Beslenme ve Diyetetik Bölümü Koleksiyonu
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- ItemEnvironmental impact of athletes’ diets greenhouse gas emissions, water footprint, and sustainability awareness(Springer, 2026-01) Acar, Selva; Tuna, Tuğba; Ersoy, Nesli; 336342This cross-sectional study evaluated the environmental impact of athletes’ dietary patterns by estimating greenhouse gas emissions (GHGE) and water footprint (WF). It also assessed knowledge, attitudes, and behaviors related to sustainable nutrition using a structured questionnaire aligned with the FAO definition of sustainable diets. Conducted between January and August 2023 in Ankara, the study included 100 elite athletes (mean age: 21.0 ± 3.3 years; 65% female) from various sports disciplines. Dietary intake was assessed using a semi-quantitative food frequency questionnaire, and GHGE and WF values were calculated based on life cycle assessment data. The mean GHGE and WF values of athletes’ diets were 3017.1 ± 1877.4 g CO₂-eq/day and 5.4 ± 3.2 mL/g, respectively. Male athletes and strength/power athletes exhibited significantly higher dietary environmental impacts than female and team sports athletes (p < 0.001 and p < 0.05, respectively). Red meat and animal protein consumption were strongly associated with higher GHGE and WF values (p < 0.001). Despite the increasing importance of sustainability, more than 90% of participants lacked accurate knowledge of sustainable nutrition. Moreover, a discrepancy was observed between athletes’ stated willingness to support environmental values and their actual food choices, indicating an intention–behavior gap. This study contributes to the limited literature by quantifying the environmental impact of athletes’ diets while concurrently examining sustainability-related behavioral factors. The findings underscore the importance of integrating sustainability principles into sports nutrition planning and education to reduce environmental impacts while maintaining performance goals.
- ItemThe Relationship Between Climate Change Awareness, Sustainable Nutrition Behaviours and Acceptability of Alternative Protein Sources in Generation Z: A Cross-Sectional Study(Wiley, 2026-01) Tuna, Tuğba; Batu, Zehra; 336342This study investigates the relationship between climate change awareness, sustainable nutrition behaviours, and the acceptability of alternative protein sources among Generation Z university students. This cross-sectional study employed a mixed-methods approach, combining structured quantitative measures and open-ended qualitative questions in a digital survey. A total of 785 university students aged 18–29 from Türkiye participated in the study. The survey included the Behavioural Scale for Sustainable Nutrition, the Global Climate Change Awareness Scale, and the Attitudes Toward Alternative Protein Sources Questionnaire. Descriptive statistics, independent t-tests, one-way ANOVA, post hoc Tukey HSD tests, and correlation analyses (Pearson/Spearman) were conducted to examine the associations between climate change awareness, sustainable nutrition behaviours, and the acceptability of alternative protein sources, including edible mushrooms, algae, flowers, grasshoppers, crickets, and cultured meat. A statistically significant but moderate positive relationship was observed between climate change awareness and sustainable nutrition behaviours, particularly in food purchasing habits. A weaker but positive association was found for food preference, food waste reduction, and seasonal and local dietary practices. Participants reported low familiarity with alternative protein sources, with the highest acceptability for edible mushrooms (74.5%), followed by edible flowers (37.8%) and cultured meat (14.4%). While greater climate change awareness was linked to a higher willingness to consume certain alternative protein sources, this did not consistently translate into broader acceptance. These findings highlight the need for targeted awareness campaigns and educational initiatives to overcome cultural barriers and food neophobia, fostering a greater acceptance of sustainable protein sources.
- ItemThe role of chronotype, sleep quality, and physical activity in food cravings: a crosssectional study(BMC, 2025-07) Tuna, Tuğba; Karaca Çelik, Kezban Esen; Çelik Kayapınar, Fatma; 336342Introduction Food cravings contribute to unhealthy eating behaviors, increased energy intake, and metabolic disturbances. However, the interplay between chronotype, sleep quality, and physical activity in shaping food cravings remains unclear. This study explores these associations in adults attending fitness centers. Methods A cross-sectional study was conducted with 201 participants (80 females, 121 males) aged 19–64 years in İzmir, Türkiye. Validated tools, including the Food Craving Questionnaire-Trait (FCQ-T), Morningness–Eveningness Questionnaire (MEQ), and Pittsburgh Sleep Quality Index (PSQI), were used to assess food cravings, chronotype, and sleep quality, respectively. Results Regular physical activity was significantly associated with lower FCQ-T scores (p < 0.05). Poor sleep quality was linked to higher food craving levels (p < 0.05). Evening chronotypes showed higher food craving scores than morning types, though this was not statistically significant (p > 0.05). However, evening chronotypes exhibited significantly poorer sleep quality (higher PSQI scores) compared to morning types (p < 0.05). Conclusion This cross-sectional study suggests that regular physical activity and good sleep quality may be associated with lower food craving levels. Although chronotype differences were observed, further research is needed to clarify the underlying mechanisms. Given the limitations of the study design and potential selection bias, causal interpretations should be approached with caution. Nevertheless, interventions focusing on improving sleep and promoting physical activity may help reduce unhealthy eating tendencies in similar populations.
- ItemEvaluation of Nutritional Recommendations Provided by the ChatGPT Language Model to Bariatric Surgery Patients(Sciendo, 2025-03) Kumru Yildirim, Merve; Bayam, Hikmet; Yildiz, Nida; Gök Kahraman, Fatma; Acar, Nazli; 256218ChatGPT is recognized as a promising tool in healthcare by providing continuous support, quick accessibility, and personalized guidance for weight management [1]. In the field of bariatrics, the potential of ChatGPT in post-surgery weight management and nutrition is particularly noteworthy. In a study, the accuracy of the model’s general responses to bariatric questions was confirmed; however, the reliability of its responses to nutrition-specific issues has not yet been examined [2]. In this study, the aim is to evaluate the nutritional recommendations provided by the ChatGPT language model for patients following bariatric surgery through expert dietitians. This study was designed as a cross-sectional study. The responses provided by the free version of the ChatGPT 3.5 were evaluated by three experts in bariatric surgery. Initially, frequently asked postoperative nutrition questions were identified based on input from three experts who consult bariatric patients. This process led to the creation of 27 questions, which were then posed to ChatGPT in Turkish, with responses recorded immediately. For evaluation, responses were categorized as: '1: consistent with the guidelines', '2: consistent but incomplete', '3: consistent but contradictory', and '4: inconsistent'. The responses were assessed by two experts, with a third expert reviewing any disagreements.
- ItemNörodejeneratif hastalıkların önlenmesinde k vitamininin potansiyel rolü(Hatiboğlu Yayıncılık, 2024) Tuna, Tuğba; Ayaz, Aylin; 336342; Muhittin, Tayfur
