Abstract
The purpose of our study was to assess the validity of the food frequency questionnaire (FFQ) used in the NESCaV study (Nutrition, Environment and Cardiovascular Health) for the measurement of food polyphenols intake. 53 volunteer adults, aged between 20 and 60, were included in the Stroxybio study*. The nutritional intake of total polyphenols estimated from the FFQ was compared with the results obtained from a 3-day dietary recording (EA) as well as the total polyphenol urine concentrations determined by the Folin-Ciocalteu method. The polyphenol feed composition was estimated using the Phenol-Explorer database. The median intakes of polyphenols estimated from FFQ and EA were 2270.92 mg per day and 1203.63 mg per day, respectively. The median urinary concentrations of polyphenols are 10678.57 μg of gallic acid equivalent per gram of creatinine. The results show that there was a strong association between the results of the two dietary questionnaires, FFQ and EA (r=0.633, p In conclusion, this study shows all the interest to combine both food survey and nutritional biomarker data to estimate exposure to polyphenols in a given population.
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