The gel-cream hybrid is rich yet lightweight, super hydrating, and infused with (you guessed it) three different types of collagen peptides for 24-hour hydration that instantly plumps and firms the skin. That being said, "So long as it's a well-made formula, collagen cream is best used by those looking to ‘bank’ their collagen or promote new collagen production in the skin," she adds. The collagen cream, however, did make her skin look and feel more plump, giving her a healthy, hydrated glow wit...