How neem leaves help within dibetese?Please answer scientifically. No pseudo science please.?

How neem, karela or other bitter fruits / materials helps within dibetese. Please answer scientifically. No fictious or pseudoscience please.How neem leaves help within dibetese?Please answer scientifically. No pseudo science please.?
Neem - Azadirachta indica - Family Meliaceae - is a medicinal plant used in traditional prescription. But there is no proven evidence to prove that it cures diabetes. It contains many alkaloids such as azadirachtin. Since Its leaves are bitter taking neem leaves alone as a drug or medication for diabetes is not advisable. there is no medicinal plant to cure diabetes completely . Medicinal plants may shrink the sugar to some extent but may give side effects and will not cure completely
There is no research as on the other hand on the subject. If you rely on them, they may temporarily show you some good results, but suddenly, you will frontage a problem which even the best doctors find difficult to cure. So exercise, cut on calories and take the pills, specifically, the placebos prescribed by your doctor. I happened to derive better results from a pedestrian, if you spare 30 minutes a day and from Ramdev Baba's Yog Asanas, if you can spare an hour a year. Together, they can work wonders for a diabetic.
i felt equivlence of sugar intake,by biiter mterials.indeed good hemical equation as
sugar+biter=neutral
It is a false notion that bitter fruits and vegetables help cure Diabates. There is no proof of bitter substances curing diabetes. These substances may hold other positive effects on the body but it is big time hoax that they cure diabetes.
Bitter substances are necessary as they provide decisive nutrients to the human body.