MEDIHEAL Collagen Firming Volume Serum + Retinol 40ml: Industrial-Grade Structural Lifting Engine & High-Torque Cellular Resurfacing System – 3X Density Collagen-Matrix for Sag-Resistance & Precision Fine-Line EradicationLift and re energize slack skin with a concentrated firming serum powered by 98% pure collagen, retinol, and squalane. This silky formula boosts elasticity, smooths uneven texture, and restores a healthy glow for skin that looks visibly firmer and more radiant in just 5 days. Firming and lifting: Supports elasticity to reduce the look of sagging and fine lines. Texture smoothing: Refines roughness for a softer, more even surface. Radiance boost: