Proanthocyanidins can be divided into two types: oligomeric proanthocyanidins and high polymeric proanthocyanidins.
Dimer to tetramer are oligomeric proanthocyanidins, known as OPC.And pentamer to decamer are highly polymerized proanthocyanidins, known as PPC.
Oligomeric proanthocyanidins have excellent water solubility and are the most powerful antioxidants with 100% bioavailability.
High polymer proanthocyanidins are almost insoluble in water and have almost no antioxidant effect.
The content of proanthocyanidins in grape seeds was the highest, up to 95%.High quality grape seed proanthocyanidins are brown red powder.
If the color is shallow or the soil brown appears, it indicates that the content of proanthocyanidins is low, or the pharmaceutical excipients are added to the spray drying process.
High quality proanthocyanidins are transparent wine red.Some use grape seed powder as grape seed proanthocyanidins.Grape seed powder is brown and coarse and its cost is lower.
The above is a simple way to judge.
Free samples can be supplied.
#95OPC #95Proanthocyanidins
