Volatile nitrosamines in fried bacon.

Higher levels of NPy and NDMA in cooked bacon and its cooked-out fat were associated with those cures which contained higher levels of nitrite, but no correlation between nitrosamine concentrations and initial nitrate levels was observed. There was a higher proportion of nitrosamines in cooked-out fat than in cooked bacon, but by far the greatest amounts were lost in the vapours produced during cooking.