Maltitol

Maltitol is a sugar alcohol (polyol) derived from maltose, a naturally occurring disaccharide. In skincare, it functions primarily as a humectant—a moisture-binding ingredient that attracts water from the environment and deeper skin layers to the surface.Beyond hydration, maltitol also serves a masking function in formulations, helping to neutralise unpleasant odours from other ingredients. It's classified as a skin conditioner, meaning it helps improve the overall feel and appearance of the skin.

As a humectant, maltitol works by hygroscopic action—it has a chemical affinity for water molecules. When applied to the skin, it draws moisture from the air and from the deeper layers of the epidermis, binding it to the surface. This increases skin hydration and can temporarily improve the appearance of fine lines and dullness.Its masking function operates through odour absorption, helping formulations smell more pleasant without the need for additional fragrance or masking agents.

Maltitol is typically used as a supporting ingredient in formulations rather than a primary active, so application frequency depends on the product type. Use as directed on the specific product label—generally daily for hydrating serums or moisturisers. For best results, apply to damp skin to maximise the humectant effect, and follow with an occlusive product if skin is very dry.

Maltitol is generally well-tolerated and considered safe for topical skincare use. It is unlikely to cause irritation in most skin types, though those with severe sensitivity should patch-test first.