The Co-operative Group has had to withdraw two own-label Cheddars after they were found to contain high levels of histamine, which can trigger symptoms of an allergic reaction.

The retailer withdrew a total of 172 cases amounting to nearly 3,000 packs from sale on 21 January after a customer complained of an allergic reaction. The move came to light this week when the FSA issued an advisory notice.

The affected products supplied by Adams Foods include The Co-operative British Extra Mature Cheddar and The Co-operative Welsh Extra Mature Cheddar. Shelf ­notices explaining to consumers why the products had been withdrawn went up in stores on Tuesday.

The FSA warned that symptoms included skin rash, low blood pressure, vomiting, diarrhoea, headaches, dizziness, palpitations and cramps.

An investigation as to the cause is under way.