What Is a Humectant?
What Is a Humectant? — an ingredient that attracts and binds water, drawing moisture into the upper layers of skin to keep it hydrated. Common humectants include hyaluronic acid, glycerin, urea and panthenol.
Key points
- Humectants pull water from the environment and deeper skin layers into the surface.
- In very dry air they work best sealed with an occlusive or moisturiser to prevent water escaping.
- They suit most skin types and are a core part of lightweight hydration.
- Glycerin and hyaluronic acid are among the most widely used and well-tolerated examples.
Frequently asked
What does a humectant do?
It draws water into the outer layers of skin to hydrate it. Humectants like glycerin and hyaluronic acid are the reason many serums feel instantly plumping.
Do humectants work in dry climates?
They can, but in very dry air they may pull water from deeper skin unless you layer a moisturiser or occlusive on top to lock hydration in.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
