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Guava Extract

Quick details
Type: Guava Extract,Fruit Extract Guava Extract
Guava Extract
Form: Powder
Part: Fruit
Extraction Type: Solvent Extraction
Test Method: HPLC
Appreance: Brown Powder
Particle Size: 100% Pass 80 Mesh
Plant Source: Psidium Guajava L
Active Ingredients: 40%80% polyphenols
Storage: Store In Cool and Dry Area
Application: Pharmaceutical, Food and Cosmetic
Odor: Characteristic

The bark and leaf extracts of guava (Psidium guajava) 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.
The effects of guava leaf 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.



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