Verbenalin

Verbenalin at a Glance

Verbenalin, also called cornin, is an iridoid glycoside and the signature marker constituent of vervain (Verbena officinalis) — the bitter, glucose-bearing molecule most associated with the plant’s chemistry. It co-occurs with the closely related iridoid hastatoside, and the two are usually studied together ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →}.

Its most-cited signal is sleep-promoting / mildly sedative activity, which lines up with vervain’s long traditional use as a calming, sleep-supporting herb ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →}. A second, larger cluster of preclinical work reports neuroprotective, cardioprotective, anti-inflammatory and hepatoprotective effects across cell and rodent models ^{2,3,4,5,6,7,8Reference 2Lim J et al. · 2022AnimalVerbenalin reduces amyloid-beta peptide generation in cellular and animal models of Alzheimer’s diseaseView study →Reference 3Demiryürek AN et al. · 2023Protective effects of verbenalin and (+)-eudesmin against 6-hydroxydopamine-induced oxidative/nitrosative stress in SH-SY5Y cellsView study →Reference 4Xu Y et al. · 2016Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/β-catenin pathwayView study →Reference 5Lan T et al. · 2022Cornin protects against cerebral ischemia/reperfusion injury by preventing autophagy via the PI3K/Akt/mTOR pathwayView study →Reference 6Xu Y et al. · 2016Cardioprotection against experimental myocardial ischemic injury using corninView study →Reference 7Xu Q et al. · 2026Cornin, a compound from Verbena officinalis L., ameliorates preeclampsia progression through activating NO signaling and deactivating NF-κBView study →Reference 8Yang L et al. · 2023Verbenalin alleviates acute lung injury induced by sepsis and IgG immune complex through GPR18 receptorView study →}.

The honest headline is that all of this evidence is preclinical — in vitro and animal work on the isolated molecule. There are no human trials of verbenalin, and in practice it is encountered not as an isolate but as one iridoid among many in whole vervain, so plant-level effects can never be attributed to it alone.

Sleep, Sedation & the Vervain Tradition

Vervain has a long folk reputation as a mild relaxant and sleep aid, and verbenalin is one of the two constituents most often invoked to explain it. A study of Verbena officinalis identified verbenalin and hastatoside as the plant’s sleep-promoting components, the pair together accounting for the sedative signal ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →}. This is the clearest link between the molecule and vervain’s traditional use — but it remains a preclinical finding, not a demonstrated human hypnotic effect. The two iridoids are studied as a co-occurring pair rather than as a single active principle, which is why the herb, not the isolate, is the honest unit of any sleep claim.

What It's Used For

Beyond the sleep signal, verbenalin’s pharmacology is a broad but shallow preclinical portfolio: several distinct organ-protective effects, each resting on one or two animal or cell studies, with no clinical confirmation and little pharmacokinetic grounding.

Evidence by IndicationStrength of support · Beta

Support is an experimental score — weighted by study type (human > animal > in vitro) and volume. A beta, not a validated metric. Every row here rests on preclinical isolate data only, so scores are capped low; read the per-row basis.

01Sleep-promoting / sedativeShaky32%Isolate + co-component identified as vervain’s sleep-promoting principle; fits tradition ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →}

02NeuroprotectiveShaky30%Multiple cell/animal models (Alzheimer’s, Parkinson’s, stroke), all preclinical ^{2,3,4,5Reference 2Lim J et al. · 2022AnimalVerbenalin reduces amyloid-beta peptide generation in cellular and animal models of Alzheimer’s diseaseView study →Reference 3Demiryürek AN et al. · 2023Protective effects of verbenalin and (+)-eudesmin against 6-hydroxydopamine-induced oxidative/nitrosative stress in SH-SY5Y cellsView study →Reference 4Xu Y et al. · 2016Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/β-catenin pathwayView study →Reference 5Lan T et al. · 2022Cornin protects against cerebral ischemia/reperfusion injury by preventing autophagy via the PI3K/Akt/mTOR pathwayView study →}

03CardioprotectiveShaky24%Rat myocardial ischaemia–reperfusion + preeclampsia models ^{6,7Reference 6Xu Y et al. · 2016Cardioprotection against experimental myocardial ischemic injury using corninView study →Reference 7Xu Q et al. · 2026Cornin, a compound from Verbena officinalis L., ameliorates preeclampsia progression through activating NO signaling and deactivating NF-κBView study →}

04Anti-inflammatoryShaky22%Single mouse acute-lung-injury study via GPR18 ^{8Reference 8Yang L et al. · 2023Verbenalin alleviates acute lung injury induced by sepsis and IgG immune complex through GPR18 receptorView study →}

05HepatoprotectiveShaky20%Single mouse alcohol-steatohepatitis study ^{9Reference 9Dong J et al. · 2023Verbenalin attenuates hepatic damage and mitochondrial dysfunction in alcohol-associated steatohepatitis by regulating MDMX/PPARα-mediated ferroptosisView study →}

Mechanisms

Every row is a preclinical mechanism from a single isolate study; the pattern is a versatile organ-protective molecule on paper, with no unifying human-tested pathway.

