Xanthan gum
Xanthan gum is a highly functional polysaccharide (E415) used as a thickener, stabilizer and rheology modifier in a wide range of food products. It provides high efficiency at very low dosages, excellent stability over a broad pH range, and resistance to pasteurization, sterilization and freezing processes. It is particularly valued for its ability to deliver stable viscosity at low concentrations and to prevent phase separation in complex formulations.
Source
Xanthan gum is produced industrially by controlled aerobic fermentation of carbohydrates (typically glucose or sucrose) using the bacterium Xanthomonas campestris. After fermentation, the polysaccharide is precipitated (usually with ethanol), then dried and milled into powders of different particle sizes. Depending on raw materials and process controls, gluten-free and GMO-free grades are available, which is important for specialized and clean label food products.
Variations
Various xanthan gum grades are available on the market, differing in:
- particle size (fine, medium, coarse powder)
- solubility and dispersion speed
- purity level and ash content
- specific rheological profiles (e.g. for viscous sauces, beverages, suspensions)
Manufacturers often offer tailored grades for specific applications (e.g. for bakery, beverages, sauces or gluten-free products), enabling precise control of texture and stability.
Applications In The Food Industry
Bakery Industry
In bakery products, and especially in gluten-free baking, xanthan gum is used to:
- improve structure and gas retention
- increase loaf volume and enhance crumb porosity
- reduce crumbling and extend softness and freshness
In conventional bakery formulations it is applied in reduced-fat products and in doughs with high fiber or sugar content to help maintain elasticity and dough stability.
Dairy Industry
In dairy and dairy-alternative products, xanthan gum provides:
- homogeneous and creamy texture in fermented dairy products, dairy drinks and plant-based “milks”
- prevention of syneresis (whey separation) in yogurts and desserts
- suspension stability in cocoa drinks and protein beverages
It is especially important in low-fat and non-dairy alternatives, where it compensates for the loss of body and creaminess due to fat reduction or removal.
Savory Foods Industry
In sauces, dressings, mayonnaise, ready meals and savory spreads, xanthan gum is used to:
- thicken and achieve targeted, stable viscosity
- prevent settling of spices and particulates (pepper, herbs, proteins)
- improve adhesion to the food surface (e.g. dressing on salads)
Its resistance to freeze–thaw cycles makes it suitable for chilled and frozen ready-to-eat meals as well.
Beverage Industry
In the beverage industry, xanthan gum is primarily used in:
- clear and cloudy juices with pulp (pulp and suspension stabilization)
- low-calorie syrups and functional drinks, where it provides body and a uniform mouthfeel
- carbonated soft drinks and flavored waters for stabilization of flavors and colors
Due to its pseudoplastic behavior (viscosity decreases under shear), xanthan gum allows easy drinking and good flow while maintaining a pleasant fullness.
Benefits Of Use
The use of xanthan gum in the food industry delivers a number of technological and commercial advantages:
- efficient thickening at low dosage (cost reduction and formulation optimization)
- stable viscosity over a wide pH and temperature range and during shelf life
- improved texture, uniform mouthfeel and a more “premium” sensory perception
- high emulsion and suspension stability (reduced phase separation, improved product appearance)
- suitability for gluten-free, low-fat, “free from” and specialized products, with strong regulatory acceptance in global markets
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