Problem to be solved: To provide a new skin humectant. A novel skin barrier function-improving agent is also provided. Solution: a skin humectant contains, as an active ingredient, 1 or more salmon derived matter selected from the group consisting of salmon juice, salmon juice dry matter, and salmon fruit dry matter. Also provided is a skin barrier function-improving agent characterized by containing, as an active ingredient, 1 or more salmon derived material selected from the group consisting of salmon juice, salmon juice dried product, and salmon fruit dried product. Selected drawing: None
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