Eyebright:just the Greek Euphrasia.Euphrosyne.Gladness.
Contents
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- Brief Info and Botanical Description.
- Description of Eyebright.
- History and Name of Eyebright:Euphrasia.
- Phytochemicals and Active constituents.
- Medicinal Action and Uses of Eyebright.
- Therapeutics and Pharmacology of Eyebright.
- Dosage and Administration of Eyebright.
- Research Update of Eyebright:Euphrasia officinalis.
Phytochemicals and Active constituents.:
While there are many chemicals that may be active in eyebright, none of them has been proven to have any effect on eye inflammation or irritation. Some herbal texts suggest that the astringent actions of eyebright may reduce eye irritation while others suggest that eyebright may also have antibacterial actions topically. To date, there are no clinical studies to support or refute these proposed actions.
Generally speaking, including Tannins,Volatile oils, Phenolic acids, Iridoid glycosides (aucubin). The precise chemical constituents of the herb have not yet been recorded;it is known to contain a peculiar tannin,termed Euphrasia-Tannin acid (which gives a dark-green precipitate with ferric salts and is only obtainable by combination with lead) and also Mannite and Glucose,but the volatile oil and acrid and bitter principle have not yet been chemically analysed.
Constituents:
Iridoid glycosides, including aucubin.
Tannins, both condensed and hydrolysable gallic acid types
Phenolic acids including caffeic acid and ferulic acid
Volatile oil.
Miscellaneous; an unidentified alkaloid, sterols, amino acids and choline.
Eyebright contains:Approximately 12% tannins, both condensed tannins and hydrolysable tannins; gallic acid is among the hydrolysis products; ca. 0.2% volatile oil with seven major and numerous minor constituents; iridoid glycosides such as 0.05% aucubin, catalpol, euphroside, ixoroside. Lignans such as dehydrodiconiferylalcohol 4-b-D-glucoside, other phenylpropane glycosides, e.g. eukovoside, flavonoids, including quercetin and apigenin glycosides, traces of tertiary alkaloids, steam-volatile substances, a range of free and combined phenol-carboxylic acids principally caffeic acid, p-hydroxy-phenylpyruvic, and vanillic acids. Other constituents include: Bitter principles; beta-carotene; phytosterols (beta-sitosterol, stigmasterol); resin; carbohydrates; and vitamin C. [Duke JA. 1985. Eyebright. In Handbook of Medicinal Herbs. CRC Press, Boca Raton, FL, Pp. 193].
Anti-inflammatory acubin, antiviral caffeic acid, antiallergenic ferulic acid.Eyebright has been used as a folk medicine to treat eye inflammations and infections, coughs, and poor memory. Eyebright has been used since the middle ages as a tonic and astringent. The constituents of eyebright include vitamin A, vitamin C, vitamin D, vitamin B complex, iron, silicon, iodine, copper, and zinc. Other ingredients of eyebright include flavonoids (rutin and quercetintannins), iridoid glycosides, essential fatty acids, glycoside aucuboside, caffeic and ferulic acids, sterols, choline, and a volatile oil.
Reference:
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- 1.Eyebright:just the Greek Euphrasia.Euphrosyne.Gladness.
Article Information:
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