Loquat leaves are rich in ursolic acid
Loquat leaf is from Eriobotryajaponica (Thunb.) Lindl. The dry leaf extract powder is rich of ursolic acid .It still contain the oleanolic acid, and other effective components are volatile oil, triterpenoid acids, sesquiterpene, flavonoids, polyphenols, organic acids, etc. It has anti-inflammatory and antitussive, blood sugar lowering, anti-virus, anti-tumor and other pharmacological activities.
The function of Loquat leaf extract
1. It has the Antitumor effect;
2. Antibacterial effect: The ethyl acetate extract and ethanol extract of loquat leaves have inhibitory effects on Staphylococcus aureus, Staphylococcus albicans, Streptococcus hemolyticus, Pneumococcus, and Catarrhal bacteria. Oleanolic acid extracted from loquat leaves has different degrees of bacteriostasis to staphylococcus aureus, hemolytic streptococcus, escherichia coli, dysentery frederii, typhoid bacillus, salmonella cholerae, etc.
3. Impact on the respiratory system: amygdalin in loquat leaves is decomposed into hydrocyanic acid and benzaldehyde by gastric acid or amygdalin enzyme. After absorption, it inhibits cytochrome oxidase, inhibits the oxidative metabolism of the common carotid artery body, and reflexively deepens respiration. It has a sedative effect on the respiratory center, and makes the respiratory movement quiet to achieve the effect of relieving cough and asthma. The loquat leaf decoction and its ethyl acetate extract have anti asthma and expectorant effects. The saponins in loquat leaves have the effect of inducing secretion of bronchial mucosa, and oral administration has an expectorant effect. Among them, caffeic acid has antitussive and expectorant effects.
4. Hypoglycemic effect. Triterpene acids and sesquiterpene compounds isolated from loquat leaf extract have obvious hypoglycemic effect on diabetes,
5. Protect the liver and reduce lipid. The oleanolic acid in loquat leaves can protect the liver and detoxify,
6. Immunomodulatory effect: Eriobotrya leaf triterpenoid acid (TAL) can enhance immunity.
7. Other effects: ursolic acid has a stabilizing and cooling effect. Amygdalin has a certain analgesic effect.
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