| abstract |
The skin tissue improving material provided by the present invention comprises a culture obtained by culturing cells or tissue pieces derived from alveolar mucosa of humans or other mammals as a main component. Typically, at least 50% of the cells contained in the culture are fibroblasts, have a high rate of proliferation, and are capable of producing vascular endothelial cell growth factor (VEGF) and / or keratinocyte proliferation factor (KGF). |