E628 - Guanylate dipotassique

Origin

Dipotassium guanylate (E628) is a flavor enhancer. It is the dipotassium salt of guanylic acid, a naturally occurring nucleotide. Guanylic acid is found in various organisms, including animals, plants, and fungi. Commercially, dipotassium guanylate is typically produced from yeast extract or through the fermentation of sugars. It can also be derived from dried fish or dried seaweed. It is often used in conjunction with monosodium glutamate (MSG) to provide a synergistic umami taste.

Usage

Dipotassium guanylate is used as a flavor enhancer in a wide variety of processed foods. It enhances the savory or umami taste of foods, making them more palatable. It is commonly found in instant noodles, snack foods (such as potato chips and crackers), sauces, soups, and processed meats. It is typically used in relatively small concentrations, as it has a potent flavor-enhancing effect. It is often used in combination with other flavor enhancers like MSG (E621) and disodium inosinate (E631) to create a more intense and complex flavor profile. It does not impart any flavor of its own, but rather amplifies existing flavors.

Side Effects

Dipotassium guanylate is generally considered safe for consumption by most people. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has not established a numerical Acceptable Daily Intake (ADI) for guanylates, indicating a low level of concern regarding its safety at typical levels of use. However, individuals with gout may need to limit their intake of purine-rich substances, as guanylates are metabolized into uric acid, which can exacerbate gout symptoms. While rare, some individuals may experience mild allergic reactions or sensitivities to guanylates. Symptoms may include headaches, nausea, or skin rashes. There is no strong evidence to suggest that dipotassium guanylate is carcinogenic or teratogenic.

Regulatory Status

Dipotassium guanylate (E628) is approved for use as a food additive in many countries, including the European Union, the United States, and Canada. In the EU, it is listed under Annex II of Regulation (EC) No 1333/2008 and is subject to specific purity criteria. In the United States, it is generally recognized as safe (GRAS) by the Food and Drug Administration (FDA) when used in accordance with good manufacturing practices. Food products containing dipotassium guanylate must be labeled accordingly to inform consumers of its presence.