E476 – Polyglycerol polyricinoleate | PGPR in Chocolate, Uses & Safety

Quick analysis summary about E476 – Polyglycerol polyricinoleate food additive

Bottom line about E476

E476, also called polyglycerol polyricinoleate or PGPR, is an emulsifier best known for improving the flow of chocolate and fatty coatings. The overall grade is GREEN – SAFE because additive-specific animal studies and a small human tolerance study are broadly reassuring at permitted food-use levels.[1-6]

Why this grade for E476

The grade is based on extensive digestion, no carcinogenic effect in long-term rodent studies, no clear reproductive toxicity signal in rats, and no adverse effects in a small human feeding study. Several key studies are old and some are industry-linked, so the conclusion is reassuring but still supports moderation of highly processed confectionery.[1-6]

Who may want to limit or avoid E476

People who eat large amounts of chocolate, compound coatings, edible ices, or fatty emulsified sauces may want to keep intake moderate. People with digestive sensitivity may also prefer lower exposure.

Common uses and where E476 appears

E476 appears mainly in chocolate, chocolate-type coatings, confectionery fillings, fat-based spreads, edible ices, and some emulsified sauces. Manufacturers use it to reduce viscosity and help water-in-oil emulsions remain stable.[6]

E476 source or origin

E476 is a manufactured emulsifier made by esterifying polyglycerol with condensed castor oil fatty acids, which are rich in ricinoleic acid. Commercial safety also depends on purification and impurity specifications.

Intake note for E476

EFSA set an ADI (Acceptable Daily Intake) of 25 mg/kg body weight per day after identifying a NOAEL (No Observed Adverse Effect Level) of 2,500 mg/kg body weight per day in a two-year rat study.[1]

Is E476 banned anywhere?

E476 is authorised in the European Union for defined categories and maximum levels, and PGPR has FDA no-questions GRAS (Generally Recognized as Safe) notices in the United States for specified uses. No clear major food-use ban was identified, but permitted categories and limits vary by country.

Safety grading GREEN – SAFE

E476 is graded GREEN – SAFE because the total evidence supports low risk at normal food-use levels. The main recurring finding is higher liver and kidney weights in high-dose animal studies, but histology and functional evidence did not show organ injury, and EFSA interpreted the liver response as adaptive.[1,3,6]

Study basis or key toxicological reasoning for E476

The main additive-specific reference point is a two-year rat chronic toxicity and carcinogenicity study using 5% PGPR in the diet, about 2,500 mg/kg body weight per day, no carcinogenic effect or treatment-related histological injury was reported, so EFSA used this as the NOAEL for the ADI.[1,3] An 80-week mouse study also did not show carcinogenicity at 5% dietary PGPR.[3] Rat metabolism work showed that PGPR is extensively digested to polyglycerols and fatty acids, with no polymer detected in analysed tissues.[2] A three-generation Wistar rat study using 1.5% PGPR in feed found no cumulative effect on breeding performance, although EFSA considered it limited for deriving a guidance value.[1,4] A human study fed up to 10 g/day PGPR for two weeks to 19 volunteers and found no consistent adverse effects on tolerance, liver or kidney function, or fat balance.[5] The main uncertainty is that much of the direct evidence is older, but it remains additive-specific and internally consistent.[1-6]

Side effects of E476 – Polyglycerol polyricinoleate food additive

Digestive discomfort at high intake: large amounts of fat-rich processed foods containing E476 may contribute to nausea, fullness, or loose stools in sensitive people, although this is not a typical effect at normal use.
High-dose liver and kidney weight changes in animals: rodent studies reported heavier liver and kidney weights, but without treatment-related tissue injury or cancer.[1,3,6]
No clear cancer signal: long-term rat and mouse feeding studies did not find a carcinogenic effect from PGPR.[1,3]
No clear reproductive signal: the rat three-generation study did not show a treatment-related breeding effect, but the evidence is old and limited by modern standards.[1,4]
Source-related impurity control matters: because E476 is made from castor oil fatty acids and polyglycerol, modern specifications for impurities are important for product quality and safety.[1]

Should You Avoid E476 – Polyglycerol polyricinoleate food additive?

Most consumers do not need to avoid E476 when it appears occasionally in chocolate or similar foods. The better practical advice is moderation: E476 is most common in energy-dense confectionery, coatings, spreads, and sauces, so frequent high intake usually reflects a broader processed-food pattern. People with digestive sensitivity or those trying to reduce ultra-processed foods may choose products without PGPR, but the additive itself is not a high-concern toxicological signal at permitted levels.

Common uses of E476 – Polyglycerol polyricinoleate food additive

Chocolate bars and chocolate coatings, where it improves flow and mould filling
Compound chocolate and cocoa-based confectionery coatings
Filled confectionery and fat-based creams
Edible ices containing fat-and-water emulsions
Emulsified sauces with substantial fat content
Tin-greasing emulsions and some bakery-processing applications

Common names and synonyms of E476 – Polyglycerol polyricinoleate food additive

Polyglycerol polyricinoleate
PGPR
Polyglycerol polyricinoleic acid
Polyglycerol esters of condensed castor oil fatty acids
Glyceran esters of condensed castor oil fatty acids
Polyglycerol esters of interesterified ricinoleic acid
E476
INS 476

What is E476 – Polyglycerol polyricinoleate food additive?

E476 is a lipophilic, water-in-oil emulsifier. In chocolate, solid particles of cocoa, sugar, and milk ingredients sit in a fat phase. PGPR reduces yield stress and helps molten chocolate flow during moulding, coating, and enrobing. This can give smoother coatings and may reduce the amount of cocoa butter needed for the same flow behaviour.[6]

Chemically, E476 is made in several steps. Castor oil fatty acids are first obtained and condensed, mainly from ricinoleic acid-rich material. Separately, glycerol is polymerised into polyglycerol. The condensed fatty acids are then esterified with polyglycerol to form the final emulsifier mixture. Because castor beans naturally contain ricin in the seed material, finished food-grade PGPR depends on controlled manufacture. PGPR itself is not ricin and should not be confused with castor bean toxin.[1,6]

Where is E476 – Polyglycerol polyricinoleate food additive allowed (EU vs US)?

In the EU, E476 is authorised for specific categories such as cocoa and chocolate products, edible ices, and certain emulsified sauces, with maximum levels depending on the food category. In the US, PGPR is used under GRAS notices for specified applications such as chocolate, mayonnaise, and spreads, while producers remain responsible for lawful use and labeling.

E476 – Polyglycerol polyricinoleate