An object to be solved by the present invention is to provide a novel method for screening a component that inhibits fibrosis of skin tissue, a component that inhibits formation of wrinkles, slack or scar, and a component that improves viscoelasticity and/or elasticity of the skin. A novel screening method for a component that inhibits fibrosis of skin tissue, a component that inhibits formation of wrinkles, slack or scar, or a component that improves viscoelasticity and/or elasticity of the skin, using an inhibitory effect of extracellular trap formation by human neutrophils as an indicator. None

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