Skin aging is a complex process involving both internal (chronological aging) and external (biological aging) factors. Slowing down the proliferative and immune processes in the epidermis. reducing the activity of fibroblasts and vascularization of the dermis during chronological aging lead to thinning. dryness. https://www.roneverhart.com/API-1608-II-Recording-and-Mixing-Console-p17720/