Compound Monograph
Corilagin
Corilagin is a water-soluble ellagitannin from Phyllanthus, Terminalia and Geranium. Well-studied preclinically as an anti-inflammatory (NLRP3/NF-κB/TNF) with antiviral (herpes) and anticancer signals — all in vitro or animal, with no human trials and poor oral bioavailability.
Sources · 8
Where Does It Come From?
Corilagin is a naturally occurring ellagitannin (hydrolyzable tannin), found in Chanca piedra, Arjuna, Bearberry and 5 other sources. It is well tolerated orally (low toxicity).
Principal source Chanca Piedra Phyllanthus niruri Herb monograph →
Source Amla Phyllanthus emblica Herb monograph →
Source Arjuna Terminalia arjuna Herb monograph →
Source Bearberry Arctostaphylos uva-ursi Herb monograph →
Source Haritaki Terminalia chebula Herb monograph → Concentration
Content by Source
Concentrations not reported. No percent-dry-weight or mg/g figures have been published for this compound in its source plants.
Corilagin at a Glance
Corilagin is a water-soluble ellagitannin found in Phyllanthus, Terminalia and Geranium species — a smaller and more soluble member of the tannin family than the punicalagins.
It is well studied preclinically as an anti-inflammatory acting on NLRP3 inflammasome and NF-kB signalling, with antiviral activity against herpes viruses and anticancer signals alongside.
All of it is in vitro or animal work; no human data exist.
What It's Used For
Corilagin is a hydrolyzable tannin (ellagitannin) — closely related to ellagic acid and to geraniin (which hydrolyses to corilagin) — found in Phyllanthus, Terminalia, Geranium and many plants. Its best-characterized, most-replicated action is anti-inflammatory, centered on the NLRP3 inflammasome and NF-κB 4Reference 4Corilagin restrains NLRP3 inflammasome activation and pyroptosis through the ROS/TXNIP axisView study →.
Two honesty points frame the page. First, the famous Phyllanthus “anti-hepatitis-B” reputation is not supported by isolated-corilagin data — the real isolate antiviral signal is against herpesviruses 8Reference 8Corilagin protects against HSV-1 encephalitis via inhibiting the TLR2 signalling pathwaysView study →.
Second, as a large water-soluble tannin, corilagin has poor oral bioavailability 16Reference 16ReviewTherapeutic potential of ellagitannins: a comprehensive review of key representativesView study →, and its entire evidence base is preclinical (in vitro and rodent).
Support is an experimental score — weighted by study type (human > animal > in vitro) and volume. A beta, not a validated metric. The evidence is entirely preclinical, so scores stay low by design. Each application links to its write-up.
The best-characterized action. Corilagin restrains the NLRP3 inflammasome via ROS/TXNIP and blocks pyroptosis 4Reference 4Corilagin restrains NLRP3 inflammasome activation and pyroptosis through the ROS/TXNIP axisView study →, inhibits NLRP3 through Olfr2 signaling to alleviate atherosclerosis 11Reference 11Corilagin alleviates atherosclerosis by inhibiting NLRP3 inflammasome activation via the Olfr2 pathwayView study →, and reduces acute lung injury by inhibiting RIP1-driven necroptosis (with SPR-confirmed target binding) 12Reference 12Corilagin alleviates acute lung injury by inhibiting RIP1-driven necroptosisView study → — with genus-level NF-κB/MAPK support from Terminalia tannin fractions 15Reference 15The hydrolysable-tannin fraction of Terminalia chebula modulates NF-κB and MAPK signallingView study →.
Gap: each study uses a different disease model and a different upstream node, with no single dose/target replicated head-to-head, and the TNF-α/NF-κB effects are downstream readouts rather than proven primary targets 4,
The real isolate antiviral story is herpesvirus. Corilagin protected against HSV-1 encephalitis via TLR2 inhibition 8Reference 8Corilagin protects against HSV-1 encephalitis via inhibiting the TLR2 signalling pathwaysView study →, interfered with TLR3-mediated responses in herpes-simplex encephalitis 9Reference 9Corilagin interferes with the TLR3-mediated immune response in herpes-simplex encephalitisView study →, and blocked HSV-2 replication via the cGAS–STING axis 10Reference 10Corilagin interferes with HSV-2 replication via the cGAS–STING axisView study →.
Gap: the “anti-HBV / Phyllanthus” reputation is not supported by isolated-corilagin data — that traces to whole-decoction work — so the isolate signal is herpesvirus, not hepatitis B 8Reference 8Corilagin protects against HSV-1 encephalitis via inhibiting the TLR2 signalling pathwaysView study →.
Corilagin inhibited ovarian cancer growth by blocking TGF-β/Smad/ERK/AKT 5Reference 5Corilagin inhibits ovarian cancer growth by blocking the TGF-β signalling pathwayView study → and suppressed esophageal squamous-cell carcinoma via DNA damage and RNF8 downregulation with cisplatin sensitization 6Reference 6Corilagin in esophageal squamous-cell carcinoma: DNA damage and RNF8 downregulationView study →, as synthesized in a dedicated review 13Reference 13Corilagin in cancer: a critical evaluation of anticancer activities and molecular mechanismsView study →.
