Compound Monograph

Corilagin

Phenolics Tannins Natural (plant-derived)

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).

Also found in
Geranium species Monograph coming soon
Pomegranate Monograph coming soon
Terminalia chebula and other Terminalia species Monograph coming soon

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 4Luo J et al. · 2022Corilagin 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 8Guo YJ et al. · 2015Corilagin 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 16Mihaylova R et al. · 2025ReviewTherapeutic potential of ellagitannins: a comprehensive review of key representativesView study →, and its entire evidence base is preclinical (in vitro and rodent).

A strong anti-inflammatory signal:restrains the NLRP3 inflammasome (via ROS/TXNIP) and blocks pyroptosis, replicated across atherosclerosis and acute-lung-injury models 4,11,12Reference 4Luo J et al. · 2022Corilagin restrains NLRP3 inflammasome activation and pyroptosis through the ROS/TXNIP axisView study →Reference 11Mao J et al. · 2024Corilagin alleviates atherosclerosis by inhibiting NLRP3 inflammasome activation via the Olfr2 pathwayView study →Reference 12Ye J et al. · 2025Corilagin alleviates acute lung injury by inhibiting RIP1-driven necroptosisView study →.
The isolate antiviral evidence is herpes, not hepatitis B:corilagin protects against HSV encephalitis (TLR2/TLR3) and blocks HSV-2 via cGAS–STING — the HBV fame belongs to whole Phyllanthus decoctions, not the isolate 8,9,10Reference 8Guo YJ et al. · 2015Corilagin protects against HSV-1 encephalitis via inhibiting the TLR2 signalling pathwaysView study →Reference 9Li LJ et al. · 2019Corilagin interferes with the TLR3-mediated immune response in herpes-simplex encephalitisView study →Reference 10Zhang H et al. · 2026Corilagin interferes with HSV-2 replication via the cGAS–STING axisView study →.
The honest headline:no human trials, poor oral bioavailability, and the hepatoprotective/α-glucosidase data are co-attributed to Phyllanthus fractions, not the isolate alone 1,16Reference 1Ezzat SM et al. · 2020In-depth hepatoprotective mechanistic study of Phyllanthus niruri: in-vitro and in-vivo studies and its chemical characterizationView study →Reference 16Mihaylova R et al. · 2025ReviewTherapeutic potential of ellagitannins: a comprehensive review of key representativesView study →.
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. The evidence is entirely preclinical, so scores stay low by design. Each application links to its write-up.

Mechanisms

Target / pathwayEffectRelevant to
NLRP3 inflammasome (ROS/TXNIP; Olfr2)↓ activation, blocks pyroptosis
anti-inflammatory
RIP1 / necroptosisdirect binding → inhibits necroptosis
anti-inflammatory (lung injury)
NF-κB / MAPK; TNF-α, COX-2suppression
anti-inflammatoryhepatoprotective
TLR2 / TLR3; cGAS–STING↓ signaling / ↓ viral replication
antiviral (herpes)
TGF-β/Smad, ERK/AKT; DNA damage / RNF8blockade; pro-apoptotic
anticancer
PBP2ainactivation → 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 16Mihaylova R et al. · 2025ReviewTherapeutic 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 14Siva B et al. · 2025CYP450/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 7Colombo R et al. · 2009Validated HPLC method for the standardisation of Phyllanthus niruri using corilaginView study →.

CompletedPlannedTerminatedPreclinical
—(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.

Safety at a Glance
Low / no toxicityDrug interactions
  • 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 14Siva B et al. · 2025CYP450/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 7Colombo R et al. · 2009Validated HPLC method for the standardisation of Phyllanthus niruri using corilaginView study →.

References

  1. 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/
  2. 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/
  3. 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/
  4. 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/
  5. 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/
  6. 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/
  7. 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/
  8. 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/
  9. 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/
  10. 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/
  11. 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/
  12. 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/
  13. 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/
  14. 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/
  15. 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/
  16. 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/