Our surface is often overlooked, regarded as merely a shield. Yet, beneath this complex facade lies a ecosystem teeming with activity. Every region of skin, from the top epidermis to the interior dermis, contains a https://sites.google.com/view/collagenselec2/%D8%A7%D9%84%D8%B5%D9%81%D8%AD%D8%A9-%D8%A7%D9%84%D8%B1%D8%A6%D9%8A%D8%B3%D9%8A%D8%A9