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Grape seed extract as follows: 1. Grape seed polyphenols:
a. 95% by UV, folin assay
b. 95% polyphenols with 15% phenolic monomers including catechin, epicatechin, ECG, etc. by UV, folin assay and HPLC
c. 90% by UV, folin assay
d. 90% polyphenols with 10% phenolic monomers including Catechin, epicatechin, ECG, etc. By UV, folin assay and HPLC
2. Grape seed proanthocyanidins (OPCs) 95% by UV, beta-Smith assay
Grape skin extract is derived from the skin of grapes and can be used as a supplement for anti-oxidant health products. The specifications are as follows:
1. 5% anthocyanidins
2. 25% anthocyanidins
Pine bark extract as follows:
1. 95% proanthocyanidins by UV, beta-Smith assay
2. 90% polyphenols by UV
Rutin is extract from flos sophorae lmmaturus. Its standards are as follows:
1. NF11
2. DAB9
3. DAB10
Troxerutin is DAB1999.
Quercetin: 95 - 102%
Dihydroquercetin: 90 - 95%
L(+)-rhamnose: 98%
We can also supply flos sophorae lmmaturus. It is
