Leontopodium Alpinum (Edelweiss) Extract Best Antioxidant Soothing Leontopodium Alpinum (Edelweiss) Extract opis Edelweiss is a plant extract whose constituents are capable of providing antioxidant and skin-soothing benefit for skin. Edelweiss contains lignans, one of the constituents that have a natural skin-calming benefit. Edelweiss also contains a compound known as leontopodic acid, which research has shown strengthens skin’s barrier and helps reduce signs of sensitivity. In doing so, it helps skin’s surface become more resistant to environmental aggressors, including some types of airborne pollutants.