Quercetin glycosides ケルセチン配糖体
Quercetin with sugars attached (glycosides). For FOSHU, notifications are made by the amount of isoquercitrin.
In Japan: Foods with Function Claims notifications
Functions claimed (counted from notifications with this ingredient alone)
| Function | Notifications |
|---|---|
| Nasal discomfort | |
| Triglycerides | |
| Stress and tension |
Examples of notified claims (our translation)
This product contains quercetin. Quercetin has been reported to reduce nasal discomfort caused by pollen, dust and house dust, and to moderate the rise in blood triglycerides after meals by suppressing lipid absorption.
This product contains quercetin glycosides. 101 mg of quercetin glycosides has been reported to maintain a positive mood, a lively mood and motivation, which tend to decline with age in middle-aged and older people, and 303 mg of quercetin glycosides has been reported to slow the absorption of dietary fat and moderate the rise in blood triglycerides after meals.
This product contains quercetin. Quercetin has been reported to help maintain a positive mood, which tends to decline with age in healthy older people. Eating 150 g of the edible portion of this product provides 50% of the daily amount of the functional ingredient for which the function has been reported.
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 Japan: Foods for Specified Health Uses (FOSHU)
Approved claims by category: Body fat 24, Walking ability and exercise 4
Thanks to quercetin glycosides, which activate fat-breakdown enzymes, this product increases the ability to metabolize fat (breakdown and consumption of fat) through daily physical activity and helps reduce body fat, so it is suitable for people with relatively high body fat.
FOSHU products are reviewed and approved one by one by the government (Consumer Affairs Agency) for effectiveness and safety. The counts are of products whose functional ingredient matches this ingredient. Source: Consumer Affairs Agency, list of approved FOSHU products (Japanese). Claims are our translation.
In the EU: the register of health claims
Claim not authorised in the EU
- Claims for quercetin on the "heart and blood vessels," "brain" and "liver and kidneys" were not authorised because the effect was not sufficiently defined, and the "antioxidant" claim was not authorised because it was not substantiated (2011 opinions).
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 FOSHU product with this ingredient
特茶 TOKUCHA （サントリービバレッジ＆フード株式会社）
FOSHU, approval No. 1827. Chosen from products sold on Rakuten whose names match the Consumer Affairs Agency's list of approved FOSHU products (with sales in fiscal 2024), picking one with many reviews.
See on Rakuten (mashimo)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 “ケルセチン配糖体” products on RakutenCompare “ケルセチン配糖体” 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.