Biosaccharide Gum-5
INCI: BIOSACCHARIDE GUM-5
Reviewed by Daisy · Last updated 14 Aug 2026
A polysaccharide humectant that draws moisture into skin and supports hydration
Best For Skin Types
All, Dry, Sensitive, Combination
Addresses
Usage Frequency
Daily
What Is Biosaccharide Gum-5?
Biosaccharide Gum-5 is a naturally-derived polysaccharide — a complex carbohydrate polymer — typically produced through fermentation or extraction from plant sources. It functions as a humectant, meaning it has the ability to absorb and retain water from the surrounding environment and bind it to the skin's surface.
In skincare formulations, it is used primarily for its skin-conditioning properties. Its film-forming behaviour allows it to create a light protective layer on the skin whilst simultaneously drawing moisture upwards into the outer layers of the epidermis, which can help maintain skin hydration and support a smoother, more supple appearance.
How It Works
Biosaccharide Gum-5 works through humectant action. Its molecular structure contains multiple hydroxyl groups that form hydrogen bonds with water molecules, effectively pulling moisture from deeper layers of the skin and the environment into the stratum corneum (the outer skin layer). This hydrates the skin and can temporarily improve skin texture and plumpness.
Additionally, the ingredient has film-forming capacity, meaning it deposits a thin, occlusive layer on the skin surface. This layer slows water evaporation whilst remaining breathable and lightweight — a property particularly valued in modern skincare where a non-greasy feel is often preferred.
Clinical Evidence & References
Published clinical data specifically on Biosaccharide Gum-5 is limited in the peer-reviewed literature. However, polysaccharide humectants as a class have a well-established track record in skincare. Their hydrating and film-forming properties are recognised across dermatological and cosmetic chemistry research, and they are generally considered safe and effective for moisture-binding applications.
The ingredient is commonly used in commercial skincare products, which suggests manufacturers have confidence in its stability and sensory profile. Individual tolerance and efficacy may vary depending on product formulation and skin condition, so observation during use remains the most practical guide to its suitability for individual skin.
How to Use
Biosaccharide Gum-5 is typically incorporated into serums, essences, moisturisers and hydrating masks at low concentrations. Because it is a humectant, it works most effectively when applied to damp or slightly moist skin — this allows it to draw that moisture into the skin rather than pulling water from deeper layers. For best results, apply the product to clean, slightly dampened skin and allow it to absorb before layering other products. It pairs well with occlusives (such as oils or heavier moisturisers) when the climate is dry, as this helps seal in the hydration it draws up.
Safety & Precautions
Frequently Asked Questions
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