Banaba (corosolic acid) バナバ（コロソリン酸）
A compound found in the leaves of banaba (Lagerstroemia speciosa).
In Japan: Foods with Function Claims notifications
Functions claimed (counted from notifications with this ingredient alone)
| Function | Notifications |
|---|---|
| Fasting blood sugar | |
| Walking ability and exercise | |
| Knees, lower back, and joints | |
| Muscles |
Examples of notified claims (our translation)
This product contains banaba leaf-derived corosolic acid. Banaba leaf-derived corosolic acid has been reported to have the function of lowering high fasting blood sugar in healthy people and the function of suppressing the rise in blood sugar after meals.
This product contains banaba leaf-derived corosolic acid. When combined with light daily exercise, banaba leaf-derived corosolic acid has been reported to have the following functions: helping suppress the decline in muscle mass that occurs with age in middle-aged and older people; helping improve walking ability; reducing knee discomfort when standing up from or sitting down on a chair; reducing temporary strain on the lower back and shoulders; and helping reduce belly fat (visceral fat) in people who are somewhat overweight.
This product contains Lagerstroemia speciosa leaf-derived corosolic acid. When combined with light daily exercise, Lagerstroemia speciosa leaf-derived corosolic acid has been reported to have the function of helping improve walking ability that declines with age in middle-aged and older people, the function of reducing knee discomfort when standing up from or sitting down on a chair, and the function of reducing temporary strain on the lower back and shoulders.
Cautions written in the notifications (most common)
- “If you are taking medication for diabetes or antihypertensives, consult your doctor or pharmacist.” (3 notifications)
- “If you are taking medication for diabetes or blood pressure-lowering drugs, consult your doctor or pharmacist.” (3 notifications)
- “Avoid taking too much (depending on your constitution or physical condition, it may not agree with you).” (5 notifications)
Under Foods with Function Claims, the company notifies the Consumer Affairs Agency of the scientific evidence on its own responsibility; the government does not review or approve it. You can look up each product's notification by the number on the package in the Consumer Affairs Agency's database (Japanese).
In the EU: the register of health claims
No claim in the EU register
- The EU register of health claims has no claim for this ingredient. In the EU, the review of many plant-based claims (about 2,000) remains on hold, and those claims are not listed in the register.
In the EU, only health claims whose evidence has been assessed by the European Food Safety Authority (EFSA) and authorised by the European Commission may be used on food. “Not authorised” means the evidence for that claim was not established under EU standards — not that the ingredient is dangerous.
Find products PR
These are Japanese online shops (affiliate links).
Example of a product notified with this ingredient
血糖サポート （株式会社ファンケル）
Food with Function Claims, notification No. D236. Chosen from products sold on Rakuten whose names match a current notification to the Consumer Affairs Agency, picking one with many reviews.
See on Rakuten (fancl-shop)See on Amazon.co.jpThis database does not guarantee any product's effect. For Foods with Function Claims, check the notification number on the package; for Foods with Nutrient Function Claims, check the amount per daily serving.
Compare “バナバ サプリ” products on RakutenCompare “バナバ サプリ” products on Amazon.co.jpOther ingredients in the same categories
This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.