Physcion

Physcion at a Glance

Physcion is a hydroxyanthraquinone aglycone — chemically, emodin’s 3-methyl ether (1,8-dihydroxy-3-methoxy-6-methylanthraquinone). It belongs to the same anthraquinone-laxative family as emodin, chrysophanol and rhein, and turns up across yellow dock, rhubarb and other Polygonaceae ^{7,8Reference 7Eom TJ et al. · 2020In-vitro antioxidant, anti-inflammation and anticancer activities and anthraquinone content from Rumex crispus rootView study →Reference 8Li P et al. · 2017AnimalPharmacokinetics and pharmacodynamics of rhubarb anthraquinones extract in normal and disease ratsView study →}.

What makes physcion its own molecule rather than a footnote to emodin is a double identity. Under the name parietin it is the orange pigment of wall lichens — a UV-screening cortical pigment — and in that setting it has been developed into a widely deployed agricultural antifungal ^{3,5Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →Reference 5Zhuang Z et al. · 2023Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatmentView study →}. Separately, it was singled out from a screen as a selective inhibitor of 6-phosphogluconate dehydrogenase (6PGD), an enzyme of the pentose-phosphate pathway that many tumours lean on — a genuinely physcion-distinctive line of cancer-metabolism research ^{1,2Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →Reference 2Wang B et al. · 2025Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathwayView study →}.

Two honest caveats frame everything below. First, all of physcion’s human-disease evidence is preclinical — cell and animal work on the isolated molecule, with no clinical trials. Second, physcion is generally less potent and less genotoxic than emodin, but it still sits inside the EU-restricted hydroxyanthracene-derivative class, so it is flagged with the same caution as its anthraquinone siblings ^{4,12Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →Reference 12EFSA ANS Panel · 2018Safety of hydroxyanthracene derivatives for use in foodView study →}.

Physcion as Parietin — Pigment & 6PGD Inhibitor

The single most physcion-distinctive story here is not shared with emodin or chrysophanol, and it has two halves that meet in one molecule.

The lichen pigment. Under its older name parietin, physcion is the dominant anthraquinone of the wall lichen Xanthoria parietina (once Parmelia parietina, the source of the name) and its relatives — the compound responsible for their vivid orange colour. In the lichen it works as a cortical screening pigment, absorbing UV-B (and blue) light and shielding the photosynthetic partner beneath ^{3Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}. This is a pigment-and-photoprotection role, analogous to how other plant molecules serve ecological functions unrelated to human pharmacology.

The 6PGD inhibitor. In a 2015 Nature Cell Biology study, physcion emerged from a screen as a selective inhibitor of 6-phosphogluconate dehydrogenase (6PGD) — the enzyme that catalyses the third, decarboxylating step of the oxidative pentose-phosphate pathway (PPP) ^{1Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →}. That pathway supplies tumour cells with two things they need in bulk: NADPH (for antioxidant defence and fatty-acid synthesis) and ribulose-5-phosphate (for nucleotide building blocks). Mechanistically, blocking 6PGD lowered NADPH and lipogenesis, raised reactive-oxygen species, and — through loss of ribulose-5-phosphate — relieved suppression of the LKB1–AMPK axis, activating AMPK. In cells and in nude-mouse xenografts, physcion and a semisynthetic derivative (S3) inhibited 6PGD and slowed tumour growth without obvious toxicity to the animals ^{1Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →}. Reported potency is modest — an IC₅₀ around the tens-of-micromolar range against the purified enzyme — consistent with a chemical-biology lead rather than a finished drug.

Follow-up work has extended the same 6PGD → AMPK/mTOR logic to other tumour types: in esophageal squamous cell carcinoma, 6PGD was over-expressed and associated with worse prognosis, and physcion suppressed growth via AMPK/mTOR while enhancing the effect of metformin ^{2Reference 2Wang B et al. · 2025Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathwayView study →}. The through-line is metabolic: physcion is being studied less as a cytotoxin and more as a switch on a specific tumour-fuelling enzyme.