Pharmacokinetics

Verbenalin’s human pharmacokinetics are poorly characterised. Like other iridoid glycosides — the class that includes aucubin, catalpol and harpagoside — it is a polar, sugar-bearing molecule expected to be poorly absorbed intact from the gut and subject to hydrolysis by intestinal microbiota to its aglycone (verbenalol) before or during absorption. No reliable oral bioavailability figure for verbenalin is available here, which is a significant caveat for the in-vitro effects above: concentrations that act on cells in a dish may not be reached in tissue after oral dosing.

Gap: absorption, bioavailability, active-metabolite identity and half-life for verbenalin are essentially uncharacterised — the missing link between the preclinical portfolio and any plausible human effect.

Clinical Trials

There are no clinical trials of isolated verbenalin. All published work is preclinical (cell and rodent), and human exposure occurs only indirectly through whole vervain preparations, which have their own limited clinical literature not attributable to this molecule.

Last checked: July 2026.

Isolate vs. Plant Studies

Verbenalin sits at an awkward point on the isolate-vs-plant axis. Almost all of its pharmacology is isolate data — purified verbenalin (or cornin) applied to cells or dosed in rodents ^{2,3,4,5,6,7,8,9Reference 2Lim J et al. · 2022AnimalVerbenalin reduces amyloid-beta peptide generation in cellular and animal models of Alzheimer’s diseaseView study →Reference 3Demiryürek AN et al. · 2023Protective effects of verbenalin and (+)-eudesmin against 6-hydroxydopamine-induced oxidative/nitrosative stress in SH-SY5Y cellsView study →Reference 4Xu Y et al. · 2016Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/β-catenin pathwayView study →Reference 5Lan T et al. · 2022Cornin protects against cerebral ischemia/reperfusion injury by preventing autophagy via the PI3K/Akt/mTOR pathwayView study →Reference 6Xu Y et al. · 2016Cardioprotection against experimental myocardial ischemic injury using corninView study →Reference 7Xu Q et al. · 2026Cornin, a compound from Verbena officinalis L., ameliorates preeclampsia progression through activating NO signaling and deactivating NF-κBView study →Reference 8Yang L et al. · 2023Verbenalin alleviates acute lung injury induced by sepsis and IgG immune complex through GPR18 receptorView study →Reference 9Dong J et al. · 2023Verbenalin attenuates hepatic damage and mitochondrial dysfunction in alcohol-associated steatohepatitis by regulating MDMX/PPARα-mediated ferroptosisView study →}. That would ordinarily be a strength, since it isolates the molecule’s own effect. The weakness is the other direction: those isolate effects have never been connected back to a human whole-plant outcome. The one finding that bridges molecule and plant is the sleep identification, where verbenalin and hastatoside were named as Verbena officinalis’s sleep-promoting components ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →} — but even there the plant’s calming reputation is traditional, not trial-proven. In real use, vervain delivers verbenalin alongside verbascoside, rosmarinic acid, luteolin, apigenin and other actives, so no whole-plant effect can be assigned to the iridoid alone.

Prevalence in Nature

Verbenalin is a characteristic iridoid of the genus Verbena, best known from the aerial parts of common vervain (Verbena officinalis), where it serves as a chemical marker ^{1Reference 1Makino Y et al. · 2009Hastatoside and verbenalin are sleep-promoting components in Verbena officinalisView study →}. It is also present in blue vervain (Verbena hastata), confirmed by phytochemical analysis of the whole plant ^{10Reference 10Yokosuka A et al. · 2021Chemical constituents of the whole plant of Verbena hastata and their inhibitory activity against the production of AGEsView study →}, and — under its synonym cornin — in the fruit of dogwood (Cornus officinalis).

Quantitative figures are uneven: published iridoid concentrations exist for V. officinalis, but the V. hastata analysis identified constituents without quantifying them, so no reliable content figure is available for blue vervain ^{10Reference 10Yokosuka A et al. · 2021Chemical constituents of the whole plant of Verbena hastata and their inhibitory activity against the production of AGEsView study →}. As with most iridoid glycosides, the compound contributes to the plant’s characteristic bitterness.

Discovery & Synthesis

Verbenalin is a long-recognised marker iridoid of Verbena, from which its principal name derives; the synonym cornin reflects its early isolation from dogwood (Cornus officinalis). A precise first-isolation date and a first total synthesis are not well documented here — verbenalin is obtained for research by extraction and purification from vervain or dogwood rather than by synthesis, and it is best understood as a plant-derived marker compound rather than a manufactured molecule.

