Intake of nitrates and nitrites is not related to the risk of glioma (brain tumors found in supportive tissue) as reported through a new study from Imperial College London and Harvard.
The study examined the relationship between intakes of meats, nitrate, nitrite and two nitrosamines [nitrosodimethylamine (NDMA) and nitrosopyrolidine (NPYR)] and glioma risk in a prospective analysis that included data from three U.S. prospective cohort studies.
The analysis reviewed 335 glioma cases that were diagnosed during 24 years of follow-up. Dietary intake was assessed with food frequency questionnaires. Nitrate, nitrite and nitrosamine values were calculated based on published values of these nutrients in various foods over different periods in time.
Risk of glioma was not elevated among individuals in the highest intake category of total processed meats, nitrate, nitrites, or NDMA compared with the lowest category. No effect modification was observed by intake of vitamins C or E or other antioxidant measures.
These results correspond with recent findings that the nitrites and nitrates do not increase the risk of having cancer and, in fact, have health benefits.
Source: AMI - American Meat Institute