The honesty line matters. This is a real, mechanistically coherent, target-defined story — and it is entirely preclinical. No human trial has tested physcion as a 6PGD inhibitor, and its poor oral pharmacokinetics (below) are a serious obstacle to translation.

Physcion vs. Emodin

Physcion is emodin with one change: a methyl group on the 3-hydroxyl (a 3-O-methyl ether). That small change shifts the molecule’s behaviour in ways worth stating plainly, because physcion’s profile is routinely — and wrongly — read straight off emodin’s much larger literature.

• Potency. Physcion is generally the weaker of the pair. In the anthranoid cytotoxicity/structure–activity series, the free-hydroxyl anthraquinones (emodin, aloe-emodin) tend to be more cytotoxic than their methylated or glycosylated relatives; masking a hydroxyl with a methyl ether blunts activity ^{11Reference 11Demarque DP et al. · 2018Cytotoxicity of structurally diverse anthranoids and correlation with mechanism of action and side effectsView study →}.
• Genotoxicity. This is the load-bearing contrast. In a dedicated food-toxicology study, emodin was genotoxic, while physcion (and chrysophanol) showed no genotoxic effects in the comet, micronucleus and mutation assays used ^{4Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →}. In Ames testing, physcion’s mutagenic signal appears only with metabolic activation, where emodin is mutagenic with or without it — again marking physcion as the softer molecule ^{4Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →}.
• What carries over. Both are hydroxyanthracene derivatives, so both fall inside the EU/EMA restriction of that class in food and supplements, and both are stimulant-laxative-class anthraquinones ^{12Reference 12EFSA ANS Panel · 2018Safety of hydroxyanthracene derivatives for use in foodView study →}. Physcion being individually less genotoxic does not exempt it from the class caution.

The practical reading: physcion’s own genotoxicity signal is genuinely soft, but it is not a clean molecule — its moderate flag leans on the regulated class it belongs to, not on a strong direct hazard of its own.

What It's Used For

Physcion’s evidence base is smaller and thinner than emodin’s, and it splits into one deployed real-world use (agricultural antifungal), one striking but preclinical mechanism (6PGD/anticancer), and a scatter of in-vitro activities from the lichen-chemistry literature.

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. Physcion’s evidence is preclinical (plus a deployed agricultural use), so human-facing scores stay low by design. Each application links to its write-up.

01Antifungal / crop biofungicideShaky40%Registered biopesticide; in-field powdery-mildew control + in-vitro antifungal ^{3,5,6Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →Reference 5Zhuang Z et al. · 2023Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatmentView study →Reference 6Zhang C et al. · 2022Association of physcion and chitosan can efficiently control powdery mildew in Rosa roxburghiiView study →}

02Anticancer (6PGD / pentose-phosphate pathway)Shaky38%Selective 6PGD inhibition; cell + xenograft, AMPK/mTOR — preclinical ^{1,2Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →Reference 2Wang B et al. · 2025Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathwayView study →}

03Antibacterial & antiproliferative (lichen parietin)Shaky26%In-vitro: S. aureus, breast-cancer cell apoptosis ^{3Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}

04Laxative (class effect)Shaky10%Anthraquinone class; active species are the glycosides, not free physcion ^{8,12Reference 8Li P et al. · 2017AnimalPharmacokinetics and pharmacodynamics of rhubarb anthraquinones extract in normal and disease ratsView study →Reference 12EFSA ANS Panel · 2018Safety of hydroxyanthracene derivatives for use in foodView study →}

Mechanisms

The load-bearing mechanism is 6PGD inhibition — a specific metabolic-enzyme target that is genuinely physcion’s own line of research, distinct from emodin’s broad NF-κB/kinase repertoire.

