Polyvinyl alcohol
A synthetic polymer used as a film coating on food supplement tablets and capsules. Passes through the gut largely unabsorbed.
What is it?
Polyvinyl alcohol (PVA) is a water-soluble synthetic polymer made by polymerising vinyl acetate and then hydrolyising the acetate groups. It forms thin, flexible, transparent films. In food use it is a high-molecular-weight material distinct from industrial or low-grade PVA grades. It carries no nutritional value and is not digested.
What does it do?
Acts as a glazing and film-forming agent. Applied as a thin coating to the surface of tablets and capsules in food supplements, it protects the contents from moisture and oxygen, masks unpleasant tastes, helps tablets slide down more easily, and gives them a smooth, consistent appearance. It dissolves in the stomach once ingested.
Where you will see it
Found almost exclusively as a coating on food supplement tablets and capsules, including vitamin pills, mineral supplements, and herbal tablets. It is not used in ordinary grocery foods. On the label it appears as 'polyvinyl alcohol' or 'E1203' in the ingredients list of a supplement.
What the science says
Absorption and gut fate
Studies show that high-molecular-weight polyvinyl alcohol is very poorly absorbed from the gut. The bulk passes through and is excreted. Animal studies found no accumulation in tissues at food-relevant doses. EFSA's ANS panel reviewed the available toxicological data and concluded the substance raised no safety concern at the levels used as a film coating on supplements.
EFSA's Panel on Food Additives and Nutrient Sources (ANS) evaluated polyvinyl alcohol as a food additive for use on food supplements and found no safety concern at the authorised use level of 18,000 mg/kg in the coated product.
A 2014 EFSA statement on a proposed modification to PVA's ethanol-solubility specification concluded the change would not alter the safety assessment already in place.
Long-term and repeat-dose toxicology
Animal feeding studies with polyvinyl alcohol have not produced evidence of carcinogenicity, reproductive toxicity, or organ damage at doses far exceeding those from normal supplement use. Because dietary exposure from a tablet coating is extremely small, the margin between the no-observed-adverse-effect level in animals and human intake is very large.
Repeat-dose animal studies included in the original EFSA dossier showed no systemic toxicity, carcinogenicity, or reproductive effects at doses used in food-additive assessment.
Where it stands with the regulators
Who should be careful
No specific population group needs to avoid it based on current evidence. Anyone with a known sensitivity to PVA-based materials should check supplement labels for 'polyvinyl alcohol' or 'E1203'.
The honest read
E1203 is a well-established pharmaceutical excipient that has been coating tablet medicines for decades before entering food supplements. The permitted food use is narrow: only as a coating on supplement tablets and capsules, so the quantity a person actually ingests is tiny. The toxicological database is consistent across animal and in-vitro work, and EFSA has reviewed it twice without raising a concern. There is no live scientific debate about this additive at current exposure levels.
Related additives
Common questions
Is E1203 banned in the UK?
No. E1203 is approved in the UK under the retained version of EU Regulation 1333/2008 and appears on the FSA's approved-additives list. Its use is restricted to glazing or film-coating food supplements in tablet or capsule form.
Why is a plastic polymer used in food supplements?
Polyvinyl alcohol has a very long track record as a coating material in pharmaceutical tablets. It forms a thin, water-soluble film that protects the contents from moisture and air, masks bitter tastes, and helps tablets pass down the throat. The same properties made it attractive for supplement manufacturers. The coating dissolves once it reaches the stomach.
What foods contain E1203?
Almost exclusively food supplements, such as vitamin and mineral tablets and capsules. It is not authorised for use in ordinary grocery foods such as confectionery, beverages, or packaged meals.
Is E1203 vegan?
Yes. Polyvinyl alcohol is a fully synthetic polymer derived from petrochemical starting materials. It contains no animal-derived ingredients.
Sources
- EFSA ANS Panel Statement on modification of E1203 ethanol-solubility specification (2014)
- EFSA approves food supplement coating agent (Food Navigator, 2006)
- EFSA finds pharma pill coating is safe for food supplements (NutraIngredients, 2013)
- UK FSA Approved Additives and E Numbers
- EU Regulation 1333/2008 on food additives (Annex II)
See this on every food you scan
NutraSafe reads the label and puts every additive into plain English, with the source, right in the app.
Get NutraSafe on the App Store