PA2 (Proanthocyanidin A2) is a molecule present in the bark of the Horse Chestnut tree (Aesculus hippocastanum) branches. It has potent antienzymatic activity (mainly anti-elastase and anti-collagenase), is a free radical scavenger and also normalizes impaired capillary permeability and fragility.
The ingredient described is offered for consideration for use in cosmetics products. The information provided describes historical use, ingredient activity and other information that may be relevant to their use in such products. How each ingredient would contribute to a particular product would be formulation specific.