Approximately 80% of dietary nitrates are derived from vegetable consumption; sources of nitrites include vegetables, fruit, and processed meats. Nitrites are produced endogenously through the oxidation of nitric oxide and through a reduction of nitrate by commensal bacteria in the mouth and gastrointestinal tract.

Where are nitrites found?

Nitrates (or nitrites) are natural chemicals that are found in the soil, air and water. Nitrates are also used as a food additive to stop the growth of bacteria and to enhance the flavour and colour of foods.

What are nitrites caused by?

Urinary tract infections are the most common cause of nitrites in urine. These occur when bacteria infect the bladder, ureters, or kidneys. A doctor can easily diagnose a urinary tract infection (UTI) by testing a urine sample.