Budget supermarket Lidl has recalled a brand of gravy granules because a paint thinning chemical was found in some batches.
Lidl has apologised to customers and said it had launched a full inquiry into how the products were contaminated.
Two batches of Kania Gravy Granules are said to be affected.
According to the Food Standards Agency (FSA), they have been found to contain unsafe levels of the chemical xylene.
Customers have been advised not to eat the products and return them for a full refund.
Lidl, which has stores across the Cheshire area, said it is also working with the supplier to determine the cause.
The FSA said in a statement: "The contaminant levels in this (gravy granules) product exceed those set to minimise this risk and the product is therefore being recalled as a precaution."
Xylene is a petrochemical used as a solvent in products such as paints and inks.
Health experts say the chemical can cause irritation of the mouth, throat, nose and lungs and in severe cases lead to heart problems, liver and kidney damage and coma.
The products affected are 300g packets of Kania Gravy Granules for meat and for chicken with best before dates of October and November 2017.
Other Kania products are not affected by the recall.
Lidl will display notices in all stores that sold the products, and customers are being urged to return the granules for a full refund.
A spokeswoman for Lidl said: "We were very sorry to hear of this matter and can confirm that an investigation was launched as soon as we were made aware.
"We are taking the issue very seriously and are working closely with our supplier to identify the cause."