Hyaluronic acid is a natural agent found in the epidermis layer of the skin. It plays a vital role in preserving the skin's tone and elasticity, but also maintaining this famous hydration: it's the main reason why younger skin is naturally plump, full and smooth. As time ticks on, starting in your twenties, its presence in the body gradually decreases, notably because of the free radicals (sunlight, pollution …) that we're exposed to. Beauty products are definitely on the right track by introducing hyaluronic acid as one of their properties, since, thanks to its unique structure, it can hold on to water molecules, helping to hydrate the skin. It works a bit like a sponge, soaking up to 1000 times its weight in water! As it's neither fatty nor occlusive, it is also a great alternative for problematic younger skin that needs hydration but without the side-effect of spots. Hyaluronic acid is, therefore, great for facial moisturising and is perfect for any dehydrated or lacklustre skin that wants to get ready to take on winter.