Retinol and hyaluronic acid do two different things. Retinol encourages cell turnover, which stimulates collagen and elastin production [source]. And hyaluronic acid absorbs moisture into the skin, plumping fine lines and wrinkles. Both are important nutrients we need to replenish as we age. And both can help make skin appear younger and firmer. Because they do different things, there’s no need to choose one over the other. Alternating between retinol and hyaluronic acid can make aging skin appear healthier and more vibrant.