured its effect on uric acid.

Long-documented Western-herbal use for gout and rheumatic complaints; couchgrass remains a popular traditional gout remedy ^{6Reference 6Zhakipbekov et al. · 2026Systematic reviewElymus repens (L.) Gould phytochemistry, pharmacological activities and therapeutic potential — systematic reviewView study →}. The rationale is inferred from mechanism: osmotic diuresis from the sugar alcohols mannitol/inositol is presumed to raise urine flow and uric-acid clearance. No study has measured serum urate, uric-acid excretion, or gout outcomes with couchgrass in animals or humans.

Reishi was used historically in topical foot baths for gout ^{12Reference 12Rogers · 2011The fungal pharmacy: The complete guide to medicinal mushrooms and lichens of North America [Adobe Digital Editions version]}, not as an oral or systemic urate remedy.