How to identify grape seed extract proanthocyanidins

Aug 22, 2018

Grape seed extract proanthocyanidin is a natural antioxidant that cannot be synthesized in human body.Proanthocyanidins have a strong anti-aging effect and enhance immunity. This product has been widely used in the health care products, medicine, and cosmetics industries.

High Quality Grape Seed Proanthocyanidin Extract, Proanthocyanidin Powder

Grape seed extract basic information

Source
 The extract of the seeds from the dried residue after the ripening of the grapes of the grape family.
Product Specifications
Proanthocyanidins ≥95%, oligomeric proanthocyanidins ≥85%,Polyphenol ≥(70% ,80%,85% ,90%,95%)
Test method
 HPLC, UV
Appearance
reddish brown fine powder.
product chemical composition

Proanthocyanidins,Oligomeric proanthocyanidins,Total polyphenols,Total flavonoids

grape seed extract.jpg

In the current market, many proanthocyanidins sold by grape seeds are mixed or directly pre-exposed with peanut extracts proanthocyanidins. How to identify grape seed extracts has always been a matter of great concern to many companies.

Firstly, the proanthocyanidins of grape seed source are mainly B-type proanthocyanidins, mainly proanthocyanidin B2, while the peanut dressing source is mainly type A (A-type) proanthocyanidins, mainly proanthocyanidin A2. Therefore, the content of proanthocyanidin A2 can be detected by liquid chromatography to determine whether it is a grape seed-derived proanthocyanidin.

Secondly, from the smell of the product, the grape seed smell is relatively light, and the peanut clothing or pine bark source smells heavier, but this method is subjective and difficult to judge.




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