Estimating nitrate intake in the Australian diet: Design and validation of a food frequency questionnaire.

ABSTRACT:

Background

Dietary nitrates may play a role in mediating several key physiological processes impacting health and/or exercise performance. However, current methods for assessing dietary nitrate (NO₃ ^- ) consumption are inadequate. The present study aimed to examine the dietary nitrate intake in a sample of 50 healthy adults, as well as test the validity of a purposefully developed food frequency questionnaire (FFQ).

Methods

Dietary nitrate intake was estimated over a week using (i) three 24-h dietary recalls; (ii) a short-term (7-day) FFQ; and (iii) a biomarker (urinary nitrate), in conjunction with a nitrate reference database.

Results

Daily dietary nitrate intake estimates were 130.94 mg (average of three 24-h recalls) and 180.62 mg (FFQ). The

SUBMITTER: McMahon NF 

PROVIDER: S-EPMC10084179 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature