Rhino Horn
Xī Jiǎo 犀角 (rhinoceros horn)
Keratin — like fingernails — with no medicinal value.
Evidence tier
No Evidence
Research weight
Not supported
Citations
17 verified / 17
Classification
Banned & Harmful
⊘
What the evidence says. No credible human evidence supports the marketed claims — widely considered ineffective.
⚠
Health warning. Rhino horn has no proven medicinal value, may contain toxic heavy metals, and all trade is illegal under CITES. Demand drives rhino poaching toward extinction.
What is Rhino Horn?
Rhino Horn (Xī Jiǎo 犀角 (rhinoceros horn)) is a banned or harmful substance marketed for fever, 'detox', and — in modern myth — aphrodisiac / cancer claims. NutriDex grades the human evidence as No Evidence. Rhino horn is essentially keratin, the same protein as hair and fingernails. A pharmacological study decades ago found no medicinal value, and recent analyses even detected toxic elements such as arsenic and lead in samples. Despite this, persistent demand — fueled by modern myths it never traditionally held, like cancer cures and aphrodisiac claims — drives relentless poaching. Trade is banned worldwide under CITES.
Marketed Claims (unproven)
✕(Claimed) fever, 'detox', and — in modern myth — aphrodisiac / cancer claims
Dosing & Compounds
Use & Legality
No legitimate use — illegal and without medicinal value.
Active Compounds
Safety & Cautions
⚠ No benefit, possible heavy-metal toxicity, and illegal. Purchasing it is a wildlife crime that directly funds the extinction of rhinos. Educational only — always check with your doctor or pharmacist before combining Rhino Horn with any medicine.
Evidence & Risk Findings ★ 17 studies
systematic review
Chimes et al. 2025 (Biological Conservation)
✓ Full text
Systematic review of global rhino dehorning practice found it is widely used to reduce horn value and poaching incentive, but evidence on long-term effectiveness and welfare/ecological side-effects remains limited and uneven.
conservation status report / agency statement
IUCN SSC African Rhino Specialist Group 2025 (IUCN press release)
✓ Source
African rhino poaching fell to 516 incidents in 2024 (2.15% of the population, lowest rate since 2011), but white rhino numbers dropped 11.2% since 2023 amid drought and continued horn-trade pressure.
Guideline
Composition / Hoffmann–La Roche
✓ Source
Horn is keratin; pharmacological testing found no medicinal value.
Agency / regulator
CITES / conservation
✓ Source
Trade banned; demand drives poaching and pushes rhinos toward extinction.
Safety / toxicology
2024 analysis
✓ Full text
Detected potentially toxic elements (e.g. arsenic, lead) in horn samples.
observational study (quasi-experimental, multi-reserve)
Kuiper et al. 2025 (Science)
✓ PubMed
Dehorning 2,284 rhinos across 8 of 11 Greater Kruger reserves (2017-2023) cut poaching by about 78% using only ~1.2% of the anti-poaching budget, far outperforming arrests/law enforcement.
Observational
Roth 2024
✓ PubMed
Analysis of rhinoceros horn found essential trace minerals present only at concentrations too low to confer human health benefit, while exterior/soil-contaminated samples carried potentially toxic metals (e.g. arsenic) that could exceed regulatory limits for food and pharmaceuticals.
Observational
Roth 2024 (Sci Rep full text)
✓ Source
Full-text Scientific Reports study showing horn mineral/metal content varies by location, depth and color; low beneficial-mineral concentrations make medicinal benefit unlikely while soil-derived toxic metals pose a contamination risk on ingestion.
Observational
Roth 2024 (PMC)
✓ Full text
Open-access version reporting that horn-derived minerals occur at concentrations too low for therapeutic effect and that potentially toxic elements accumulate in the horn exterior, undermining claims of medicinal value.
Observational
Yang 2011
✓ PubMed
Two-dimensional electrophoresis of rhinoceros, water buffalo and yak horns identified shared keratin protein components, supporting that cheaper non-endangered horns are proteomically and pharmacologically equivalent substitutes for rhino horn.
Observational
But 1991 (Ethnopharmacology II)
✓ PubMed
Antipyretic activity of rhino-horn-containing prescriptions in rats appeared only at supra-clinical doses and was matched by common animal-horn substitutes, indicating no fever benefit at human-equivalent doses and no effect unique to rhino horn.
Mechanism
Liu et al. 2023 (J Sep Sci, label-free proteomics)
✓ PubMed
Label-free proteomics identified keratin-derived peptide biomarkers distinguishing rhino/saiga horn from water buffalo, yak, goat and cattle horns; framed rhino horn as a keratin-based material for which non-endangered horns serve as clinical alternatives, reinforcing that the constituent (keratin) is not species-specifically therapeutic.
qualitative consumer study
Nguyen & Roth 2021 (Journal of Consumer Affairs)
✓ Source
Qualitative study of Vietnamese consumers found rhino horn is used as a perceived panacea for serious illnesses including cancer despite no scientific evidence of efficacy, with demand driven by hope, status and social pressure.
cross-sectional behavioural survey
Truong et al. 2022 (Ecological Economics)
✓ Full text
Survey of self-reported rhino-horn consumers in Hanoi using the Theory of Planned/Interpersonal Behaviour identified social-psychological norms and perceived medicinal benefit as the strongest drivers of intention to buy, informing demand-reduction strategy.
proteomic/bioassay study
Liu et al. 2016 (Scientific Reports)
✓ Full text
Proteomic analysis and bioeffect testing of seven horn types concluded that abundant water buffalo and yak horn show antipyretic, sedative and procoagulant activity similar to rhinoceros horn, supporting sustainable substitutes and undermining any species-specific medicinal value of rhino horn.
experimental study
Laburn & Mitchell 1997 (J Basic Clin Physiol Pharmacol)
✓ PubMed
Controlled experiment in rabbits found rhinoceros horn extract produced no antipyretic effect against LPS-induced fever at either a human-equivalent dose (50 mg/kg) or 10x that dose (500 mg/kg), while indomethacin reduced fever, directly contradicting the traditional fever-reducing claim.
experimental study
But, Lung & Tam 1990 (J Ethnopharmacology)
✓ PubMed
Ethnopharmacology study in rats found aqueous rhinoceros horn extract reduced turpentine-induced fever only at very high concentrations (1-5 g/ml) far above clinical dosing, and that saiga antelope, water buffalo and cattle horns produced comparable antipyretic effects, indicating no unique medicinal property of rhino horn.