People are being advised by the Food Standards Agency not to consume 350g jars of the sauce with a best before date of February 2013.
The warning comes after one jar from the batch - carrying the code 1218R 07:21 - was found to have been contaminated with the bacteria Clostridium botulinum, which causes botulism.
The "precautionary measure" was prompted by the hospitalisation of two members of the same family in Scotland.
Both have contracted botulism after eating from a jar of the batch of sauce. The FSA said no other batches of Loyd Grossman products are thought to be affected.