Pharmacokinetics

Physcion behaves like its anthraquinone siblings: lipophilic, poorly water-soluble, and poorly orally bioavailable. After oral dosing of rhubarb extract in rats, free physcion is barely detectable in plasma — it becomes measurable only after β-glucuronidase treatment of the samples, showing that it circulates almost entirely as glucuronide conjugates rather than free parent ^{9Reference 9Wu W et al. · 2014AnimalPharmacokinetics of anthraquinones in rat plasma after oral administration of a rhubarb extractView study →}. This mirrors emodin’s ~3–5% oral bioavailability driven by extensive intestinal/hepatic glucuronidation, and it is the key constraint on every systemic claim: the micromolar concentrations that inhibit 6PGD or fungi in vitro are difficult to reach as free physcion in blood after oral intake. No robust human ADME (Cmax, half-life, oral bioavailability) is established for the isolate.

Clinical Trials

There are no human efficacy trials of isolated physcion — for cancer, infection or any other indication. The human exposure that exists is incidental dietary and herbal intake of anthraquinone-containing plants, which is a multi-constituent, glycoside-dominated exposure, not a physcion result. Treat all disease-relevant data as preclinical.

Last checked: July 2026.

Isolate vs. Plant Studies

Physcion’s evidence is almost entirely the isolated molecule — but pulled from two different worlds. The anticancer/6PGD work uses purified physcion (and the semisynthetic S3 derivative) in cell and xenograft models ^{1,2Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →Reference 2Wang B et al. · 2025Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathwayView study →}, and the antibacterial/antiproliferative data use isolated parietin from lichen extract ^{3Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}. Even the agricultural antifungal use is the near-pure compound, applied as a formulated biopesticide ^{3,5Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →Reference 5Zhuang Z et al. · 2023Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatmentView study →}. So, unusually, there is little “whole-plant physcion” evidence to transfer — the caveat runs the other way: the human-relevant activities are demonstrated for the isolate in non-human systems (cells, mice, crops), and none has been tested in people. Where physcion appears as a plant constituent — in yellow dock or rhubarb — it is one minor anthraquinone in a laxative-dominated, glycoside-rich matrix, and the herb’s effects cannot be attributed to it ^{7,8Reference 7Eom TJ et al. · 2020In-vitro antioxidant, anti-inflammation and anticancer activities and anthraquinone content from Rumex crispus rootView study →Reference 8Li P et al. · 2017AnimalPharmacokinetics and pharmacodynamics of rhubarb anthraquinones extract in normal and disease ratsView study →}.

Prevalence in Nature

Physcion occurs across three biological kingdoms, which is part of what makes it interesting. In plants it is a hydroxyanthraquinone of the Polygonaceae — yellow dock (Rumex crispus) root, rhubarb (Rheum), Japanese knotweed — and it is reported from cascara sagrada and senna as well, generally as a smaller share of the anthraquinone pool than emodin ^{10,13Reference 10Vasas A et al. · 2015ReviewThe Genus Rumex: review of traditional uses, phytochemistry and pharmacologyView study →Reference 13Rumex crispus review · 2024ReviewRumex crispus L.: a comprehensive review of its botany, phytochemistry, pharmacology and safetyView study →}. Reported figures are fraction-dependent, not clean whole-plant percentages: physcion measured 34.9 mg/g in an enriched dichloromethane fraction of Rumex crispus root (behind emodin at 160.4 and chrysophanol at 67.0 in that fraction) ^{7Reference 7Eom TJ et al. · 2020In-vitro antioxidant, anti-inflammation and anticancer activities and anthraquinone content from Rumex crispus rootView study →}, and roughly 0.5% of a representative rhubarb free-anthraquinone extract ^{8Reference 8Li P et al. · 2017AnimalPharmacokinetics and pharmacodynamics of rhubarb anthraquinones extract in normal and disease ratsView study →} — neither of which should be read as a percentage of the crude drug. In the intact plant it is present largely bound as glycosides.

Beyond plants, physcion is the defining pigment of wall lichens — the orange Xanthoria parietina and its relatives — where, as parietin, it accumulates in the cortex as a UV-screening pigment ^{3Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}. It is also produced by some fungi (notably certain Aspergillus species), which is the basis for its industrial manufacture by fermentation ^{5Reference 5Zhuang Z et al. · 2023Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatmentView study →}. And it turns up at low levels in some foods: a food-survey study detected physcion (with emodin and chrysophanol) in beans, leafy vegetables and herbal liquors, though it judged the anthraquinones not a high-priority dietary genotoxic risk in a balanced diet ^{4Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →}.

