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Hgw4.2
Horny Goat Weed Research
Mostly mechanism / observational
22 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most Horny Goat Weed studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 2007–2026 with a typical study size of 100 participants.
Based on 22 studies · 1 meta-analysis · 2 RCTs · 1,126 total participants
Confidence
Moderate confidence
By outcome
Bone healthReduced bone loss in postmenopausal women in a 24-month RCT (icariin/flavonoids) · 6-24 months
Mostly mechanism / observational15 studies
Men's vitalityPopularly used for libido/erectile function, but rigorous human evidence is weak · Variable
Mostly mechanism / observational3 studies
Active research area
18 studies in the last 5 years · Latest meta-analysis: 2025
200720162026
1Review2026
In plain English: This review aims to critically and systematically synthesize current evidence on ICA-mediated bone repair and regeneration, with a particular emphasis on the molecular regulation of osteogenic signaling, the restoration of bone-remodeling homeostasis, and delivery-system-enabled strategies that may facilitate translational application.
Li C et al. · Cells (2026)
To address this, innovative delivery systems have been engineered to enhance localized bioavailability and sustain therapeutic efficacy, such as hydrogel depots, nanoparticle formulations, and 3D-printed scaffolds enabling precise, controlled release.
Overall, these mechanistic elucidations and delivery advancements underscore ICA's potential as a translational candidate for osteoporosis treatment and bone regenerative therapies.
In plain English: Future investigations must prioritize phase III fibrosis trials, pharmacokinetic optimization in cirrhotic populations, and comprehensive drug-drug interaction studies with direct-acting antivirals to establish evidence-based clinical protocols.
Zhang J et al. · Frontiers in cellular and infection microbiology (2026)
Critical evidence gaps-including the absence of validation in viral hepatitis models, undefined pharmacokinetics in cirrhosis, and lack of drug-drug interaction data with antivirals-currently preclude routine clinical application in hepatitis and cirrhosis.
Safety analyses reveal dose-dependent hepatotoxicity at concentrations exceeding 50 μM icaritin and substantial inter-individual variability in gut microbiota-mediated bioactivation.
Epimedium flavonoids exhibit multi-target therapeutic potential that bridges traditional botanical medicine and modern pharmacology, though critical translational gaps persist.
In plain English: Such intrinsic knowledge will significantly further studies on the Epimedium and its bioactive compounds that protect the male reproductive system and provide some guidances for clinical treatment of related male reproductive disorders.
Liu SP, Li YF, Zhang D, Li CY, Dai XF, Lan DF, Cai J, Zhou H, Song T, Zhao YY, He ZX, Tan J, Zhang JD. · Asian journal of andrology (2025)
To date, we still need a comprehensive source of knowledge about the pharmacological effects of Epimedium and its bioactive compounds on the male reproductive system.
However, their actions in other tissues have been reviewed in recent years.
This review critically focuses on the Epimedium , its bioactive compounds, and the biochemical and molecular mechanisms that modulate vital pathways associated with the male reproductive system.
In plain English: The aim is to establish a solid foundation for optimizing the therapeutic use of ICA in the management of MetDs.
Song A, Wei R, Yang Y, Li H, Chen F, Pang Y, Ma X, Hao S. · Inflammopharmacology (2026)
Accumulating evidence indicates that ICA exerts beneficial effects by improving insulin resistance and modulating oxidative stress, fibrosis, inflammatory responses, and lipid metabolism.
Through these mechanisms, ICA influences the pathogenesis and progression of diabetes mellitus, osteoporosis, metabolic dysfunction-associated steatotic liver disease, obesity, and various metabolic disorders.
This review provides a comprehensive summary of recent advances in the application of ICA for the management of MetD, focusing on its molecular mechanisms, clinical applications, and research prospects.
In plain English: Consequently, this review contributes to a more profound comprehension of the recent advances in Epimedium research.
Cui J, Lin L, Hao F, Shi Z, Gao Y, Yang T, Yang C, Wu X, Gao R, Ru Y, Li F, Xiao C, Gao Y, Wang Y. · Frontiers in pharmacology (2024)
Epimedium Folium has been extensively utilized for medicinal purposes in China for a significant period.
This review undertakes a comprehensive examination of literature pertaining to Epimedium and its metabolites over the past decade, drawing from databases such as PubMed.
Consequently, this review contributes to a more profound comprehension of the recent advances in Epimedium research.
In plain English: This review provides a detailed account of how ICA modulates reproductive disorders via regulating immune responses, with the aim of offering innovative strategies for the design of novel immunomodulatory therapies targeting reproductive diseases.
