Pure Grape Seed Extract

Pure Grape Seed Extract Supplier:

Guanjie, as a grape bulk extract powder supplier for 20 years. It is from the seeds of the grape, which is a dark purple powder with a high concentration of 95%. The active ingredient in this extract is Proanthocyanidins (OPC), and the extract is tested using the UV method. With an annual output of 50 tons, this high-quality grape extract powder of Guanjie is an excellent source of natural antioxidants and has excellent applications in various industries such as the food, beverage, and dietary supplements.

Why Choose Guanjie?

● Owns independent factories and labs.

● Offers third-party testing services.

● Possesses 20 years of experience in the field.

● Boasts strong collaborations with prestigious entities, such as Northwestern University and the Chinese Academy of Sciences research center.

Product Introduction:

Pure grape extract powder is a highly concentrated and pure form of extracts obtained from grape seeds and skin. This natural supplement is a rich source of powerful phytochemicals, including flavonoids, resveratrol, and anthocyanins, which are known to possess numerous health benefits. Pure grape extract powder is often used as an antioxidant, anti-inflammatory agent, and it may also help promote cardiovascular health, reduce the risk of chronic diseases, and support immune function. It is commonly available in supplement form and can be taken orally as a powder capsule or mixed with water or juice as a powder.

COA:

MOA

1. Reagent methanol

n-Butanol hydrochloric acid solution: Dissolve 5.0 ml of concentrated hydrochloric acid in 95.0 ml of n-butanol, mix well, and store in a cool place.

Ferric ammonium sulfate hydrochloric acid solution: Weigh 2.0 g of NH4Fe(SO4)2.12H2O and dissolve it in 100 ml of 2.0 mol/L hydrochloric acid aqueous solution.

2.  instruments

UV-visible spectrophotometer

3. Working solution preparation

4. Sample solution to be tested: Weigh 25.0 mg of the sample to be tested, dissolve in methanol and dilute to 250 ml.

5. Determination steps:

In a series of 10 ml stoppered borosilicate scale test tubes, add 0.2 ml of ferric ammonium sulfate hydrochloric acid solution, 6.0 ml of n-butanol hydrochloric acid solution, and then add 1 ml of the sample solution to be tested, 1 ml of methanol (blank) , three test tubes were repeated for each treatment. Stoppered and vortexed to mix.

React in a boiling water bath (be careful to ensure boiling water bath) for 40 minutes, take out, quickly cool to room temperature, and record the final volume of the solution in the test tube.

The absorbance relative to the blank was measured with a UV spectrophotometer at 546 nm.

6. Calculation

The percentage of Pure Grape Seed Extract is calculated according to the formula:

Percentage content of proanthocyanidins=A×V/(0.01389×0.366×7.2×100M)×100%

where:

A is the absorbance of the sample to be tested;

M is the weighed amount of the sample to be tested (mg);

The final volume of liquid in the V-tube (ml).

Nutritional Composition:

Generally, Pure Grape Seed Extract is high in antioxidants, particularly polyphenols like resveratrol, flavonoids, and anthocyanins. It also contains vitamins and minerals, such as vitamin C, vitamin K, copper, and potassium.

Factory&Team：

Certification

Package & Shipment

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