Folium Psidii Guajavae

English Name

Guava Leaf

Latin Name

Folium Psidii Guajavae

Other Name

Fan Shi Liu Ye

SPEC

Whole, Cut

Package Style

PP+PE

Product Info

Description:

The leaf extracts of guava (Folium Psidii Guajavae) have shown to have in vitro toxic action against numerous bacteria. The leaves of guava are rich in flavonoids. The flavonoids have demonstrated anti-bacterial activity. This anti-bacterial property of guava leaves is what causes benefit to the teeth and gums.

Function:

The effects of Folium Psidii Guajavae extract on the bleeding time and the three main mechanisms of haemostasis: Vasoconstriction, platelet aggregation and blood coagulation, were investigated. The water extract of guava leaves did not shorten bleeding times in rats. Guava leaf extract potentiated the vascular muscle contraction induced in rabbits by phenylephrine, and when given alone it stimulated human platelet aggregation in vitro in a dose-dependent manner. On the other hand, it significantly prolonged blood coagulation; Activated partial thromboplastin time (APTT) test (p < 0.05). The higher the concentration of the extract, the longer APTT was observed. Thus, a water extract of guava leaves showed ambiguous effects on the haemostatic system. Guava leaf extract did not affect bleeding times, it stimulated vasoconstriction and platelet aggregation but it inhibited blood coagulation. Therefore, guava leaf extract is not recommended as a haemostatic agent.