Thickeners

Starches and gums have different structures

Starch and xanthan gum are polysaccharides made from long chains of carbohydrate building blocks. Their organisation and physical properties differ. Starches can be modified to obtain specific technological characteristics, while gums have their own behaviour in dispersion. Formulas may combine ingredients to create a defined texture. This material nature explains the thickening function and distinguishes such preparations from powders whose main role is protein or calorie supply. An ingredient’s physical action and nutritional contribution are different parts of its composition.

Viscosity, flow and gel formation

Viscosity describes a liquid’s resistance to flow. A thickened liquid differs from a gel in structure and physical behaviour. Transparency, cohesion and texture stability are additional characteristics. Milk-based drinks, water and other foods have different starting compositions, so the medium contributes to the resulting texture. Temperature and elapsed time can also belong to the documented preparation parameters. Flow, cohesion and whether the structure is liquid or gel therefore provide complementary descriptions of the prepared food’s physical behaviour.

Adapted texture and nutritional profile

Clinical thickeners may be foods for special medical purposes. Use under medical supervision concerns a defined need, with consistency determined by the relevant healthcare team. Texture and nutritional value remain different dimensions: protein, energy and water depend on the original food and added formulation. A thickened drink and a nutritionally complete oral supplement consequently retain different profiles even where their consistencies look similar. Thickening therefore describes a physical function rather than a complete definition of the food’s nutritional content.

Frequently asked questions