Liver Support, Digestion, and Anti-Inflammatory Uses

How agrimony's tannins, flavonoids, and agrimoniin support liver enzyme normalization, blood sugar balance, and inflammation

Agrimony (Agrimonia eupatoria) is a gentle European herb with small yellow flowers, used for over a thousand years to support liver health, soothe digestion, and calm inflammation. Its leaves contain tannins, flavonoids — including quercetin, kaempferol, and luteolin — and a unique ellagitannin called agrimoniin that gives the plant its astringent and antioxidant character. In clinical research, agrimony tea significantly reduced the inflammatory marker interleukin-6 and raised HDL cholesterol in healthy adults after one month of daily use [2]. A randomized controlled trial found that an agrimony extract meaningfully reduced elevated liver enzymes in people with mild liver stress [4]. It is widely available as a dried herb for tea, liquid tincture, or capsules.

What Agrimony Contains and Why It Works

Agrimony leaves are dense with phenolic compounds — the same broad class of plant chemicals behind much of the science in herbs like turmeric and green tea. The key active constituents include:

Ellagitannins, especially agrimoniin, which is both astringent and anti-inflammatory
Flavonoids — quercetin, kaempferol, apigenin, and luteolin derivatives — that inhibit inflammatory enzymes and free radical damage
Phenolic acids including rosmarinic acid and ellagic acid, which support antioxidant defense
Triterpenoids and volatile oils with mild antimicrobial properties

Together these compounds explain why agrimony has historically been used as a wound wash, a digestive bitter, and a liver tonic across European, Chinese, and Native American traditions [5].

Liver Support

The most clinically significant finding for agrimony concerns liver enzyme normalization. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) are enzymes that leak from liver cells when they are stressed or inflamed — elevated levels are a common marker of nonalcoholic fatty liver, medication side effects, alcohol use, or metabolic strain.

An 8-week double-blind, placebo-controlled trial in 80 subjects with mildly to moderately elevated ALT (45–135 IU/L) found that agrimony aqueous extract produced a −15.7% reduction in ALT compared with a +2.5% change in the placebo group (p = 0.038). AST was similarly reduced (−6.4% vs. +3.2%, p = 0.040) [4]. Serum triglycerides also fell significantly in the treatment group. These are meaningful clinical numbers for a botanical intervention.

The mechanism appears to involve TLR-4 signaling inhibition in liver cells, reduction of oxidative stress, and direct anti-inflammatory action on hepatocytes [5].

For everyday support, agrimony fits alongside milk thistle (see our Milk Thistle page) and dandelion root (see our Dandelion Root page) as herbs that support the liver's ability to handle metabolic load.

Blood Sugar Regulation

Animal research from the late 1990s established an intriguing antidiabetic profile for agrimony. When incorporated into the diet of mice with induced diabetes, agrimony extract countered weight loss, excess thirst, excess eating, and hyperglycaemia. More specifically, an aqueous extract at 1 mg/ml stimulated glucose uptake into muscle (1.4-fold), enhanced glucose oxidation (1.4-fold), and increased glycogen synthesis (2.0-fold) — effects comparable to a low dose of insulin (0.1 μM) [1].

It also stimulated insulin secretion from pancreatic beta cells in a dose-dependent manner, suggesting it acts through multiple complementary pathways: directly mimicking insulin at muscle level, and also triggering the body's own insulin release.

This is preliminary animal data and not a substitute for medical blood sugar management, but it supports the traditional classification of agrimony as an antidiabetic plant and suggests value as a supporting herb alongside dietary changes for metabolic health.

Anti-Inflammatory and Antioxidant Effects

The human study by Ivanova et al. (2013) was the first intervention trial to test agrimony tea in people. Nineteen healthy volunteers drank 200 mL of agrimony tea twice daily for 30 days. At the end of the month, plasma total antioxidant capacity had significantly increased and interleukin-6 (IL-6) — a key driver of chronic systemic inflammation — had significantly decreased. HDL cholesterol improved, and HDL levels correlated with adiponectin, a hormone tied to insulin sensitivity [2].

Laboratory studies have elaborated the mechanisms. In LPS-stimulated macrophages, agrimony infusion reduced nitric oxide production, a marker of inflammatory activation. In animal models, the infusion showed both anti-inflammatory action (carrageenan-induced paw edema) and analgesic effects at non-toxic concentrations [3]. The main polyphenols identified — quercetin, kaempferol, apigenin, luteolin, and agrimoniin — are well-established modulators of NF-κB and COX-2 pathways.

Digestive and Antimicrobial Uses

Agrimony has been used as a digestive herb since antiquity, and the European Medicines Agency recognizes its traditional use for relief of mild diarrhea and minor mouth and throat inflammation. Its tannin content provides an astringent action in the gut, tightening loose intestinal tissue and reducing fluid secretion — a mechanism shared with other tannin-rich herbs like black tea and witch hazel.

