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Guava leaves are used to treat diarrhea. Bacterial infection by the bacteria Staphylococcus aureus disables the colon to absorb water. Tannins, which are strong anti-bacterial compound and essential oil, fight against the bacterial infection and inhibit the growth of the bacteria.
To treat diarrhea, wash about 6 leaves, boil and squeeze the leave to get the extract. Then drink it. Do this once in two days until you feel better.
High levels of cholesterol in the blood can cause health problems. Guava leaves contain active phytochemical compounds such as gallic acid, catechin, and epicatechin which can inhibit pancreatic cholesterol esterase which can reduce cholesterol level slightly.
Obesity may give rise to other health conditions like heart disease and diabetes. Guava leaves contain quercetin which can inhibit the formation of the fat cell and the catechin which has fat burning effect in the body.
Catechin in guava leaves can also control the blood glucose level. In other words, it has a hypoglycemic effect on the body. This in effect, may help to prevent type 2 diabetes.