Our skin is often overlooked, regarded as merely a barrier. Yet, beneath this complex facade lies a ecosystem teeming with life. Every layer of skin, from the outermost epidermis to the interior dermis, houses 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