73G-37 |
A 30 day closed space diet study |
A. A. OLABI1, J. B. Hunter2, D. A. Levitsky3, R. Spies4, and A. P. Rovers3. (1) Dept. of Food Science, Cornell University, Stocking Hall, Ithaca, NY 14853, (2) Dept. of Agricultural and Biological Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, (3) Dept. of Nutritional Sciences, Cornell University, Savage Hall, Ithaca, NY 14853, (4) School of Hotel Administration, Cornell University, Statler Hall, Ithaca, NY 14853 The relationship between a taste session and long term-sustained acceptability or consumption has always been of importance to sensory scientists. This work provided the opportunity of assessing these relationships with a vegan diet designed for a self-sustaining Mars surface colony. Our objectives were: first to assess the relationship between a one-time taste session hedonic assessment and both the acceptability of foods when consumed repeatedly in the context of a vegan diet and the consumption of these foods. A second objective was to observe any effects of a novel vegan diet on the study's participants. The acceptability of previously developed and tested foods was assessed in the context of a closed 30-day diet study consisting of 3 similar 10-day menu cycles. A weekly mood questionnaire was administered to the 16 subjects of the study and to a control group. The subjects' weights were also monitored as well as their acceptability ratings and consumption of the different foods. The correlation between the previous taste session acceptability and the in-study food intake was 63.7%. The correlation between the in-study acceptability and the in-study food intake was 66.5%. However, the correlation between the taste session acceptability and the in-study acceptability was only 43.4%. The study revealed no effect of the diet on mood. Subjects lost a statistically significant amount of weight, on average 3.75 lbs. A small weight loss is common in similar studies. Consumption of breakfast and lunch foods increased with time and was significantly higher on weekends vs. weekdays. The nutritional profile of the diet was satisfactory with the exception of its low calcium level and high fiber level. This study showed that a one time hedonic assessment could provide a fairly satisfactory prediction of future consumption in the case of a vegan "space diet".
Session 73G, Sensory Evaluation
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