Both serums and ampoules share a common goal: to hydrate, boost collagen and elastin, combat signs of aging, diminish dark spots, and strengthen your skin. But what sets them apart? Ampoules are typically thicker and packed with highly concentrated peptides, vitamins, and plant extracts, allowing for deeper penetration over time. They may take longer to absorb, often requiring you to wait overnight for maximum effectiveness. On the flip side, serums have a lighter formulation, absorbing quickly into the skin within seconds, making them perfect for daily use.