Sophora Japonica Extract | Quercetin 95% HPLC | Shaanxi Huaze

Sophora Japonica Extract — ≥95% quercetin by HPLC from Sophora japonica flower buds. Yellow fine powder; 80%–98% specs available. Used in capsules and tablets for antioxidant, immune, and respiratory health. Pairs well with vitamin C and bromelain. 25 kg drums. Free sample and COA. OEM supported.

Appearance

Yellow,fine powder

Specification

Quercetin ≥95%

Test Method

HPLC

Free Sample

30g

Standard Packaging

25kg / Fiber Drum

Lead Time

1-3 working days

OEM&PrivateLabelServices

Capsules,tablets,softgel,gummies,small bags,private label

Compliance

Gluten free,no Allergen,Non-GMO,No Colors, BSE/TESE Free,Vegan

Other Specs

Quercetin ≥80% · 85% · 90% · 98%

Sophora japonica L. Flower Bud Extract Powder
Quercetin ≥95% | HPLC | Fine Yellow Powder

What It Is

Extracted from Sophora japonica L. flower buds and standardized to ≥95% quercetin by HPLC. A fine yellow powder, supplied in 25 kg fiber drums with a standard lead time of 1–3 working days. Free 30 g samples are available for qualified buyers — test it in your formula before you commit.

Core Benefits

Vascular health. Quercetin inhibits hyaluronidase — the enzyme that breaks down capillary walls — helping preserve blood vessel integrity and circulatory function. A foundational ingredient for vein-health and leg-comfort formulations.
Capillary support. By reinforcing the endothelial basement membrane, quercetin strengthens capillary walls against fragility. The go-to botanical for products targeting bruising tendency, skin microcirculation, and vascular resilience.
Antioxidant defense. As a flavonol, quercetin works through dual pathways — neutralizing reactive oxygen species while chelating transition metal ions. Broad-spectrum protection for immune health, healthy aging, and daily wellness.
Seasonal and respiratory comfort. Quercetin stabilizes mast cell membranes, securing its place in seasonal-wellness formulations globally.

Application Areas

Dietary supplements — standalone quercetin capsules or synergistic blends with vitamin C and bromelain
OEM capsule programs — private-label capsules with flexible potency, bottle count, and labeling, managed end-to-end
Functional foods — fortified beverages, powdered drink sticks, and wellness shots
Cosmeceuticals — ingestible and topical formulations targeting skin clarity and microvascular health

Why Source from Huaze

Commercial-scale extraction. In-house HPLC release testing on every batch. ISO 9001, Kosher, and Halal certified. Whether you are formulating with bulk powder or need finished OEM capsules under your brand, we deliver — on spec, on time, without the back-and-forth.

Request your free 30 g sample today — and see how a ≥95% quercetin extract performs in your formula.Please contact us at sales@zeingredients.com

Appearance

Yellow,fine powder

Specification

Quercetin ≥95%

Test Method

HPLC

Free Sample

30g

Standard Packaging

25kg / Fiber Drum

Lead Time

1-3 working days

OEM&PrivateLabelServices

Capsules,tablets,softgel,gummies,small bags,private label

Compliance

Gluten free,no Allergen,Non-GMO,No Colors, BSE/TESE Free,Vegan

Other Specs

Quercetin ≥80% · 85% · 90% · 98%

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Company Overview

Factory Show

Macroporous Resin Adsorption Column for Plant Extract Purification
Adsorption Column
Multi-functional Extraction Tank – Production Equipment
Extraction Adsorption Concentration
Finished Goods Warehouse-Huaze Biotech
Finished Goods Warehouse

FAQ

What botanical extracts do you offer?

Our portfolio spans standardized botanical extracts and naturally derived active compounds at every scale. That includes branded ingredients with proven bioavailability, and tailored OEM/ODM solutions — think custom premixes, stick-pack blends, and ready-to-mix solid beverages.

We’re a manufacturer. Our extraction and formulation facility occupies 4 hectares (60 Mu) in Shaanxi’s Yangling Agricultural Demonstration Zone, operating under ISO 9001 quality management with Kosher and Halal certification. Every batch is produced, tested, and released on-site — we don’t outsource production or skip release testing.We prioritize locally sourced raw materials and partner exclusively with GACP-compliant growers. This gives us full traceability from field to finished product and supports biodiversity conservation. Every batch is identity-verified, purity-tested, and checked for batch-to-batch consistency before release.

Yes. We know that in-house validation is a critical step in your R&D process. We typically supply 30 g of product at no charge for evaluation purposes. While the sample itself is free, we ask that you cover the international shipping cost — which is fully creditable against your first bulk purchase order.