Sucrose esters
Emulsifiers made by bonding sugar to fatty acids, used to blend fats and water smoothly in baked goods, desserts and drinks.
EFSA found that typical intakes in toddlers and high-consuming adults can exceed the safety limit. Manufacturing residues may also introduce arsenic, mercury and cadmium into food.
What is it?
Sucrose esters of fatty acids are a group of emulsifiers made by chemically combining sucrose (table sugar) with fatty acids from vegetable or animal fats. The result is a molecule with one end that mixes with water and one end that mixes with fat, making them effective emulsifiers. They are manufactured via a solvent process or by direct esterification, and the final product is a mixture of mono-, di- and tri-esters depending on the degree of substitution.
What does it do?
They sit at the interface between fat and water droplets, reducing surface tension so the two phases stay mixed rather than separating. In baked goods this improves crumb structure and volume by interacting with starch and gluten. In confectionery and coatings they thin the viscosity of chocolate-like products. In dairy and beverage applications they prevent cream or fat rising to the surface.
Where you will see it
Fine bakery products and cakes, chocolate and compound coatings, ice cream and frozen desserts, coffee whiteners and flavoured milks, whipped toppings, chewing gum, and some low-fat spreads. On a UK ingredient label it appears as 'sucrose esters of fatty acids', 'sucrose fatty acid esters', or 'E473'.
What the science says
ADI exceedance at real-world intakes
EFSA set the acceptable daily intake for sucrose esters at 40mg per kilogram of body weight per day in 2004. A 2018 refined exposure assessment and a further 2023 re-evaluation both found that mean estimated intakes for toddlers already exceed this limit, with high-consuming toddlers reaching roughly four times the ADI. High-consuming adults and children also exceed it under brand-loyal eating assumptions. EFSA described this as a concern but the additive remains authorised while further data are gathered.
Mean estimated exposure for toddlers was approximately 59mg/kg body weight per day under a brand-loyal scenario, exceeding the group ADI of 40mg/kg bw/day; the 95th percentile reached around 183mg/kg bw/day.
A refined exposure assessment incorporating manufacturer-reported use levels confirmed that estimated exposure to E473 exceeded the ADI for several population groups.
Heavy metal contamination from manufacturing
The 2023 EFSA opinion identified that the current product specifications allow levels of arsenic, mercury and cadmium that could contribute meaningfully to dietary exposure when sucrose esters are consumed at typical food-additive quantities. This is a contamination issue arising from the manufacturing process and raw materials, not from the sucrose ester molecule itself. EFSA flagged it as requiring tighter specification limits.
Analysis of current specifications showed that exposure to arsenic from E473 consumption could be substantial, and that potential exposure to mercury and cadmium was also high, raising concern about toxic element intake.
Toxicology and breakdown in the body
Sucrose esters are broken down in the gut into sucrose and fatty acids, both of which are normal food constituents. Animal studies available to the original evaluation found low oral toxicity. EFSA's review did not raise concerns about carcinogenicity or genotoxicity from the substance itself. The concerns that have accumulated are about cumulative dose and manufacturing purity rather than the fundamental chemistry of the additive.
Sucrose esters of fatty acids showed low oral toxicity in animal studies and were not considered to raise concerns for carcinogenicity; they are extensively hydrolysed in the gastrointestinal tract to sucrose and fatty acids.
Data gaps flagged by regulators
The 2023 EFSA opinion identified several unresolved data gaps: missing analytical data on erucic acid content, 3-MCPD and glycidyl ester levels in commercial products, limited trans-fatty acid information, and incomplete use-level documentation from manufacturers. These gaps mean EFSA could not fully map exposure for all population groups, and further data were requested from the food industry.
EFSA identified missing data on erucic acid, 3-MCPD, glycidyl esters and trans-fatty acids in commercial sucrose ester products, and called for industry to submit updated analytical and use-level data.
Where it stands with the regulators
Who should be careful
Parents of toddlers and young children should be aware that this population group is most likely to exceed the safety limit through regular intake of products containing E473, particularly cakes, biscuits, desserts and flavoured milks. Adults who eat large quantities of these food categories daily are also at higher exposure. Look for 'E473' or 'sucrose esters of fatty acids' in the ingredients list. No specific allergen declaration is required for E473.
The honest read
Sucrose esters have been used in food manufacturing for decades and break down in the gut into ordinary sugar and fat. The underlying chemistry does not raise a genotoxicity or carcinogenicity signal. What has changed is the accumulation of regulatory exposure data: EFSA has now confirmed on three separate occasions since 2010 that estimated real-world intakes for certain groups, particularly toddlers, consistently exceed the agreed safety limit. That does not mean harm has been observed in those groups, but it means the margin between what is consumed and what regulators consider acceptable has closed. The additional finding in 2023 about arsenic, mercury and cadmium residues in the commercial ingredient is a separate and more concrete concern that EFSA asked manufacturers to address. The science is not settled in the sense that manufacturers are still being asked to provide data EFSA considers missing.
Related additives
Common questions
Is E473 banned in the UK?
No, E473 is currently approved for use in the UK under the assimilated version of EU Regulation 1333/2008 and is on the UK FSA approved additives list. It remains permitted while EFSA continues to gather updated data from manufacturers.
Why has EFSA raised concerns about E473 if it is still approved?
EFSA found that estimated intakes for toddlers and high-consuming adults already exceed the group acceptable daily intake of 40mg per kilogram of body weight per day. The additive remains authorised because exceedance of an ADI does not automatically trigger a ban, but EFSA has requested updated data from industry and the situation is under active regulatory review. EFSA also identified that manufacturing residues of arsenic, mercury and cadmium in the commercial ingredient need tighter controls.
What foods contain E473?
E473 is most common in fine bakery goods such as cakes and pastries, chocolate and compound coatings, ice cream, frozen desserts, coffee whiteners, flavoured milk drinks and whipped toppings. Check the ingredients list for 'E473' or 'sucrose esters of fatty acids'.
Is E473 vegan?
It depends on the source of the fatty acids used in production. Sucrose esters can be made from plant-derived fats (such as palm or sunflower) or from animal-derived fats. Manufacturers are not required to state the fatty acid source on the label, so vegan consumers cannot confirm plant-origin from the label alone. Contacting the manufacturer or looking for certified vegan products is the only reliable route.
Sources
- EFSA FAF Panel: Re-evaluation of sucrose esters of fatty acids (E 473) as a food additive in foods for infants below 16 weeks of age and follow-up of previous evaluations, EFSA Journal 2023;21(4):7961
- EFSA ANS Panel: Refined exposure assessment of sucrose esters of fatty acids (E 473) from its use as a food additive, EFSA Journal 2018;16(3):5087
- PMC full text: Re-evaluation of sucrose esters (E 473) 2023
- UK FSA: Approved additives and E numbers
- UK FSA research: Development of a validated method for the determination of sucrose esters (E473) and sucroglycerides (E474)
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