Hydration Science
It's not just what you apply — it's what your skin can hold
Hydration is governed by movement and retention. Water is constantly shifting in and out of the skin, influenced by environment, barrier integrity, and the products we use.
Without proper retention, even the most hydrating products can evaporate quickly — leaving the skin feeling just as dry, or even drier than before.
Drawing water in
Humectants like hyaluronic acid and glycerin attract water into the skin, helping to increase surface hydration and suppleness.
Holding it in
Lipids and barrier-supportive ingredients help reduce water loss, allowing hydration to stay where it is needed longer.
Keeping equilibrium
True hydration is not excess — it is balance. Skin that is properly hydrated regulates itself more efficiently.
Why hydration fails
Often, hydration routines focus only on adding moisture — without addressing retention. This leads to a cycle where the skin never fully stabilizes.
Climate, cleansing habits, and product layering all influence how hydration behaves in the skin.
The ingredients behind the hydration cycle
Each stage of the hydration cycle has a corresponding ingredient category — attraction, retention, and sealing all work together.
Continue exploring Skin Science
Explore the full Core Topics library, dive deeper into the ingredients behind hydration, or let Luna help guide you toward the right routine.
