Food additives database

E435 – Polysorbate 60

Orange grain dots symbol for food additive with some concerns (E number classification – ORANGE level).

Category:

Published:

Last modification:

Safety grading ORANGE – SOME CONCERNS

E435 has a current EFSA group ADI (Acceptable Daily Intake) of 25 mg/kg bw/day for polysorbates 20, 40, 60, 65 and 80. EFSA based that value on a long-term rat carcinogenicity study with an overall NOAEL (No Observed Adverse Effect Level) of 2,500 mg/kg bw/day, supported by subchronic studies; older European evaluations were more conservative because diarrhea in a 13-week rat feeding study was treated as the critical endpoint, with a NOAEL around 1,000 mg/kg bw/day (Aguilar et al., 2015; DOI:10.2903/j.efsa.2015.4152). In practical terms, regulators do not treat E435 as clearly unsafe at permitted food-use levels, but the gastrointestinal tolerance data are one reason it does not earn an easy green light.

We grade E435 as ORANGE – SOME CONCERNS rather than GREEN – SAFE. The reason is not that it is banned in the European Union or the United States, because it is not. The reason is that polysorbate 60 belongs to a synthetic emulsifier family with persistent gut-barrier and microbiome questions. In rat intestinal tissue, polysorbate 60 released lysosomal enzymes and slightly increased permeability at experimental concentrations of 10 mg/mL, suggesting possible irritation of the mucosal barrier (Tagesson and Sjödahl, 1984; PMID:6094320). In human Caco-2 cell monolayers, polysorbate 60 increased permeability in a concentration-dependent way, and those shifts tracked with lower cell viability, pointing to membrane-active effects at sufficiently high exposure (Dimitrijevic et al., 2000; PMID:10714945).

The signal is not one-directional. In a Crohn’s disease model, polysorbate 60 increased E. coli translocation across Caco2-cl1 monocultures 14.2-fold at 0.1%, but it did not increase translocation across M-cells in the same study, which made it look less disruptive than polysorbate 80 rather than equally problematic (Roberts et al., 2010; PMID:20813719). Human data are more reassuring than the cell work. A four-week double-blind feeding trial in adults with active Crohn’s disease found no worsening of disease activity on a higher-emulsifier diet compared with a lower-emulsifier diet (Fitzpatrick et al., 2025; PMID:39967287). A placebo-controlled trial in healthy adults likewise found no increase in fecal calprotectin, C-reactive protein or intestinal permeability after short-term emulsifier supplementation, although short-chain fatty acid concentrations were lower than with placebo (Wellens et al., 2026; PMID:40816342). Rare immediate hypersensitivity to polysorbate 60 has also been reported (Schwede et al., 2019; PMID:31389792). Taken together, the evidence does not justify RED – UNSAFE, but it does leave enough unresolved concern for ORANGE.

Should You Avoid E435?

Most people do not need to panic about occasional exposure. Still, limiting it is reasonable if you are trying to reduce ultra-processed foods, if you have inflammatory bowel disease or a very sensitive gut, or if you have a known history of reactions to polysorbates or polyethylene glycol (PEG, Polyethylene Glycol)-related excipients. The strongest practical advice is not “never eat one product containing E435,” but “do not let emulsifier-heavy processed foods dominate your diet.”

Common Uses

  • Whipped toppings and non-dairy toppings, where it helps fat and water stay mixed and keeps the texture stable.
  • Cake mixes, icings and fillings, where it improves aeration, softness and shelf stability.
  • Coffee whiteners and cream-style emulsions, where it prevents separation.
  • Ice cream, frozen desserts and dessert creams, where it improves smoothness and melt resistance.
  • Bakery fats and confectionery coatings, where it supports processing and a more uniform texture.

Common names / Synonyms

  • Polysorbate 60
  • Polyoxyethylene (20) sorbitan monostearate
  • Polyoxyethylene sorbitan monostearate
  • PEG-20 sorbitan stearate
  • Tween 60

What is it?

E435 is a non-ionic surfactant and emulsifier. In plain language, it is a molecule designed to sit at the boundary between water and fat so the two phases stay mixed instead of separating. Chemically, polysorbate 60 is made in several steps. First, sorbitol is dehydrated to form sorbitan. That backbone is then esterified mainly with stearic acid, although commercial material can also contain some palmitic acid esters. In the final step, ethylene oxide is added to introduce about 20 oxyethylene units, which makes the molecule much more water-friendly. That balance between a fatty acid portion and a hydrated polyoxyethylene portion is what gives E435 its emulsifying behavior.

From a food-technology viewpoint, E435 is useful because it stabilises foams, improves volume, slows staling in bakery systems and helps create a smooth mouthfeel in products that would otherwise split, leak fat or lose structure. It is particularly valued in whipped systems and in products that need to survive processing, transport and storage without visible separation. It is not added for flavour. It is added for texture, stability and manufacturing consistency.

Although some starting materials can come from familiar sources such as sorbitol and fatty acids, E435 itself is still a synthetic additive. Safety discussions therefore include not only the main molecule but also manufacturing purity. Residual ethylene oxide and 1,4-dioxane are controlled through specifications because they can arise during manufacture if purification is poor. Modern regulatory assessments consider those residues to be low when the additive meets specification, but that is another reason why E435 is better understood as an industrial emulsifier than as a “natural” kitchen ingredient.

Where it’s allowed (EU vs US)

E435 is authorised in the European Union and appears in the Union list of permitted food additives under the polysorbate group. In the United States, polysorbate 60 is permitted for direct food use under category-specific conditions in 21 CFR 172.836, so it is allowed there as well, but not as a free-for-all ingredient with no limits.

Further reading

Comments

Leave a Reply