Wang R, Chen Y, Xiao Q, Tang L, Zhang N. · Current issues in molecular biology (2026)
Icariin (ICA), a prenylated flavonoid glycoside isolated from Epimedium species (Horny Goat Weed), has a long-standing traditional use for "invigorating yang," which modern research attributes to its reproductive function-enhancing properties.
This review synthesizes emerging evidence that the beneficial effects of ICA on female and male reproductive health are primarily mediated through its sophisticated immunomodulatory actions on the reproductive-immune axis.
In plain English: In summary, as a multi-target natural compound, ICA demonstrates significant translational medicine potential in the comprehensive treatment of bone and joint diseases, providing a critical theoretical foundation for the development of novel therapeutic strategies.
Luo J, Wu L, Xu Y, Zhang J, Zhao X, Wang X. · Frontiers in pharmacology (2025)
However, the specific mechanisms underlying these effects have not yet been fully elucidated.
This paper focuses on the latest advances in the use of ICA for the treatment of skeletal and joint diseases, covering a range of conditions including osteoporosis, osteoarthritis, rheumatoid arthritis, intervertebral disc degeneration and fractures.
Building on this, we have systematically integrated its multi-target pharmacological mechanism network for the first time, elucidating its multi-pathway synergistic effects mediated by regulating the balance of the bone microenvironment.
In plain English: Conclusion Epimedium can effectively improve bone density and clinical symptoms in patients with POP, with good safety, making it a potential alternative or adjunctive treatment option, but more high-quality studies are needed to verify long-term efficacy.
Zhang XQ, Hua ZH, Huang CJ, Chen HY, Hu ZR, Zhang MR, Liu J. · Frontiers in medicine (2025)
Meta-analysis suggests that the overall efficacy rate of the Epimedium group was significantly higher than that of the control group (OR = 3.80; 95% CI: 2.27,6.37; p = 0.0001).
Serum alkaline phosphatase (ALP) was significantly reduced (MD = -8.78; 95% CI: -12.80, -4.77; <0.0001), while bone-specific alkaline phosphatase (BALP) increased (MD = 6.73; 95% CI: 3.32,10.14; p = 0.0001).
Adverse reactions were low, mainly mild gastrointestinal reactions or skin allergies.
In plain English: Therefore, this review systematically examines the targets and mechanisms through which ICA improves male reproductive function and evaluates its value as monotherapy or as a component of combination therapies, providing a theoretical framework and translational research direction for managing male reproductive disorders and enhancing assisted reproductive technologies outcomes.
Ran F et al. · European journal of pharmacology (2026)
It can significantly improve male reproductive function by regulating redox homeostasis, hormonal biosynthesis, and the balance between apoptosis and proliferation.
It may also be used in combination with pharmacological agents or biotechnological approaches to enhance therapeutic efficacy further.
In plain English: The EF treatment was proved to be a reliable alternative option for POP.
Li J, Huang X, Yuan Y, Zhang H, Zhou H, Xiong W, Li Y, Zhang Z, Qie F, Mao Y, Liang B, Shi X, Liu K. · Frontiers in pharmacology (2024)
The lumbar vertebra bone mineral density (BMD) was statistically different compared to the CG (MD = 0.03; 95% CI: 0.01, 0.04; p = 0.0003), but the clinical significance deserved consideration because the 95% CI nearly crossed the invalid line.
The femoral neck BMD was neither statistically different nor clinically different between two groups (MD = 0.00; 95% CI: 0.01, 0.02; p = 0.67).
The total complication rates were comparable among the two groups (RR = 0.68; 95% CI: 0.39, 1,19; p = 0.18).
In plain English: In this paper, the distribution of resources, chemical compositions, pharmacological effects, clinical applications and quality control of Epimedium Linn. are progressed to provide a reference for further research and development of the resources of this genus.
Chen XL, Li SX, Ge T, Zhang DD, Wang HF, Wang W, Li YZ, Song XM. · Chemistry & biodiversity (2024)
In this paper, the relevant literature on Epimedium Linn. was collected from 1987 to the present day, and more than 274 chemical constituents, including flavonoids, phenylpropanoids, lignans, phenanthrenes, and others, were isolated from this genus.
Modern pharmacological studies have shown that Epimedium Linn. has osteoprotective, neuroprotective, cardiovascular protective, and immune enhancing pharmacological effects.
In addition, Epimedium Linn. has been commonly used to treat osteoporosis, erectile dysfunction, hypertension and cardiovascular disease.
In plain English: Further research is needed to fully understand and harness the therapeutic potential of Epimedium and its bioactive compounds in respiratory diseases.
