An OPC product only has the highest quality if the recipe and the manufacturing method comes personally from Professor Masquelier and the entire production process was mentored by him. These are the true and only premium products that achieve the therapeutic results that underlie the works of Professor Masquelier.
The effectiveness of OPC depends on its high bioavailability. Bioavailability describes the rate in how quick the OPC agent is absorbed by the body and how much the body takes in from the ingested OPC.
There's a simple rule for that: The shorter the chain of the OPCs (oligomeric proanthocyanidins) the higher is the bioavailability and the stronger is the effectiveness of the OPC product.
The patented original manufacturing process of Professor Masquelier guarantees that an OPC product has a high degree of short-chained OPCs (dimeric to pentameric, which means two-parted or six-parted chains). Only this makes the high efficacy possible in the first place. Only a high amount of short-chained OPCs can create the therapeutic success of grape seep or pine bark extracts.
OPC extracts that were not produced according to the patented method of Professor Masquelier can highly differ from the features of the original and are not recommended due to varying molecule lengths.