Discovery & Synthesis

Physcion entered science not as a herbal constituent but as a pigment: it was long known as parietin, the orange colouring matter of the common wall lichen Xanthoria parietina (historically Parmelia parietina, from which the name derives), and the parallel name physcion traces to the lichen genus Physcia ^{3Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}. Its chemistry was later resolved as an anthraquinone — specifically emodin’s 3-methyl ether (1,8-dihydroxy-3-methoxy-6-methylanthraquinone), placing it firmly in the same family as the rhubarb/dock anthraquinones.

Manufacture today reflects the biopesticide market rather than the pharmacy. Because extraction from lichen or herb is inefficient, physcion is now produced by microbial fermentation followed by chemical methylation: engineered fungi (e.g. Aspergillus oryzae) are used to build the anthraquinone precursor, which is then O-methylated by alkali/chemical post-treatment to give physcion at useful scale for its role as an antifungal biopesticide ^{5Reference 5Zhuang Z et al. · 2023Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatmentView study →}. Classical total synthesis of the anthraquinone core is well established chemistry, but a physcion-specific first-total-synthesis attribution is not run down here.

Patents: not yet researched.

Toxicity & Safety

Physcion carries a moderate flag — the same as its anthraquinone siblings emodin, chrysophanol and rhein — even though its own direct genotoxicity signal is soft. The rating is a class judgement, not a claim of a strong individual hazard.

Safety at a Glance

⚠️ Moderate toxicity

• Individually low direct genotoxicity. Physcion was negative in the comet, micronucleus and mutation assays that flagged emodin as positive, and is Ames-mutagenic only with metabolic activation — the weaker, less-genotoxic member of the pair ^{4Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →}.
• Low mammalian toxicity in its deployed use. As a registered crop biofungicide it is valued for low mammalian toxicity and biodegradability, and 6PGD-inhibitor xenograft studies reported no obvious animal toxicity ^{1,3Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →Reference 3Basile A et al. · 2015Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietinView study →}.
• EU-restricted hydroxyanthracene class. Physcion is a hydroxyanthracene derivative and a stimulant-laxative-class anthraquinone; the EU/EMA restriction and genotoxicity concern applied to this class carry over to it, individual softness notwithstanding ^{12Reference 12EFSA ANS Panel · 2018Safety of hydroxyanthracene derivatives for use in foodView study →}.
• Stimulant-laxative cautions apply to the source herbs. Prolonged use of anthraquinone-laxative herbs (rhubarb, yellow dock, senna, cascara) can cause electrolyte (potassium) loss and is generally cautioned in pregnancy and breastfeeding — a herb-level decision, not adjudicated on this molecule page.
• Human safety data are thin. No dedicated human toxicology, repeat-dose or reproductive dataset exists for isolated physcion; absence of findings is not evidence of safety.

The reproductive/developmental note is prose-level and deliberate: stimulant anthraquinone laxatives are generally advised against in pregnancy, and anthraquinone metabolites can appear in breast milk, so anthraquinone-laxative herbs are cautioned in those states — but that decision belongs to the herb or product page where intake is decided, not to this molecule page, and no isolate-specific verdict is issued here.

