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Antioxidant Grape Seed Extract Supplement Polyphenol 70%

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Antioxidant Grape Seed Extract Supplement Polyphenol 70%

Antioxidant Grape Seed Extract Supplement Polyphenol 70%
Antioxidant Grape Seed Extract Supplement Polyphenol 70%

Large Image :  Antioxidant Grape Seed Extract Supplement Polyphenol 70%

Product Details:
Place of Origin: China
Brand Name: BNP
Model Number: Polyphenol 70%-95%
Payment & Shipping Terms:
Minimum Order Quantity: 1kg
Price: USD12-19/KG
Packaging Details: 25kg/drum
Delivery Time: 3-5DAYS
Payment Terms: L/C, D/A, D/P, T/T, Western Union
Supply Ability: 1000000KGS PER YEAR

Antioxidant Grape Seed Extract Supplement Polyphenol 70%

Product Name: Grape Seed Extract Latin Name: Sambucus Nigra L.
Ingredients: Polyphenol 70%-95% Part Used: Seed
Color: Red-Brown Shelf Life: 24 Months
Test Method: HPLC/UV Application: Health Care Supplement
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Product Name

Latin Name


Grape Seed Extract

Sambucus nigra L.

Proanthocyanidins 95%

Polyphenol 70-95%


What is Grape Seed Extract?


Grape seed extract is a class of polyphenols extracted and isolated from grape seeds, mainly composed of proanthocyanidins, catechins, epicatechin, gallic acid, epigallocatechin gallate, and other polyphenolic substances.

Grape seed extract is a substance extracted from the common wine grape (Vitis vinifera). This extract is usually sold as a supplement and it comes in different forms such as liquid, tablets, or capsules.


Recently published research has brought grape seed extract to fame overnight. Evidence suggests that grape seed extract contains antioxidants and a variety of other compounds that are beneficial in improving your health.



1. Anti-bacterial

2. Anti-viral

3. Anti-cancer

4. Anti-inflammatory

5. Anti-allergic

6. Vasodilatory effect




1. Drug development
2. Cosmetic development
3. Health product development


Test Method:


HPLC method

This method determines the content of each monomer, oligomer, and homopolymer in the extract. However, due to the limitations of the control and the analytical means, only the content of monomers and some oligomers in grape seed extracts can be determined. In practice, it is sufficient to determine the content of only those monomers. The main monomers in grape seed extracts are catechin, epicatechin, gallic acid, and epicatechin gallate. [5]

The content of monomers in grape seed extracts is generally around 10.0% and can reach up to 30.0%. Due to the complexity of grape seed extract components, it is generally difficult to completely separate multiple monomers by the HPLC method if the sample is not pretreated. Therefore, the extracts need to be pretreated to remove the polymers and improve the monomer content before injection. Commonly used pretreatment methods are silica gel column chromatography, SephadexLH- 20, Sephadex G25, Toyopeah TSK HW40, and other column chromatography methods. The sample can also be pretreated by thin-layer chromatography, generally using toluene: acetone: acetic acid = 3 : 3: 1 (V/V/V) as the unfolding agent.




1. Who are we?
We are based in Qingdao, China, start from 2004,sell to Domestic Market(27.00%),North America(25.00%),Northern Europe(20.00%),South America(18.00%),Western Europe(10.00%). There are a total of about 51-100 people in our office.

2. How can we guarantee the quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3. What can you buy from us?
We are main Resveratrol, Polygonum Cuspidatum Extract, Emodin, Physcion, Polydatin

4. Why should you buy from us, not from other suppliers?
1. The experienced senior engineering and technical experts for R&D 2. The first-class production equipment with the latest technology and testing methods. 3.A massive and integrated production chain which combined with a plantation, Scientific R&D, production

5. what services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW,DDU,Express Delivery;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,Credit Card,PayPal,Western Union;
Language Spoken:English,Chinese


Contact Details
Qingdao BNP BioScience Co., Ltd.

Contact Person: Grace

Tel: 86-15805413191

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