There is some evidence that guava can improve blood sugar control.
Several test-tube and animal studies found guava extract reduced blood sugar levels, improved long-term blood sugar control and reduced insulin resistance
This is good news for people with diabetes or those at risk.
A few studies involving humans have also shown impressive results.
One study of 19 people found that drinking guava leaf tea lowered blood sugar levels after a meal. The effects lasted for up to two hours.
Another study involving 20 people with type 2 diabetes found that drinking guava leaf tea reduced blood sugar levels after a meal by more than 10%.
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PS: Especially, red inside ones are the best and very sweet. Eat Jamphal...and be healthy!