Octenyl succinic acid modified gum arabic
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Description
E423, known as octenyl succinic acid (OSA) modified gum arabic, is a food additive derived from natural gum arabic (E414), an exudate from Acacia senegal and Acacia seyal trees. It is obtained through a controlled chemical modification: gum arabic is treated with octenyl succinic anhydride under alkaline conditions, introducing hydrophobic groups (octenyl succinate) into the polysaccharide structure. This improves its emulsifying and stabilizing properties, especially in oil-water systems.
Physically, it is a white or slightly yellowish powder, soluble in cold and hot water, forming viscous solutions. Its main functions are as a thickener, emulsifier, and stabilizer, preventing phase separation in foods.
It was approved in the European Union as a new additive in 2014 (EU Regulation 2014/231), following evaluations by EFSA (European Food Safety Authority) and JECFA (Joint FAO/WHO Expert Committee on Food Additives). EFSA established an Acceptable Daily Intake (ADI) of 0-2 mg/kg body weight for the OSA component, while the modified gum arabic itself has no specific ADI, considered safe at use levels.
WHO also evaluated it, concluding no safety concerns at authorized doses. Globally, it is considered a safe additive, with low allergenic potential and no significant adverse effects in animal and human studies. On labels, it must appear as "octenyl succinic acid modified gum arabic" or "E423". Its use is permitted in a wide range of foods, such as flavored drinks, dairy products, sauces, confectionery, and dietary supplements, always within the limits set by EC Regulation 1333/2008.
E423 is mainly used as a thickener, emulsifier, and stabilizer in various food categories. According to EC Regulation 1333/2008, it is authorized in: flavored drinks (up to 100 mg/L), fermented dairy products (up to 500 mg/kg), sauces and condiments (up to 1000 mg/kg), confectionery (up to 500 mg/kg), and food supplements (up to 1000 mg/kg).
In the Spanish market, it is found in orange sodas, liquid yogurts, light mayonnaise, soft candies, and energy bars. Its maximum limit varies by category but generally does not exceed 1000 mg/kg. Comparatively, the FDA (USA) allows it as a GRAS (Generally Recognized As Safe) additive at similar levels, while Japan authorizes it with stricter restrictions in some products.
The versatility of E423 lies in its ability to stabilize emulsions and improve texture without altering flavor.
Toxicological studies conducted by EFSA and JECFA indicate that E423 does not present significant adverse effects in humans at authorized doses. In animal trials, high doses (above 2000 mg/kg/day) showed a slight increase in liver and kidney weight, but without toxicological relevance. No carcinogenic, genotoxic, or teratogenic effects have been documented.
The biological mechanism is similar to that of gum arabic: it is not digested in the small intestine, partially ferments in the colon, producing short-chain fatty acids. Sensitive populations, such as people with allergies to acacia, could experience mild allergic reactions, although this is rare. No interactions with medications are known. EFSA concludes that E423 is safe at authorized use levels, and WHO supports this assessment.
Therefore, no side effects are expected with normal consumption.
- OSA modified gum arabic
- OSA gum arabic
- OSA-gum arabic
- Succinylated gum arabic
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