## 2 Materials and Methods
### Determination of oxLDL
#### 2.6.2 Anthropometric and Biochemical Parameters  
Assessment of participants included anthropometric measurements (body height (BH), bodyweight (BW), and waist and hip circumference), dietary methods (Food Frequency Questionnaire (FFQ)), and biochemical methods (determination of glucose, triglycerides, total cholesterol, HDL and LDL cholesterol, oxLDL receptor, and iron in blood/serum). Anthropometric measurements were performed at baseline to calculate body mass index (BMI = BW (kg)/BH\({}^{2}\) (m)), and waist-to-hip ratio (WHR). All necessary information about the study participants (age, level of education, number of people in the household, alcohol, medications, dietary supplements, allergy status, frequency of consumption of food prepared outside the home, and level of physical activity) was provided in the first section of the FFQ. The reference period for data collection was the month preceding the participation.  
Dietary intake was followed using the modified validated FFQ [30]. Foods were divided into nine categories (cereals, fruits, vegetables, dairy products, legumes, fats, nuts and seeds, sweets, and beverages). A Likert scale was used to determine frequencies and the following responses were possible: always (every day--5), often (three to five times a week--4), sometimes (once a week--3), rarely (once or twice a month--2), and never (1).  
All biochemical parameters were measured at the beginning of the study in the fasting state, while the oxLDL receptor was also measured 2 h after consumption of cookies, and after 10 days of the intervention. Glucose, iron, and lipid profile concentrations were measured with the Abbott Architect c8000 (Abbott Laboratories, Chicago, IL, USA) using the manufacturer's original reagents. The oxidized LDL receptor was determined using an enzyme-linked immunosorbent assay (ELISA) kit for lectin-like oxidized LDL receptor 1 (LOX1) (SEB859 Hu 96) (CLOUD-CLONE CORP., Houston, TX, USA) according to the manufacturer's instructions. Briefly, the method is a double antibody sandwich ELISA on wells precoated with a LOX1-specific antibody. After incubation of the standards and samples with the pre-coated wells, the next step was to add avidin conjugated to horseradish peroxidase followed by biotin-conjugated antibodies to each well. When the 3,3'5,5'-Tetramethylbenzidine substrate is added, the color of the wells changes only in the presence of LOX1. Sulfuric acid stops the reaction. The concentration of LOX1 in the samples is proportional to the color intensity measured at 450 nm. The detection range of the method is 12.5-800 pg/mL. The ELISA was performed manually, with automated washing steps on the Hydroflex Microplate Washer, and absorbance was measured on Infinite F50 Readers (Tecan Ltd., Mannedorf, Switzerland).  
The data collected from the subjects were kept confidential. Moreover, the names of the subjects were encrypted during the processing of the sample and the analysis of the results and were known only to the principal investigator. At the end of the study, all personal data and biological materials were disposed of appropriately. Approval for this research was granted by the Ethics Committee of the University Hospital Center Sestre Milosrdnice (251-29-11-21-01-9) and the Ethics Committee of the Faculty of Medicine, University of Zagreb (380-59-10106-21-111/122).