Song L, Lei C, Zheng C, Liu Y, Liu J, Yao D, Huang X. · Journal of pharmaceutical analysis (2026)
Traditional Chinese medicine (TCM), particularly the herb Epimedium , has demonstrated therapeutic potential in managing these diseases.
This review systematically evaluates evidence from both in vitro and in vivo studies to assess the effects of Epimedium and its bioactive compounds, including icariin (ICA), icariside I (ICS I), icariside II (ICS II), icaritin (ICT), and others, on respiratory diseases.
The synthesis of current literature reveals that these compounds exhibit anti-inflammatory, antioxidant, and immunomodulatory activities, as well as other effects crucial for the management of respiratory diseases.
In plain English: However, the toxicological profile and clinical evidence for ICA are still not well understood, and thus, more research is needed before ICA can be confirmed as a viable treatment.
Li S, Wang H, Ding S, Fang J, Liu G, Wang S. · The American journal of Chinese medicine (2026)
ICA intervenes in basic processes such as cellular stress, inflammation, metabolism and death through multiple targets and pathways, and can restore the body's balance in specific pathological states.
This study also explores new methods of preparing ICA with the goal of both expanding its therapeutic uses and supporting its clinical translation.
However, the toxicological profile and clinical evidence for ICA are still not well understood, and thus, more research is needed before ICA can be confirmed as a viable treatment.
In plain English: Yam-Epimedium and MLT may be the most effective for improving quality of life and overall health status.
Zeng J, Cheng J, Zhu L, Tang S. · BMC pulmonary medicine (2025)
Butyrate [MD = 2.7, 95% CrI (1.0, 4.4)], Nanocurcumin [MD = 13, 95% CrI (5.4, 21)], and probiotics [MD = 7.1, 95% CrI (5.2, 9.1)] significantly improved Forced Expiratory Volume in One Second (FEV1).
Nanocurcumin also slowed the decline in the ratio of Forced Expiratory Volume in One Second to Forced Vital Capacity (FEV1/FVC) [MD = 12, 95% CrI (5.5, 18)].
In plain English: These studies have not only provided a molecular mechanism-based explanation for the pharmacological effects of Epimedium, but also laid a theoretical foundation for the development of Epimedium-based precision therapeutic regimens.
Tong D, Chen L, Jiang Z, Ye X, Ma M, Ye A, Xu J. · Frontiers in pharmacology (2025)
The KEGG enrichment analysis results indicate that the signaling pathway of Epimedium treatment in Osteoarthritis may be closely related to the Lipid and atherosclerosis pathway, PPAR signaling pathway and Arachidonic acid metabolism.
Epimedium may treat osteoporosis with Nitrogen metabolism, GABAergic synapse, and Pathways in cancer.
These studies have not only provided a molecular mechanism-based explanation for the pharmacological effects of Epimedium, but also laid a theoretical foundation for the development of Epimedium-based precision therapeutic regimens.
In plain English: A 24-month randomized, double-blind, placebo-controlled trial found Epimedium-derived flavonoids helped prevent bone loss in late-postmenopausal women.
Zhang G et al. · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research (2007)
Reduced bone loss over 24 months in postmenopausal women
In plain English: Epimedium shows promise as an adjunctive therapy in patients with osteoporosis and periodontitis, contributing to improved BMD, reduced inflammation, and enhanced periodontal health, suggesting its potential for broader clinical application in managing these coexisting conditions.
Guo Y, Ge X, Wang W, Wang R, Chen Q, Wang H. · Medicine (2024)
Outcomes assessed included changes in bone mineral density (BMD), bone metabolism markers (β-CTx, N-MID, CT, ALP), periodontal indices (PD, AL, SBI, PLI), and inflammatory markers in gingival crevicular fluid (GCF) before and 6 months posttreatment.
Compared to the control group, the observation group showed significantly greater increases in lumbar spine and proximal femur BMD and reductions in BM markers (P < .05).
Epimedium shows promise as an adjunctive therapy in patients with osteoporosis and periodontitis, contributing to improved BMD, reduced inflammation, and enhanced periodontal health, suggesting its potential for broader clinical application in managing these coexisting conditions.
In plain English: A systematic review of ED/testosterone supplement ingredients found horny goat weed among common ingredients with only limited randomized evidence (most ingredients graded C/D).
Kuchakulla M et al. · International journal of impotence research (2021)
Common ED-supplement ingredient but limited RCT support
In plain English: An analysis of popular online erectile-dysfunction supplements found ingredients like horny goat weed widely used but under-supported by rigorous trials.
Balasubramanian A et al. · The journal of sexual medicine (2019)