Hordeum vulgare (Barley) Extract is an extract of the cereal grass of the barley, Hordeum vulgare. Barely and its extracts are a popular source of gluten. In natural skin care barley extract is known for its reputed antioxidant and skin-conditioning properties. It is known to soothe and moisturise skin, and helping to promote the replenishment of the skins protective barrier.