Banaba is a popular medicine plant and is used in treatment of diabetes mellitus. It is high in corosolic acid which is used in many treatments for diabetes. It is a natural plant insulin, can be taken orally, and has no side effects, according to Japanese research.
There has been much research done on Banaba leaves and their ability to reduce blood sugar, and its "insulin-like principle."
Active ingredients that are found in Banaba are corsolic acid and tannins, including lagerstroemin. These ingredients are thought to stimulate glucose uptake and have insulin-like activity. The latter activity is thought to be secondary to activation of the insulin receptor tyrosine kinase or the inhibition of tyrosine phosphatase.
Banaba is a variety of crepe myrtle that grows in the Philippines, India, Malaysia and Australia. It is a deciduous, tropical, flowering tree that can grow to 18 m in height, with a 9 to 12 m spread. The large, oblong, dark-green, leathery leaves measure 5 to 10 cm wide by 12 to 30 cm long. The leaves turn an orange-red color in the fall. The flowers are pink to purple in color, giving way to oval, nut-like fruits. The bark of the tree is thin, mottled, and peeling.
In Japan, Banaba tea has become quite popular. In the US, many weight-loss formulas are now using banaba as a safe, natural component for reducing weight. Information regarding long-term human use is not available.
No adverse effects have been reported with its use.
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