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Tannins

In vitro

Mechanism of Action

Astringent compounds that reduce exudate and support tissue contraction in wound healing
Principal astringent constituents in bark, berries, and leaves; responsible for binding action on mucous membranes and hemostatic effect
Astringent polyphenols contributing mild anti-inflammatory, haemostatic, and mucosal-tightening activity
Anti-inflammatory through astringent and antioxidant actions; may reduce tissue inflammation and pain
Primary astringent constituents; responsible for haemostatic and wound-binding activity
Astringent and haemostatic activity; supports wound binding and reduced bleeding
Astringent and haemostatic activity; contributes to antidiarrheal and anti-hemorrhagic effects
Astringent action on respiratory tissues
Astringent action; staunches wound bleeding
Astringent; digestive toning effects
Astringent compounds contributing to wound-healing and skin-tightening effects
Astringent polyphenols responsible for toning and firming inflamed mucosae; central to traditional eye wash and compress activity
Astringent activity on gastrointestinal mucosa; anti-inflammatory at mucosal surfaces
Astringent action on inflamed mucous membranes; reduces excessive catarrhal secretion
Primary astringent and haemostatic agents; reduce mucous membrane secretion and support wound healing through protein precipitation
Astringent action on GI mucosa and vascular tissue; haemostatic and anti-diarrhoeal activity
Astringent action on respiratory and digestive tissues
Astringent compounds responsible for haemostatic and tissue-tightening actions; reduce mucosal permeability
Primary astringent compounds responsible for haemostatic and antidiarrheal effects
Astringent polyphenols; relevant to topical wound-healing and haemostatic traditional uses
Astringent compounds responsible for haemostatic activity and topical wound-healing properties
Secondary astringent constituents; some historical use in wound healing applications of the powdered root
Primary astringent and haemostatic compounds; protein-precipitating polyphenols explaining the antidiarrheal and wound-healing action
Astringent compounds in seed and aerial parts; antidiarrheal and bowel-binding action
Astringent polyphenols providing the herb's haemostatic and wound-consolidating properties
Astringent action reducing inflammation of urinary tissues
Major astringent compounds responsible for antidiarrheal activity by reducing bowel permeability and fluid secretion
Astringent compounds contributing to topical uses on ulcers and hardened tissues
Astringent compounds in seed and dried aerial parts; antidiarrheal and bowel-binding action
Astringent and styptic compounds contributing to wound-healing and haemostatic activity
Astringent compounds contributing to tissue-tightening and mild antimicrobial effects on mucous membranes
Primary astringent constituents responsible for hemostatic and wound-binding action
Astringent action through protein precipitation on mucosal surfaces; antioxidant activity through metal chelation and radical scavenging; antimicrobial effects through enzyme inhibition and cell membrane disruption
Primary active constituents; astringent, hemostatic, and antidiarrheal action through protein precipitation on mucosal surfaces
Astringent; hemostatic and wound-consolidating
Astringent polyphenols contributing to the binding and wound-closing actions described by Culpeper for hemorrhoids and bleeding
Contribute demulcent and mild astringent properties on inflamed mucous membranes of the respiratory tract
Astringent compounds providing hemostatic and anti-inflammatory effects on mucous membranes
Astringent action underpins hemostatic and wound-consolidating effects
Astringent action; may reduce mucus membrane irritation and inflammation
Primary astringent, antidiarrheal, and hemostatic constituents; precipitate proteins on mucosal surfaces to reduce inflammation and secretion
Astringent and vulnerary action

Research Notes

Tannin astringency is well-established for wound-healing applications across botanical medicine.

Mixed tannin fraction provides the primary astringent and hemostatic activity. Well-characterised polyphenol class.

Tannin astringency well characterised across multiple plant sources. Contributes to the overall digestive-toning profile of the herb.

BobinsanaSouth American

Well-established anti-inflammatory properties; in vitro evidence available

Tannins provide the primary astringent and haemostatic activity through protein precipitation and tissue tightening.

BugleWestern

Tannins provide the primary astringent and haemostatic activity in wound-healing preparations.

Tannins provide astringent and anti-hemorrhagic activity in traditional preparations.

ColtsfootWestern

Secondary compounds contributing to respiratory tract soothing.

