A new study reveals the inhibiting effect chios mastic gum has against specific enzymes, which play a role in degrading proteins contained within skin connective tissue. Its findings may be applied to new cosmetic formulations. As the resin of the mastic tree (Pistacia lentiscus var. Chia), chios mastic gum is a product with a history of use as a natural chewing gum and for relieving abdominal discomfort, pain and inflammation.