Polydextrose
A soluble glucose-based polymer used for fibre contribution and bulk in foods where the balance of solids, sweetness and texture is being reformulated.
Ingredient overview
Polydextrose is produced through controlled polymerisation of glucose into a highly branched carbohydrate with a range of linkages. Commercial production commonly also involves sorbitol and an acid catalyst. Purification and neutralisation create preparations with different residual components and sensory profiles.
Its main food functions are soluble bulk and fibre contribution. It adds carbohydrate solids with relatively little sweetness, giving it a different role from conventional sugars. The resulting product texture depends on how those solids interact with water, fat and other ingredients.
Functional characteristics
| Characteristic | Technical profile |
|---|---|
| Solubility | Dissolves into the aqueous phase. |
| Bulk | Replaces part of the physical mass otherwise supplied by conventional carbohydrate solids. |
| Sweetness | Low relative to sucrose, separating bulk from sweetness delivery. |
| Texture | Contributes body within the dissolved-solids system. |
| Acidity | Residual acidity and neutralisation distinguish commercial preparations. |
Applications
| Application | Ingredient role | Contribution to the product |
|---|---|---|
| Bakery and biscuits | Solids adjustment | Changes to bulk and finished texture. |
| Bars | Fibre-containing binder solids | Modification of cohesion and moisture balance. |
| Frozen desserts | Soluble bulk | Changes to body within the sugar, fat and stabiliser system. |
| Confectionery and fillings | Carbohydrate-system reformulation | Bulk with a different sweetness contribution. |
Formulation behaviour
Polydextrose enters the water phase as dissolved carbohydrate. In high-solids products, it influences the overall balance between water and dry matter. That balance affects viscosity, stickiness and the way moisture redistributes during storage.
Sugar replacement changes several functions at once. Polydextrose provides bulk but has a different effect on sweetness, browning, crystallisation and freezing behaviour from sucrose or glucose syrup. Residual acidity can also matter in delicate flavours or pH-sensitive formulations. The complete carbohydrate system therefore determines the finished product's sensory and physical properties.
Material forms
Powders and liquid preparations provide different handling formats. Purification, decolourisation and neutralisation distinguish commercial materials, as do dry solids and residual small carbohydrates. A liquid preparation contributes water in addition to its polydextrose-containing solids.
Comparison with related ingredients
Resistant dextrin is produced through starch processing and has a different molecular distribution. FOS and oligofructose contribute more sweetness in many preparations. Long-chain inulin offers a distinct structuring mechanism that polydextrose does not share.