What it is
Alpha-glucan is a polysaccharide composed of glucose units linked predominantly through alpha glycosidic bonds. In cosmetic formulas it acts as a water-binding, skin-conditioning agent and can form a light surface film that supports a smooth feel. It is commonly used to add a soft, moisturized finish to lotions and sunscreens.
Safety & warnings
Glucose-based polysaccharides of this type are generally well tolerated and non-irritating at cosmetic use levels. It is water-soluble rather than oily and is not considered comedogenic.
Origin & sourcing
It is typically produced by enzymatic or microbial conversion of plant-derived sugars such as sucrose, yielding a glucose polymer; it can also occur naturally in some plant and microbial sources.
Questions everyone asks
What does alpha-glucan do in a sunscreen?
It works as a humectant and film-forming conditioning agent, helping the product feel smooth and hydrated on the skin.
Is alpha-glucan the same as beta-glucan?
No. Both are glucose polymers, but they differ in how the glucose units are linked, and they are distinct ingredients with different properties.