E413 - Tragacanth

Origin

Tragacanth is a natural gum obtained from the dried sap of several species of Middle Eastern legumes of the genus *Astragalus*, primarily *Astragalus gummifer*. The gum is exuded from incisions made in the plant's stem and then dried. It is a complex mixture of polysaccharides, mainly consisting of water-soluble and water-insoluble fractions. The water-soluble fraction is known as tragacanthin, while the water-insoluble fraction is called bassorin. The gum has been used for centuries as a thickener, stabilizer, and emulsifier.

Usage

Tragacanth gum is used in a wide range of food products due to its ability to increase viscosity and stabilize emulsions. It is commonly found in salad dressings, sauces, ice cream, and bakery fillings. It is also used in confectionery, such as gum pastes and fondant, for its ability to create a smooth and pliable texture. Beyond food, tragacanth is used in pharmaceuticals as a suspending agent and binder in tablets and lozenges. It also finds application in cosmetics and textile printing.

Side Effects

Tragacanth is generally considered safe for consumption. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has not established a numerical Acceptable Daily Intake (ADI) for tragacanth, indicating that it poses a low risk to human health at levels typically used in food. However, some individuals may experience allergic reactions, particularly those with known allergies to other legumes. High consumption of tragacanth may cause gastrointestinal discomfort, such as bloating or diarrhea, due to its high fiber content. There have been rare reports of occupational asthma in individuals repeatedly exposed to tragacanth dust.

Regulatory Status

Tragacanth (E413) is permitted as a food additive in many countries, including the European Union and the United States. In the EU, it is subject to specific purity criteria and labeling requirements. In the United States, it is Generally Recognized as Safe (GRAS) when used in accordance with good manufacturing practices. The FDA regulates its use under 21 CFR 184.1351.