Open access
Oct 2026
Validity of a questionnaire to estimate vitamin A intake in pregnant women
The objective was to assess the relative validity of a food frequency questionnaire (FFQ) to estimate daily vitamin A intake in pregnant women using two biomarkers as references, maternal serum retinol and breast milk retinol. This is an observational, descriptive, analytical, cross-sectional study. FFQ was applied to...
M. T. Isobe, I. S. Ferraz, T. M. M. Deminice et al.
· Archivos latinoamericanos de... · 1 citation