Dosage

There is no established or safe human dose for isolated physcion, and nothing here is a recommendation. For reference only:

• Preclinical research used physcion in the micromolar range in cell assays and by injection/oral gavage in xenograft mice for the 6PGD/anticancer work ^{1,2Reference 1Lin R et al. · 2015Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/View study →Reference 2Wang B et al. · 2025Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathwayView study →}.
• Agricultural use applies dilute formulations (e.g. ~0.5% physcion, further diluted to low mg/L in spray solution) as a foliar biofungicide — a crop-protection rate, not a human dose ^{6Reference 6Zhang C et al. · 2022Association of physcion and chitosan can efficiently control powdery mildew in Rosa roxburghiiView study →}.
• Human intake is incidental: via anthraquinone-containing laxative herbs (dosed to the herb’s hydroxyanthracene-glycoside content, not to free physcion) and at low levels in some foods ^{4Reference 4Mueller SO et al. · 1999Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquorsView study →}. Given poor oral bioavailability ^{9Reference 9Wu W et al. · 2014AnimalPharmacokinetics of anthraquinones in rat plasma after oral administration of a rhubarb extractView study →}, oral physcion does not translate into meaningful systemic free-drug exposure.

These are research and agricultural figures, not a personal recommendation.

References

1. Lin R, Elf S, Shan C, et al. (2015). 6-Phosphogluconate dehydrogenase links oxidative PPP, lipogenesis and tumour growth by inhibiting LKB1–AMPK signalling. Nature Cell Biology. https://pubmed.ncbi.nlm.nih.gov/26479318/
2. Wang B, et al. (2025). Inhibition of 6-phosphogluconate dehydrogenase suppresses esophageal squamous cell carcinoma growth and enhances the anti-tumor effects of metformin via the AMPK/mTOR pathway. Molecular Cancer. https://pubmed.ncbi.nlm.nih.gov/40140842/
3. Basile A, Rigano D, Loppi S, et al. (2015). Antiproliferative, antibacterial and antifungal activity of the lichen Xanthoria parietina and its secondary metabolite parietin. International Journal of Molecular Sciences. https://pubmed.ncbi.nlm.nih.gov/25860944/
4. Mueller SO, Schmitt M, Dekant W, et al. (1999). Occurrence of emodin, chrysophanol and physcion in vegetables, herbs and liquors. Genotoxicity and anti-genotoxicity of the anthraquinones and of the whole plants. Food and Chemical Toxicology. https://pubmed.ncbi.nlm.nih.gov/10456676/
5. Zhuang Z, Zhong X, Li Q, et al. (2023). Production of the antifungal biopesticide physcion through the combination of microbial fermentation and chemical post-treatment. Bioresources and Bioprocessing. https://pubmed.ncbi.nlm.nih.gov/38647644/
6. Zhang C, et al. (2022). Association of physcion and chitosan can efficiently control powdery mildew in Rosa roxburghii. Antibiotics (Basel). https://pubmed.ncbi.nlm.nih.gov/36421305/
7. Eom TJ, et al. (2020). In-vitro antioxidant, anti-inflammation and anticancer activities and anthraquinone content from Rumex crispus root. Antioxidants (Basel). https://pubmed.ncbi.nlm.nih.gov/32784977/
8. Li P, Lu Q, Jiang W, et al. (2017). Pharmacokinetics and pharmacodynamics of rhubarb anthraquinones extract in normal and disease rats. Biomedicine & Pharmacotherapy. https://pubmed.ncbi.nlm.nih.gov/28475921/
9. Wu W, et al. (2014). Pharmacokinetics of anthraquinones in rat plasma after oral administration of a rhubarb extract. Biomedical Chromatography. https://pubmed.ncbi.nlm.nih.gov/24136708/
10. Vasas A, Orbán-Gyapai O, Hohmann J (2015). The Genus Rumex: review of traditional uses, phytochemistry and pharmacology. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/26384001/
11. Demarque DP, et al. (2018). Cytotoxicity of structurally diverse anthranoids and correlation with mechanism of action and side effects. Journal of Pharmacy & Pharmaceutical Sciences. https://pubmed.ncbi.nlm.nih.gov/30321134/
12. EFSA ANS Panel (2018). Safety of hydroxyanthracene derivatives for use in food. EFSA Journal. https://pubmed.ncbi.nlm.nih.gov/32625659/
13. Rumex crispus review (2024). Rumex crispus L.: a comprehensive review of its botany, phytochemistry, pharmacology and safety. International Immunopharmacology. https://pubmed.ncbi.nlm.nih.gov/39520965/

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