E484 - Stearyl citrate

Origin

Stearyl citrate is a synthetic ester formed by reacting stearyl alcohol with citric acid. Stearyl alcohol is a fatty alcohol derived from stearic acid, a naturally occurring saturated fatty acid found in animal and vegetable fats. The production process involves esterification, where the alcohol and acid react to form an ester and water. The resulting stearyl citrate is a white to off-white waxy solid.

Usage

Stearyl citrate is primarily used as a synergist for antioxidants in edible oils and fats. It enhances the effectiveness of antioxidants like tocopherols (vitamin E) and ascorbyl palmitate, preventing or delaying rancidity and extending the shelf life of food products. It functions by chelating trace metals that can catalyze oxidation reactions. Stearyl citrate is found in margarine, vegetable oils, shortening, and other fat-containing foods. The typical usage level is relatively low, usually less than 0.1% of the total product weight. It can also be found in cosmetics and personal care products as an emollient and skin-conditioning agent.

Side Effects

Stearyl citrate is generally considered safe for consumption at the levels typically used in food. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated stearyl citrate and established an Acceptable Daily Intake (ADI) of "not specified," meaning that, based on available data, the total dietary intake of the substance arising from its use at the levels necessary to achieve the desired effect does not represent a hazard to health. No significant adverse effects have been reported in human studies at relevant dietary levels. However, as with any food additive, some individuals may experience sensitivity or allergic reactions, although these are rare. Extensive toxicological studies have not revealed any significant concerns regarding carcinogenicity, genotoxicity, or reproductive toxicity.

Regulatory Status

Stearyl citrate (E484) is permitted for use as a food additive in many countries, including those in the European Union. Its use is regulated by specific food additive regulations that define the permitted food categories and maximum usage levels. In the United States, stearyl citrate is generally recognized as safe (GRAS) for use as an antioxidant synergist in food, subject to good manufacturing practices. The European Food Safety Authority (EFSA) has also evaluated stearyl citrate and concluded that its use as a food additive is safe under the specified conditions of use.