E400 - Alginsäure

Origin

Alginic acid is a naturally occurring polysaccharide extracted from brown algae (Phaeophyceae). The major sources include species of *Laminaria*, *Macrocystis*, and *Ascophyllum*. The extraction process involves alkaline extraction followed by precipitation with acid. The resulting alginic acid is then purified and dried.

Usage

Alginic acid is widely used in the food industry as a thickening, gelling, stabilizing, and emulsifying agent. It is particularly useful in applications requiring cold-setting gels. Common applications include: * **Thickening agent:** In sauces, soups, and beverages. * **Gelling agent:** In desserts, fruit preparations, and restructured foods. * **Stabilizer:** In ice cream and other frozen desserts to prevent ice crystal formation. * **Emulsifier:** In salad dressings and other emulsions to improve stability. * **Film-forming agent:** In edible films and coatings for fruits and vegetables. It is also used in pharmaceutical and cosmetic applications.

Side Effects

Alginic acid is generally considered safe for consumption. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) of 'not specified', meaning that, based on available data, the total daily intake of the substance arising from its use at levels necessary to achieve the desired effect and from its acceptable background in food, does not represent a hazard to health. Some individuals may experience mild gastrointestinal discomfort, such as bloating or diarrhea, if consumed in large quantities. Allergic reactions are rare but possible. No significant adverse effects have been reported in scientific literature at levels typically used in food.

Regulatory Status

Alginic acid is approved for use as a food additive in many countries, including the United States, the European Union, and Canada. In the EU, it is designated as E400. Regulations specify purity criteria and maximum levels of use in various food categories. The FDA considers alginic acid as GRAS (Generally Recognized As Safe) when used in accordance with good manufacturing practices.