Pullulan is a film former and binder popular in the production of breath strips, but it also appears as an ingredient in cosmetics and beauty products because of its solubility in water, and adhesive properties. According to Wikipedia, it is produced from the starch of the fungus Aureobasidium pullulans, and CosmeticsCop.com says that it is "Glucan gum produced by black yeast that contains polysaccharides, which makes it a good water-binding agent, thickening agent, and antioxidant," although no other information corroborates any antioxidant properties or benefits.
It is able to quickly form a sheer film that temporarily improves skin's texture and appearance. According to Hayashibara, a Japanese manufacturer of Pullulan, it also provides a smoother texture to formulas, provides foam retention, is anti-static and oil resistant, and water soluble and therefore easily rinsed away.
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