Gap: cell-line and xenograft only, at high in-vitro concentrations, with no pharmacokinetic bridge to achievable human exposure — nowhere near clinical 5,
Corilagin restored glutathione and SOD, lowered ALT/AST, and suppressed TNF-α/NF-κB/COX-2 in a bioassay-guided Phyllanthus niruri study 1Reference 1In-depth hepatoprotective mechanistic study of Phyllanthus niruri: in-vitro and in-vivo studies and its chemical characterizationView study → — where it also contributes α-glucosidase inhibition in the extract assays 2Reference 2Investigation of antidiabetic potential of Phyllanthus niruri (α-glucosidase)View study →.
Gap: corilagin is one of several actives in the fraction, so the effect is co-attributed, not cleanly isolate-only 1Reference 1In-depth hepatoprotective mechanistic study of Phyllanthus niruri: in-vitro and in-vivo studies and its chemical characterizationView study →.
Corilagin potentiates β-lactams against MRSA by inactivating the resistance protein PBP2a 3Reference 3Mechanisms of action of corilagin and tellimagrandin I that remarkably potentiate the activity of beta-lactams against methicillin-resistant Staphylococcus aureusView study →.
Gap: in-vitro only, and narrow — an adjuvant effect rather than a standalone antibiotic, with no in-vivo confirmation 3Reference 3Mechanisms of action of corilagin and tellimagrandin I that remarkably potentiate the activity of beta-lactams against methicillin-resistant Staphylococcus aureusView study →.
Mechanisms
| Target / pathway | Effect | Relevant to |
|---|---|---|
| NLRP3 inflammasome (ROS/TXNIP; Olfr2) | ↓ activation, blocks pyroptosis | anti-inflammatory |
| RIP1 / necroptosis | direct binding → inhibits necroptosis | anti-inflammatory (lung injury) |
| NF-κB / MAPK; TNF-α, COX-2 | suppression | anti-inflammatoryhepatoprotective |
| TLR2 / TLR3; cGAS–STING | ↓ signaling / ↓ viral replication | antiviral (herpes) |
| TGF-β/Smad, ERK/AKT; DNA damage / RNF8 | blockade; pro-apoptotic | anticancer |
| PBP2a | inactivation → restores β-lactam efficacy | antimicrobial (MRSA) |
Pharmacokinetics
Poor oral bioavailability is expected and load-bearing. Corilagin is a large (~634 Da), highly hydroxylated, water-soluble hydrolyzable tannin, subject to the class-level absorption barrier of ellagitannins — gastrointestinal hydrolysis (to gallic acid and ellagic-acid/HHDP fragments) and extensive gut-microbial metabolism, so intact-corilagin plasma exposure is low 16Reference 16ReviewTherapeutic potential of ellagitannins: a comprehensive review of key representativesView study →. No clean isolated-corilagin human ADME study exists, so this is an inference from ellagitannin class behavior. One concrete interaction datapoint has emerged: corilagin influenced the pharmacokinetics of sitagliptin via CYP450 in a 2025 study 14Reference 14CYP450/network-pharmacology study of corilagin’s influence on sitagliptin pharmacokineticsView study →.
Clinical trials
There are no human trials of isolated corilagin. All efficacy evidence is in-vitro or rodent, and human exposure to date is only incidental — via Phyllanthus and other tannin-containing herbal teas and extracts, where corilagin is a minor fraction, not a characterized isolate dose 7Reference 7Validated HPLC method for the standardisation of Phyllanthus niruri using corilaginView study →.
| Completed | Planned | Terminated | Preclinical |
|---|---|---|---|
| —(none, isolate) | — | — | Extensive |
Last checked: July 2026.
Toxicity & Safety
Corilagin has no observed toxicity signal, but that is not the same as safe — it is simply not formally characterized in humans, and as a hydrolyzable tannin it carries the class’s real interaction profile with iron and co-administered drugs.
- No toxicity signal surfaced. Effective doses in rodent inflammation and cancer models were tolerated.
- Avoid in pregnancy and lactation. No reproductive data, DNA-damaging mechanisms and tannin iron-binding.
- Binds non-heme iron. Can reduce iron absorption — relevant if you supplement iron or are deficient.
- Altered sitagliptin pharmacokinetics via CYP450. Take care with narrow-therapeutic-index or CYP-substrate co-medication.
- Astringent at high oral intakes. Tannins can be gastrointestinally irritating in quantity.
- No formal toxicology study exists. “Not characterized” is the honest verdict, not “safe.”
