Diyetin Total Fitokimyasal İçeriğinin Saptanmasına Yönelik Araç Geliştirilmesi

Abstract

Doğan, F., Development of a Tool fort he Determination of Total Phytochemical Content of Diet, Hacettepe University, Graduate School of Health Sciences, Nutrition Sciences Program Master Thesis, Ankara, 2022. The aim of this study is to create a tool that can measure the phytochemical content of the diet, and to comparatively evaluate the phytochemical index and total antioxidant capacity of the diet in healthy individuals. This research consists of two stages. In the first stage, literature review of phytochemicals and 24-hour retrospective food consumption record for 100 adult individuals were evaluated and the phytochemical content detection tool of the diet was developed. In the second stage, individuals (233 females, 195 males) responded to online questionnaire that included general characteristics, general nutritional status, general health conditions, tool for determining the phytochemical content of the diet, and a 24-hour retrospective food consumption record. The phytochemical index intake value of individuals according to the frequency of food consumption is lower in men (20.69 ± 12.80) than in women (27.31 ± 15.93). According to the food consumption record, the phytochemical index intake value is higher in men (60.30 ± 62.39) than in women (54.71 ± 38.23). The values obtained from both the frequency of food consumption and the food consumption record were above 20 points determined according to the Western diet. In this study, FRAP and ORAC values were used in the calculation of total antioxidant intake of the diet. In healthy individuals, the relationship was found between the phytochemical index (DPİ) of the diet calculated from the 24-hour retrospective food consumption record and the phytochemical content detection tool data of the diet created (r=0.412; p<0,001). Iron ion-reducing antioxidant power calculated in the frequency of food consumption with phytochemical index determined from the nutrient consumption frequency survey that individuals responded to 1 (FRAP1) (r=0.475; p<0,001), iron ion reductive antioxidant power 2 (FRAP2) (r=0.527; p<0.001), capacity to absorb hydrophilic oxygen radical (HORAC) (r=0.536; p<0,001), lipophilic oxygen radical absorption capacity (LORAC) (r=0.438; p<0.001) and total oxygen radical absorption capacity (TORAC) (r=0.537; p<0,001) purchases were compared. Iron ion reductive antioxidant power calculated in the food consumption record with phytochemical index determined from the nutrient consumption frequency questionnaire answered by individuals 1 (FRAP1) (r=-0.131; p=0.014), iron ion reducing antioxidant power 2 (FRAP2) (r=0.-0.132; p=0.014), capacity to absorb hydrophilic oxygen radical (HORAC) (r=-0.107; p=0.046) and total oxygen radical absorbing capacity (TORAC) (r=-0.131; p=0.014) were correlated. In this study, a 24-hour retrospective food consumption record and the frequency of nutrient consumption developed to determine phytochemical content were applied to determine the nutritional status of individuals. When the comparison of energy and nutrient intakes determined between the nutrient consumption frequency survey and the nutrient consumption record answered by individuals was examined, it was determined that there was a statistically significant difference between both macro and micronutrient intakes.