Abstract
The objective of this study was to determine the effect of white potato cooking methods on subjective appetite, short-term food intake (FI), and glycemic response in healthy older adults. Using a within-subject, repeated-measures design, 20 participants (age: 70.4 ± 0.6 y) completed, in random order, five treatment conditions: three potato treatments (baked potatoes, mashed potatoes, and French fries), an isocaloric control treatment (white bread), or a fasting condition (meal skipping). Subjective appetite and glycemic response were measured for 120 min using visual analogue scales and capillary blood samples, respectively. Lunch FI was measured with an ad libitum pizza meal at 120 min. Change from baseline subjective appetite (p < 0.001) and lunch FI (p < 0.001) were lower after all test treatments compared with meal skipping (p < 0.001), but did not differ among test treatments. Cumulative FI (test treatment + lunch FI) did not differ among treatment conditions. Blood glucose concentrations were higher after all test treatments compared with meal skipping (p < 0.001), but were not different from each other. In healthy older adults, white potatoes suppressed subjective appetite and lunch FI compared with meal skipping, suggesting white potatoes do not bypass regulatory control mechanisms of FI.
Highlights
The number of older adults in the United States [1] and Canada [2] is expected to increase more rapidly than other age groups in the few decades
Twenty-two adults over 65 y completed the study; two participants were removed from analyses due to an outlier food intake (FI) data
Our findings showed no evidence for age-related declines in habitual motivation-to-eat in healthy older adults, as cumulative FI was similar compared with studies in children [17] and adults [18,19] employing similar study designs
Summary
The number of older adults in the United States [1] and Canada [2] is expected to increase more rapidly than other age groups in the few decades. Older adults are at a higher risk of adverse health outcomes associated with suboptimal dietary intake compared with young adults, in part, due to age-related changes in physiological, metabolic, and hormonal factors, which can affect components of energy balance [3,4,5,6]. Aging is associated with elevated satiety, diminished food intake (FI), incomplete caloric compensation, and impaired glycemic regulation [6,7], which likely contribute to the high prevalence of metabolic disorders associated with both overnutrition (e.g., obesity [8], type 2 diabetes [9]) and undernutrition (e.g., malnutrition) [3,4,10], the two opposing consequences of energy balance dysregulation. Daily consumption of non-fried potatoes for four weeks in adults did not have an adverse effect on blood glucose, body weight, or cardiometabolic markers [15]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
