Question: what is the difference between collagen and hyaluronic acid?
Answer: Don't they do the same thing? A: Collagen and hyaluronic acid are the key components of healthy, youthful skin (as well as joints). ... Hyaluronic acid is an essential component of the skin because of its ability to promote collagen. Collagen firms the skin while hyaluronic acid nourishes and hydrates the collagen.