Agrimony extracts show mild to moderate antibacterial activity against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa, which aligns with its traditional use as a wound wash. In biofilm studies, it prevented formation by Proteus mirabilis and Pseudomonas aeruginosa, which is relevant for skin wound healing. Some research also shows additive effects when combined with conventional antibiotics against resistant strains [5].

How to Use Agrimony

As a tea (most traditional form): Steep 2–4 g of dried agrimony herb in 250 mL hot water for 10–15 minutes, two to three times daily. This is the closest form to what was used in the clinical trials.

As a tincture: 1:5 tincture in 25–45% ethanol, typically 1–3 mL three times daily.

As a capsule or extract: Standardized extracts vary; follow label directions or work with a herbalist.

Agrimony is considered very safe for most people. There are no significant known drug interactions, though as with any herb with liver activity, caution is reasonable if taking hepatically metabolized medications. It is generally avoided in pregnancy due to lack of safety data.

Evidence Review

Gray and Flatt, 1998 (PMID 9797650)

This foundational study from the University of Ulster established the antidiabetic pharmacology of Agrimonia eupatoria in an animal model. Streptozotocin (STZ) was used to destroy pancreatic beta cells in mice, producing a model of type 1-like diabetes characterized by hyperglycaemia, weight loss, polydipsia, and hyperphagia.

Mice fed agrimony incorporated into their diet (62.5 g/kg food) and drinking water (2.5 g/L) over several weeks showed significant attenuation of all four diabetic symptoms. In isolated muscle tissue, agrimony aqueous extract at 1 mg/mL stimulated 2-deoxyglucose transport 1.4-fold, glucose oxidation 1.4-fold, and glycogen synthesis 2.0-fold — an effect comparable to 0.1 μM insulin. In pancreatic B-cell preparations, agrimony evoked a 1.9–3.8-fold stepwise increase in insulin secretion proportional to dose.

These results indicate agrimony contains compounds with insulin-mimicking activity at the peripheral level and insulin-secretagogue activity at the pancreatic level. No specific compound was isolated as the single driver in this study; the effect was attributed to the aqueous extract as a whole. This study set the stage for investigating agrimony as a supportive botanical in metabolic health contexts.

Ivanova, Vankova, and Nashar, 2013 (PMID 23078582)

This was the first human intervention study using agrimony tea. Nineteen healthy adult volunteers (aged 18–55) in Bulgaria consumed 200 mL of commercially prepared agrimony tea twice daily for 30 days. The study measured plasma total antioxidant capacity, lipid profile, and inflammatory markers at baseline and endpoint.

Key findings:

Plasma total antioxidant capacity increased significantly by the end of the intervention
Interleukin-6 (IL-6) decreased significantly — a notable finding since IL-6 is a central mediator of systemic inflammation and is elevated in metabolic syndrome, cardiovascular disease, and many chronic conditions
HDL cholesterol increased, and the increase correlated with adiponectin levels, suggesting improved insulin signaling as a secondary benefit

The study was small and uncontrolled (no placebo arm), which limits causal interpretation. However, the direction and magnitude of effects in healthy subjects is meaningful and consistent with the herb's known phytochemical profile.

Santos et al., 2017 (PMID 28491113)

This study from the University of Coimbra provided a detailed mechanistic picture of agrimony infusion's anti-inflammatory and analgesic properties. The researchers first characterized the polyphenolic content of agrimony aerial part infusion using HPLC-PDA-ESI/MSn analysis, identifying the major compounds as flavan-3-ols (catechin, epicatechin), quercetin glycosides, kaempferol glycosides, apigenin and luteolin derivatives, agrimoniin (the characteristic ellagitannin), and phenolic acids including p-coumaric and ellagic acid.

They then tested the infusion across multiple validated models:

DPPH, superoxide anion, hydroxyl radical, and SNAP assays confirmed robust antioxidant activity across multiple radical species
In vitro anti-inflammatory: significant reduction of NO production in LPS-stimulated RAW 264.7 macrophages at non-cytotoxic concentrations, with IC₅₀ values indicating meaningful potency
In vivo anti-inflammatory: carrageenan-induced paw edema in mice was significantly reduced compared to vehicle control
Analgesic (peripheral): acetic acid-induced writhing test showed reduction in pain behaviors
Analgesic (central): hot-plate and formalin tests indicated some central analgesic component as well

The study confirmed that the anti-inflammatory and analgesic effects are attributable to the synergistic action of multiple polyphenolic compounds, with agrimoniin, quercetin, and kaempferol derivatives likely playing leading roles through NF-κB and COX-2 inhibition.

