The Trilogy Age Proof Nutrient Plus Firming Serum is a lightweight serum that's perfect for use under your moisturizer. It's formulated with natural ingredients, including hyaluronic acid and plant proteins, to help firm and plump the skin. This serum also contains rosehip oil, which is rich in antioxidants and helps to hydrate the skin. Use it daily to help reduce the appearance of fine lines and wrinkles.