Astringents

Astringents are remedies that have a ‘binding’ action on tissue, usually due to a group of complex chemicals called tannins. The name tannin derives from their use in the tanning industry, and they share the property of precipitating, or curdling, protein molecules. As saliva and other body fluids contain proteins that are in solution, tannin containing astringents cause them to become insoluble and precipitate. This produces a coating on the surface of tissue composed of the body’s own protein, thus there is not problem with allergic reaction and as the precipitate is readily metabolized, the effect is short-lived. This leads to the important inference that astringents are effective mainly on tissue that the tannin content can physically reach.


Similar precipitation also happens with alkaloids and salts of heavy metals. One of the few incompatibilities in herbal medicine making is that astringent remedies will cause a precipitate with alkaloid rich herbs.


Therapeutically useful effects include:

  • A reduction of irritation on the surface of tissues due to a form of numbing.

  • A reduction in surface inflammation.

  • A barrier against infection is created which is of great help in wounds and burns.


Astringents may be indicated in a wide range of problems but especially in wound healing and conditions of the digestive system. Along the whole length of the digestive system they reduce inflammation and inhibit diarrhoea. Long-term use as medicine can be deleterious to health as there may be an eventual inhibition of proper food absorption across the gut wall.



Representative Herbal Astringents

Agrimony

Bayberry

Bearberry

Bistort

Blackberry

Bugleweed

Comfrey Root

Cranesbill

Elecampane

Eyebright

Golden Rod

Ground Ivy

Horse Chestnut

Kola Nut

Lesser Celandine

Lungwort

Meadowsweet

Mullein

Oak Bark

Periwinkle

Plantain

Raspberry

Red Sage

Rhubarb Root

Rosemary

Wild Cherry

Witch Hazel

Yarrow






Astringents that are also Anti-Catarrhal: Bearberry, Bistort, Cranesbill, Elecampane, Eyebright, Golden Rod, Ground Ivy, Mullein, Red Sage, Yarrow

Astringents that are also Anti-Inflammatory: Bistort, Cranesbill, Eyebright, Golden Rod, Meadowsweet, Oak Bark, Plantain, Witch Hazel

Astringents that are also Anti-Microbial: Bearberry, Elecampane, Golden Rod, Oak Bark, Red Sage, Rosemary, Yarrow

Astringents that are also Anti-Spasmodic: Bugleweed, , Red Sage, Rosemary, Wild Cherry

Astringents that are also Bitter: Agrimony, Wild Cherry, Yarrow

Astringents that are also Demulcent: Bearberry, Comfrey Root, Lungwort, Mullein, Plantain

Astringents that are also Diaphoretic: Bayberry, Elecampane, GoldenRod, Yarrow

Astringents that are also Diuretic: Agrimony, Bearberry, Bugleweed, Golden Rod, Ground Ivy, Kola Nut, Mullein, Plantain, Yarrow

Astringents that are also Emmenagogue: Raspberry, Yarrow

Astringents that are also Expectorant: Comfrey Root, Elecampane, Ground Ivy, Lungwort, Mullein, Plantain, Wild Cherry

Astringents that are also Hepatic: Agrimony Astringents that are also Hypotensive : Yarrow

Astringents that are also Nervine: KolaNut, Rosemary, Wild Cherry

Astringents that are also Tonic: Agrimony, Mullein, Raspberry, Yarrow

Astringents that are also Vulnerary: Agrimony, Comfrey Root, Cranesbill, Lungwort, Yarrow

David L. Hoffmann BSc Hons MNIMH Written by David L. Hoffmann BSc Hons MNIMH

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