Dietary exposure to N-nitrosamines and their precursors: an age-stratified assessment.

For nitrites, a similar positive trend was observed in the nitrite/vitamin C and nitrite/vitamin E ratios, with adults from the 18–50 age group exhibiting values eight to nine times higher than younger age groups and a decreasing trend occurred in individuals from the 66–95 group (Fig. 3 c, d).

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In the case of nitrate/vitamin C and nitrate/vitamin E ratios, an increasing trend was observed from childhood to adulthood (Fig. 3 a, b).

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