Guava, Psidium guajava, is an evergreen shrub or small tree in the family Myrtaceae grown for its edible fruits. … The fruit is oval in shape and green to yellow in color. The flesh inside can be white, yellow, pink or red in color and contains numerous yellowish seeds.
Guava leaf tea may help prevent spikes in blood sugar and improve symptoms in people with?type 2 diabetes.
A?2010 review?of evidence from clinical trials and animal studies suggests that guava leaf tea may help improve?insulin resistance?and lower blood sugar levels.
These benefits may result from compounds in guava leaf extract helping to moderate glucose absorption after a person eats a meal.
Taking supplements containing guava leaf extract may reduce menstrual cramps.
The results of a?study from 2007?suggest that taking guava leaf extract supplements may relieve menstrual pain in women with primary dysmenorrhea.
Participants who took 6 milligrams (mg) of the extract each day experienced less menstrual pain than those taking ibuprofen or a?placebo.
Guava leaf tea is a traditional remedy for diarrhea in many parts of the world.
Evidence from animal studies suggests that the leaf extract may have the potential to treat infectious diarrhea.
A?2015 study?investigated the use of this extract in mice with infectious diarrhea. The infection cleared more quickly in the mice who consumed guava leaf extract than in those who did not. The researchers noted that guava leaf extract shows promise as a treatment for this illness.
Another study from 2015?found that guava leaf extract helped control diarrhea in chickens with?Escherichia coli?infections.
However, scientists need to carry out more research to confirm these findings in humans.
Drinking guava leaf tea may help people fight off the?flu.
In a?2012 test tube study, guava leaf tea showed promise as an antiviral agent for flu treatment. The researchers found that the tea inhibited the growth of the virus that causes the flu.
The antiviral effect of the tea may result from the leaf?s flavanols, which are a natural?antioxidant.
Confirming the effects in humans will require further research.
Guava is a traditional remedy for a number of ailments.
Preliminary research suggests that compounds in guava leaf extract may have a positive effect on a range of illnesses and symptoms, including menstrual cramps, diarrhea, the flu, type 2 diabetes, and cancer.
However, scientists need to carry out further studies in humans to confirm and better understand these findings.