- Pure extract from the flowers of the Japanese pagoda tree (Sophora japonica)
- Standardised to at least 95% quercetin
- 100% natural, plant-based quercetin
- Full 500mg per capsule
- Highly pure extract via water and ethanol, without any other solvents
- No additives and vegan
Quercetin 500
Premium Quercetin, providing a full 500mg per capsule, derived from a natural, pure botanical extract from the blossoms of the Japanese pagoda tree (Sophora japonica). This extract is standardised to at least 95% quercetin and is obtained via a special and gentle water-ethanol extraction. Produced without genetic engineering, the formula is fructose-free, vegan and free from unnecessary additives. 120 capsules
- 100% natural plant-based quercetin
- From pure flower extract of the Japanese cordwood Sophora japonica
- At least 95% quercetin in the extract
- Full 500 mg per capsule
- Highly purified water-ethanol extract, without any other solvents
- No additives and vegan
How are we different?
We use a 100% natural, purely herbal extract from the flowers of the Japanese cord tree (Sophora japonica). This is standardised to at least 95% quercetin content and contains no synthetic quercetin, which has low bioavailability. The pure water-ethanol extraction process eliminates the use of other extraction agents, such as N-hexane or methanol.
For the capsule shells we use custom-made HPMC capsules that, unlike most other HPMC and pullulan capsules on the market, are 100% free from controversial additives such as carrageenans and PEG. We then package this product in environmentally friendly amber glass.
Our commitment to uncompromising quality & purity:
- Premium active ingredients as pure isolates & directly sourced from leading global producers
- All formulations crafted exclusively from selected individual raw materials
- Our commitment: zero unnecessary additives, technical excipients or chemical extraction agents
- Voluntary declaration of all non-mandatory ingredients
- Where additives are necessary, preference is given to valuable natural ingredients
- Capsule shells 100% free from carrageenan & PEG
- Systematic quality testing conducted by independent laboratories
- Packaged in amber glass or premium aroma-protective zipper bags designed to protect against oxidation & contaminants
- All products 100% free from: magnesium stearate, nanoparticles (without legal exceptions), GMOs, artificial colours & flavours, titanium dioxide
- Added sugar & sweeteners: used only where required for functional or product-specific reasons
Effects
Bioflavonoids, a class of plant compounds which includes quercetin, are the most abundant polyphenols (aromatic compounds) in the plant kingdom. As plant pigments, they are responsible for both the colouring of flowers and leaves as well as for protecting the plants against environmental damage.
Quercetin is particularly concentrated in the outer layers of plants and fruits in order to protect them. Foods rich in quercetin include grapes, apples and onions. Removing the skins or shells of such fruits and vegetables, however, effectively strips these foods of their quercetin. The name of this potent flavonoid is derived from the Latin "quercus" (oak) due to the high concentrations of the potent flavonoid discovered in the tree's bark. However, it is not only oak trees that are rich in quercetin; the bark and outer layers of other trees also contain large quantities of this antioxidative compound.
The Japanese pagoda tree (Sophora japonica), from whose flowers we extract our 100% natural and bioavailable quercetin, contains exceptionally high amounts.
Dosage
Recommended Dosage
Take 1 capsule (500mg quercetin) with 200ml water daily.
Food Supplement
Do not exceed the recommended dose. Food supplements cannot replace a balanced and varied diet. Keep out of reach of children.
Storage
Store in a cool, dry place away from direct sunlight and heat.
Contents
Ingredients: Sophora Japonica Extract, Capsule Shell (Hydroxypropyl Methylcellulose).
Contains: 120 capsules
| Nutrition Information per Capsule | %NRV* | |
| Sophora japonica Extract | 526mg | ** |
| of which quercetin | 500mg | ** |
* Nutrient Reference Value
** no NRV established
Per capsule: 526mg Sophora japonica extract, of which 500mg quercetin
Per jar: 63.12g Sophora japonica extract, of which 60g quercetin
Product Details
| Production | Bottling and encapsulation in the EU according to HACCP, GMP and ISO 22000:2018 standards. In-house capsule production in Europe. High-quality custom production of liquid products and (functional) foods for sports and everyday use. Production of tablets by selected partners according to HACCP / GMP standards. Storage in amber glass or product-specific, food-safe containers according to EC 10/2011. Shipping boxes made from safe, sustainable materials. |
| Capsules | Plant-based cellulose (HPMC). Vegan Premium HPMC quality: Free from controversial additives such as carrageenans and PEG |
| Packaging | Amber glass jar to protect against light and oxidation (free from plasticisers and BPA) |
| To Reuse | Remove product label by soaking the jar in warm water for 5 minutes. Glue residue can be removed with dish soap. |
Laboratory Tests
The purity of our formulas is important to us. This is why we have both our raw ingredients as well as our finished products extensively tested by independent laboratories to confirm purity and active ingredient content. Here, we have provided the results of some of the tests carried out on this product.
Sunday Natural
Our philosophy
For thousands of years, cultures all over the world have been using a variety of plants and nutritious foods to naturally foster vitality and good health.
With our products, we try to emulate this ancient wisdom as much as possible.
Consequently, our philosophy is simple: we strive to meet the highest standards of quality and purity in every product we produce, with a focus on organic and natural ingredients.
We follow this philosophy with meticulous care on all levels, down to every last detail.




