Where does the grape seed extract in the OPC-3 come from?
Grape seed extract comes from two companies in the USA and Europe. You can imagine that anywhere there are grapes there will be proanthocyanidin/bioflavonoid extraction facility. Due to the proprietary nature of our business, the names of the companies cannot be given out; however, we have found them to be reputable and have found that they have significant quality control procedures in place. The extraction process is different from the process used by the Pycnogenol producers, Horphag Ltd. The process involves isolating, drying and powdering grape seeds; extracting the proanthocyanidins using a combination of pressurized hot water, butanol and acetone; concentrating and drying the compounds. The specific variety of grape is not known, but it is likely that a spectrum of red grape varieties is used for extraction. Remember that it is the extraction process that is selective for flavonoide and can be used on material from a variety of plant sources (pine bark, bilberries, citrus rinds)
