If you want to sell pink burgers you’re going to have to get your head round some pretty serious microbiology. A six log reduction means the number of germs is 1,000,000 times smaller after a process such as cooking to 70 degrees for 2 minutes is completed.
The FSA & ACMSF state that a six log reduction is what businesses should be achieving. However, since the whole rare burger issue appeared on the scene, the FSA has stated that a four log reduction could be acceptable if the business has an otherwise robust HACCP-based food safety management system in place, which includes measures, alongside any cooking process, to minimise or reduce the bacterial loading of the mince used AND suitable signage top warn customers about the risks. A four log reduction means that the number of germs is 10,000 times smaller after the process.