| Summary: | Mushrooms are edible fungi containing valuable nutrients. They provide attractive bio-active properties, which have confirmed anti-oxidants, anti-aging, and anti-inflammatory properties. Mushrooms possess abundant natural polymers affecting skin hydration and acting as moisturizers supporting skin barrier function. In this study, cloud ear mushroom (<i>Auricularia polytricha</i>) water extract (CW) was produced as a natural polymer to evaluate a new film-forming spray (FFS) containing CW to increase skin hydration and protect transepidermal water loss. CW contained polysaccharides as 748.2 ± 0.02 mg glucose/g extract. CW significantly inhibited the secretion of IL-6 and TNF-α and enhanced skin hydration by increasing aquaporin-3 (AQP3) and filaggrin (FLG) in HaCaT cells. The FFS was formulated using CW, sodium polystyrene sulfonate, and glycerin. The selected formulation contained brown <i>Agaricus bisporus</i> (BE-FFS) evaluated physical appearance, spray angle, spray pattern, and in vitro skin permeation. The BE-FFS has a transparent thin film with suitable occlusive properties, drying time, and physical appearance. Afterward, in vitro skin permeation and human hydration property studies presented the long-lasting effects and provided safety and hydration potential after 4 weeks of use. Overall, all results indicate that the BE-FFS is a natural film-forming spray for skin hydration improvement.
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