CrosswortWestern

Established astringent mechanism for hemostatic applications.

Established astringent mechanism.

ElmWestern

Documented astringent and vulnerary activity in traditional use.

EyebrightWestern

Condensed tannins provide the astringent quality central to eyebright's traditional topical applications. Protein-precipitating activity tones inflamed mucosal tissues.

GooseberryWestern

Condensed tannins provide astringent and anti-inflammatory activity on GI mucosa. Well-characterised class of polyphenols.

Ground IvyIntegrative

Condensed tannins provide astringent action on inflamed mucosae, reducing excessive secretion. Consistent with anti-catarrhal applications.

HawkweedWestern

Condensed tannins are well-characterised astringent compounds. Haemostatic and wound-healing activity through mucosal protein precipitation is established.

HazelnutWestern

Mixed tannin fraction providing astringent, haemostatic, and anti-diarrhoeal activity. Well-characterised polyphenol class.

HorehoundWestern

Support overall respiratory and digestive effects.

HyssopWestern

Secondary compounds contributing to respiratory tract soothing and digestive astringency.

KnapweedWestern

Tannins provide the primary astringent and haemostatic activity through protein precipitation and mucosal tightening.

KnotgrassWestern

Tannins provide the primary astringent activity responsible for haemostatic and antidiarrheal effects.

Lady FernWestern

Condensed tannins provide astringent and haemostatic activity consistent with traditional wound-healing applications of root preparations.

Primary astringent compounds supporting haemostatic and wound-healing activity.

Male FernWestern

Minor astringent fraction. Wound-healing applications of powdered root are historical and lack modern evidence.

MoneywortWestern

Well-established astringent activity from tannin-rich herbs. Consistent with traditional haemostatic and antidiarrheal claims.

Responsible for the seed preparation described by Culpeper for diarrhea and dysentery.

MoonwortWestern

Astringent activity consistent with traditional wound-healing and haemostatic claims. Limited species-specific research.

PipsissewaWestern

Secondary compounds likely contributing to symptomatic relief through astringency.

Tannins are the primary active compounds responsible for the well-documented antidiarrheal and astringent activity.

RestharrowWestern

As described by Culpeper for wound and ulcer applications.

Contrasting binding/astringent action of seeds vs laxative roots documented in traditional use.

Royal FernWestern

Described by Culpeper and confirmed in folk use for wound healing.

Tannins provide astringent and mild antimicrobial activity. Consistent with traditional use for splenic and urinary complaints.

SanicleWestern

Tannins provide the primary astringent activity responsible for hemostatic effects on mucosal surfaces and wound-binding properties.

SassafrasWestern

Tannins in sassafras bark contribute to its traditional astringent and antimicrobial properties. While not unique to sassafras, the tannin content supports the historical use of sassafras bark preparations for wound healing, diarrhea, and topical skin conditions. Tannins may partially offset safrole absorption through complexation effects.

High tannin content is the primary active fraction. Astringent and protein-precipitating activity on mucosal surfaces is well established for condensed and hydrolysable tannin classes.

Established astringent mechanism.

StonecropWestern

Tannin fraction provides astringent and hemostatic activity consistent with traditional wound-healing applications.

SundewWestern

Tannin fraction provides demulcent and mild astringent activity on respiratory mucosa. Secondary to naphthoquinone fraction in pharmacological significance.

TamariskWestern

Tannin fraction responsible for astringent and hemostatic activity. Supports traditional use for bleeding and mucosal inflammation.

Established astringent mechanism.

Secondary compounds likely contributing to overall effect. Astringent tannins may soothe respiratory tissues and reduce cough triggers.

High tannin content in leaves accounts for the primary astringent and antidiarrheal activity. Well-characterised mechanism of mucosal protein precipitation.

Established astringent mechanism for wound healing.

Found In 43 Herbs

3D Molecular Structure

Polyphenol
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Tannins

PolyphenolSimple aromatic compounds with antimicrobial properties

Representative pattern: C₇H₆O₃

Atoms
Carbon
Oxygen
Hydrogen

Related Compounds (Polyphenol)

Live Research

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This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare practitioner before using any herbal product.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This content is for educational purposes only and is not a substitute for professional medical advice.