Proanthocyanidin (PAC), a kind of Polyphenol, is contained in plants, especially in fruits, wheat and beans and it is a main ingredient of Polyphenol in red wine. The lower molecular weight of PAC is especially called Oligomeric Proanthocyanidin (OPC).
Black soybeans contain a lot of OPC, which are absorbed in human bodies smoothly.


PAC has a structure composed of Catechin molecules as shown right.


PAC has several effects based on powerful antioxidant function as follows:

  1. Antiallergenic property
  2. Anticancer effect
  3. Cholesterol and Neutral fat lowering effect
  4. Anticaries effect
  5. Deodorant effect
  6. Melanin formation reducing effect
  7. Hair growth
  8. Prevention of cataract
  9. Whitening