If you want firmer, smoother, more youthful-looking skin, you need to start a collagen-supporting routine. Don’t just take my word for it! Your skin is literally made up of the precious protein, but your levels start to decline at a steady rate of 1% per year1 once you hit your mid-20s. As a result, you may start to see signs of skin aging, like fine lines, sagging, sallowness, and loss of volume.Â