Anti-aging serums also emphasise enhancing cell renewal, cell repair, and higher cell turnover. This promotes skin renewal and generally improves the appearance and texture of the skin. Retinol, a vitamin A derivative, is a popular and well-known substance for its potent anti-aging properties. It promotes cell turnover, boosts the formation of collagen and elastin, stops the loss of collagen, firms, and hydrates or fluff up the skin.