Cho et al., 2018 (PMID 29486131)

This is the strongest clinical evidence for agrimony, representing a rigorous randomized, double-blind, placebo-controlled design. The trial enrolled 80 subjects at the Oriental Medical Hospital of Semyung University (South Korea) with mildly to moderately elevated ALT (45–135 IU/L) — a range indicating subclinical liver stress without diagnosed hepatic disease.

Participants received either agrimony aqueous extract (AEE) or placebo, two capsules twice daily, for 8 weeks. After excluding 11 subjects for protocol violations or consent withdrawal, 69 subjects contributed to analysis.

Results at week 8:

ALT: −15.7% in AEE group vs. +2.5% in placebo group (p = 0.038) — a statistically significant and clinically meaningful difference
AST: −6.4% vs. +3.2% (p = 0.040)
Serum triglycerides: significantly reduced in the AEE group
Safety: no serious adverse events reported; the extract was well tolerated

This trial's strength lies in its design (double-blind, placebo-controlled), its clinically relevant population (real-world mildly elevated liver enzymes rather than healthy subjects), and its biological plausibility given the known hepatoprotective mechanisms. The 15.7% ALT reduction in 8 weeks compares favorably to lifestyle intervention data for similar populations.

Paluch et al., 2021 (PMID 33646008)

This comprehensive review from Charles University and the Czech Academy of Sciences synthesized all available pharmacological research on Agrimonia eupatoria to that point. Key conclusions:

Agrimony's regulatory status in Europe recognizes it for traditional use in diarrhea, mouth/throat inflammations, and skin wound healing
Anti-inflammatory mechanisms include suppression of TNF-α, IL-6, and nitric oxide production through NF-κB pathway modulation
Hepatoprotective effects involve inhibition of TLR-4 signaling (which triggers liver inflammation) and direct antioxidant protection of hepatocytes
Antimicrobial effects against S. aureus are most consistent; moderate activity against E. coli and P. aeruginosa, with documented biofilm inhibition
Neuroprotective effects were noted in preliminary studies, with agrimoniin showing potential in Alzheimer's-relevant models
The review concluded that agrimony has a favorable safety profile with no documented serious adverse effects and no identified significant drug interactions

The authors noted that while the preclinical evidence is strong across multiple biological activities, further randomized controlled trials in humans are needed to establish clinical dose-response relationships and validate effects in diseased populations. The liver RCT (Cho 2018) remains the highest-quality human evidence to date.

Strength of Evidence Summary

Application	Evidence Level	Human Data?
Liver enzyme normalization	Moderate (1 RCT)	Yes
Anti-inflammatory (IL-6, NO)	Moderate (1 human, multiple animal)	Yes
Blood sugar / antidiabetic	Low-moderate (animal only)	No
Antioxidant capacity	Moderate (1 human, lab)	Yes
HDL improvement	Low (1 small human, uncontrolled)	Yes
Antimicrobial / wound support	Low (in vitro)	No

Agrimony occupies a well-evidenced middle ground among medicinal herbs — not as extensively trialed as berberine or milk thistle, but meaningfully above the purely traditional-use category. The liver RCT is a genuine clinical contribution, and the convergent evidence across anti-inflammatory mechanisms is consistent. It is best used as a supportive botanical alongside diet and lifestyle changes rather than as a primary therapeutic agent.

References

Actions of the traditional anti-diabetic plant, Agrimony eupatoria (agrimony): effects on hyperglycaemia, cellular glucose metabolism and insulin secretionGray AM, Flatt PR. British Journal of Nutrition, 1998. PubMed 9797650 →
Agrimonia eupatoria tea consumption in relation to markers of inflammation, oxidative status and lipid metabolism in healthy subjectsIvanova D, Vankova D, Nashar M. Archives of Physiology and Biochemistry, 2013. PubMed 23078582 →
Antioxidant, Anti-Inflammatory, and Analgesic Activities of Agrimonia eupatoria L. InfusionSantos TN, Costa G, Ferreira JP, Liberal J, Cruz MT, Batista MT. Evidence-Based Complementary and Alternative Medicine, 2017. PubMed 28491113 →
Agrimonia eupatoria L. (Agrimony) Extract Alters Liver Health in Subjects with Elevated Alanine Transaminase Levels: A Controlled, Randomized, and Double-Blind TrialCho YM, Kwon JE, Lee M, Lea Y, Jeon DY, Kim HJ, Kang SC. Journal of Medicinal Food, 2018. PubMed 29486131 →
The Therapeutic Effects of Agrimonia eupatoria L.Paluch Z, Biriczová L, Pallag G, Carvalheiro Marques E, Vargová N, Kmoníčková E. Physiological Research, 2021. PubMed 33646008 →