Patents: not yet researched.

Toxicity & Safety

Verbenalin carries a low toxicity flag. It occurs in vervain, a herb with a long history of traditional use, and a dedicated genotoxicity screen supports the flag: a bacterial reverse mutation (Ames) test of verbenalin returned negative, indicating no mutagenic signal under those conditions ^{11Reference 11Shin HJ et al. · 2022Bacterial reverse mutation test of verbenalinView study →}. Beyond that, the isolated molecule has not been subject to formal repeat-dose, reproductive or interaction toxicology, so the low rating rests on the herb’s traditional-use record plus the single negative mutagenicity screen rather than a comprehensive safety package.

The most important caveat is not the isolate but the plant: vervain (Verbena officinalis) has a traditional reputation as a uterine stimulant and is customarily avoided in pregnancy. That caution attaches to the whole herb and to intake decisions made at the herb level, and it should be observed even though verbenalin itself has not been shown to be the responsible agent.

Safety at a Glance

✅ Low / no toxicity

• Low apparent toxicity. From a herb with a long traditional-use record; an Ames mutagenicity screen of verbenalin was negative ^{11Reference 11Shin HJ et al. · 2022Bacterial reverse mutation test of verbenalinView study →}.
• Vervain is traditionally avoided in pregnancy. The plant has a folk reputation as a uterine stimulant; this caution applies at the herb/product level regardless of the isolate’s own profile.
• Isolate safety is thin. No formal repeat-dose, reproductive or drug-interaction toxicology exists for purified verbenalin beyond the negative Ames test.

Dosage

There is no established human dose for verbenalin. It has never been administered to people as an isolated compound in a published trial; all dosing figures come from preclinical cell and rodent studies and do not translate into a recommendation. In practice, exposure is indirect — verbenalin is one bitter iridoid within whole vervain preparations, whose dosing is decided at the herb level and delivers many constituents at once.

These are research observations, not a personal recommendation.

References

1. Makino Y, Kondo S, Nishimura Y, et al. (2009). Hastatoside and verbenalin are sleep-promoting components in Verbena officinalis. Sleep and Biological Rhythms. https://doi.org/10.1111/j.1479-8425.2009.00405.x
2. Lim J, Kim S, Lee C, et al. (2022). Verbenalin reduces amyloid-beta peptide generation in cellular and animal models of Alzheimer’s disease. Molecules. https://pubmed.ncbi.nlm.nih.gov/36557811/
3. Demiryürek AN, Göktürk Ö, Saracaloglu A, et al. (2023). Protective effects of verbenalin and (+)-eudesmin against 6-hydroxydopamine-induced oxidative/nitrosative stress in SH-SY5Y cells. Molecular Biology Reports. https://pubmed.ncbi.nlm.nih.gov/36331750/
4. Xu Y, Zhang G, Kang Z, et al. (2016). Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/β-catenin pathway. Archives of Pharmacal Research. https://pubmed.ncbi.nlm.nih.gov/26276673/
5. Lan T, Xu Y, Li S, et al. (2022). Cornin protects against cerebral ischemia/reperfusion injury by preventing autophagy via the PI3K/Akt/mTOR pathway. BMC Pharmacology and Toxicology. https://pubmed.ncbi.nlm.nih.gov/36280856/
6. Xu Y, Xu Y, Luan H, et al. (2016). Cardioprotection against experimental myocardial ischemic injury using cornin. Brazilian Journal of Medical and Biological Research. https://pubmed.ncbi.nlm.nih.gov/26871971/
7. Xu Q, Zhu C, Li J, et al. (2026). Cornin, a compound from Verbena officinalis L., ameliorates preeclampsia progression through activating NO signaling and deactivating NF-κB. Phytomedicine. https://pubmed.ncbi.nlm.nih.gov/41483576/
8. Yang L, Liu T, Zhuo Y, et al. (2023). Verbenalin alleviates acute lung injury induced by sepsis and IgG immune complex through GPR18 receptor. Cellular Signalling. https://pubmed.ncbi.nlm.nih.gov/37315751/
9. Dong J, Du C, Xu C, et al. (2023). Verbenalin attenuates hepatic damage and mitochondrial dysfunction in alcohol-associated steatohepatitis by regulating MDMX/PPARα-mediated ferroptosis. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/36739928/
10. Yokosuka A, Honda M, Kondo M, et al. (2021). Chemical constituents of the whole plant of Verbena hastata and their inhibitory activity against the production of AGEs. Natural Product Communications. https://doi.org/10.1177/1934578X211009727
11. Shin HJ, Lim YG, Ha JS, et al. (2022). Bacterial reverse mutation test of verbenalin. Journal of Pharmacopuncture. https://pubmed.ncbi.nlm.nih.gov/36628351/

View all 11 references▾