
Quercetin Capsules
95–98% aglycone. Plan a larger capsule than a rutin brief if the dose is in the same milligrams.

Quercetin from sophora flower is the aglycone, typically 95% or 98%. It is the core of rutin after the sugar is removed, and it is less soluble in water.
It is used in antioxidant and allergy-style capsules, often beside vitamin C or bromelain. Those partners are not in this powder.
When buying, set 95% or 98% by HPLC and keep the spec off the rutin code.
| Product Name | Sophora Japonica Extract Quercetin Powder | Botanical Name | Sophora japonica |
|---|---|---|---|
| Part Used | Flower bud | Specification | 95%, 98% quercetin |
| Appearance | Yellow green powder | Test Method | HPLC / UV |
| MOQ | 1kg | Active Ingredient | Quercetin |
| Shelf Life | 2 years | CAS number | 117-39-5 |
| COA | Available | Certificate | ISO 22000, FDA, BRC, IFS, SGS, Kosher, Halal, Organic (EU), USDA, HACCP, ISO 9001 |
| Quality | Non-GMO, Non-irradiation, Allergen Free, BSE/TSE Free | Sample | 10-50 g sample for evaluation |
| OEM Service | Private labeling, customized packaging, capsules and tablets | Packaging | 1-5 kg / 25 kg (aluminum foil bag / fiber drum) |

95–98% aglycone. Plan a larger capsule than a rutin brief if the dose is in the same milligrams.

A common blend, but vitamin C is added by you. It is not in the extract.

The aglycone settles. Use a dispersible grade only if one is specified.

Vitamin C or bromelain is added by you. It is not in this powder.

The aglycone settles. Do not brief a clear toner on the 98% grade.

Quercetin and rutin must not be swapped to “match flavonoids”.

The aglycone settles. Dispersible grades have to be specified.