Full Safety & Interactions Detail
No specific isolated-corilagin toxicity signal surfaced across the reviewed pharmacology, and effective doses in rodent inflammation and cancer models were tolerated — but there is no formal toxicology study, so the honest statement is “not formally characterized in humans,” not “safe.” As a hydrolyzable tannin, high oral intakes can be astringent and gastrointestinally irritating, and the interaction profile is real for the class: tannins bind non-heme iron and can reduce its absorption (relevant with iron supplements or deficiency) and complex with proteins and some co-administered drugs, and corilagin specifically altered sitagliptin pharmacokinetics via CYP450 14Reference 14CYP450/network-pharmacology study of corilagin’s influence on sitagliptin pharmacokineticsView study → — so caution is warranted with narrow-therapeutic-index or CYP-substrate co-medication.
Dosage
There is no established human dose, and nothing here is a recommendation. Rodent studies use mg/kg intraperitoneal or oral doses that do not translate to a human recommendation, especially given poor oral bioavailability, and real-world exposure is only as a minor fraction (~2.4–6.7%) of Phyllanthus/chanca-piedra aqueous extracts 7Reference 7Validated HPLC method for the standardisation of Phyllanthus niruri using corilaginView study →.
References
- Ezzat SM, et al. (2020). In-depth hepatoprotective mechanistic study of Phyllanthus niruri: in-vitro and in-vivo studies and its chemical characterization. PLoS One. https://pubmed.ncbi.nlm.nih.gov/31940365/
- Najari Beidokhti M, et al. (2017). Investigation of antidiabetic potential of Phyllanthus niruri (α-glucosidase). Biochemical and Biophysical Research Communications. https://pubmed.ncbi.nlm.nih.gov/28928090/
- Shiota S, et al. (2004). Mechanisms of action of corilagin and tellimagrandin I that remarkably potentiate the activity of beta-lactams against methicillin-resistant Staphylococcus aureus. Microbiology and Immunology. https://pubmed.ncbi.nlm.nih.gov/14734860/
- Luo J, et al. (2022). Corilagin restrains NLRP3 inflammasome activation and pyroptosis through the ROS/TXNIP axis. Oxidative Medicine and Cellular Longevity. https://pubmed.ncbi.nlm.nih.gov/36299604/
- Jia L, et al. (2013). Corilagin inhibits ovarian cancer growth by blocking the TGF-β signalling pathway. BMC Complementary and Alternative Medicine. https://pubmed.ncbi.nlm.nih.gov/23410205/
- Qiu F, et al. (2019). Corilagin in esophageal squamous-cell carcinoma: DNA damage and RNF8 downregulation. Anti-Cancer Agents in Medicinal Chemistry. https://pubmed.ncbi.nlm.nih.gov/30848215/
- Colombo R, et al. (2009). Validated HPLC method for the standardisation of Phyllanthus niruri using corilagin. Biomedical Chromatography. https://pubmed.ncbi.nlm.nih.gov/19277954/
- Guo YJ, et al. (2015). Corilagin protects against HSV-1 encephalitis via inhibiting the TLR2 signalling pathways. Molecular Neurobiology. https://pubmed.ncbi.nlm.nih.gov/25367881/
- Li LJ, Zhang SJ, Liu P, et al. (2019). Corilagin interferes with the TLR3-mediated immune response in herpes-simplex encephalitis. Frontiers in Molecular Neuroscience. https://pubmed.ncbi.nlm.nih.gov/31080403/
- Zhang H, Cheng L, Zhou X, et al. (2026). Corilagin interferes with HSV-2 replication via the cGAS–STING axis. Journal of Biomolecular Structure and Dynamics. https://pubmed.ncbi.nlm.nih.gov/40432333/
- Mao J, Chen Y, Zong Q, et al. (2024). Corilagin alleviates atherosclerosis by inhibiting NLRP3 inflammasome activation via the Olfr2 pathway. Frontiers in Immunology. https://pubmed.ncbi.nlm.nih.gov/38803504/
- Ye J, Huang Y, Wu S, et al. (2025). Corilagin alleviates acute lung injury by inhibiting RIP1-driven necroptosis. Chinese Journal of Natural Medicines. https://pubmed.ncbi.nlm.nih.gov/41435587/
- Gupta A, et al. (2019). Corilagin in cancer: a critical evaluation of anticancer activities and molecular mechanisms. Molecules. https://pubmed.ncbi.nlm.nih.gov/31546767/
- Siva B, Sherin S, Somabattni RA, et al. (2025). CYP450/network-pharmacology study of corilagin’s influence on sitagliptin pharmacokinetics. Biochemical Pharmacology. https://pubmed.ncbi.nlm.nih.gov/40287102/
- Ekambaram SP, Aruldhas J, Srinivasan A, et al. (2022). The hydrolysable-tannin fraction of Terminalia chebula modulates NF-κB and MAPK signalling. Journal of Pharmacy and Pharmacology. https://pubmed.ncbi.nlm.nih.gov/35134979/
- Mihaylova R, Elincheva V, Momekov G, et al. (2025). Therapeutic potential of ellagitannins: a comprehensive review of key representatives. Molecules. https://pubmed.ncbi.nlm.nih.gov/41302388/
