In this pandemic-framed period of social distancing, a study on buffets may seem quaint at best. Hopefully, there will come a time in the not so distant future when buffets can be a part of our lives again.
Research suggests stomach capacity in obesity changes to accommodate different eating situations, which has an effect on feelings of fullness and the urge to overeat. The study is published in the American Journal of Physiology-Gastrointestinal and Liver Physiology.
Studies have found that people with obesity have a greater gastric volume (stomach capacity) compared with those with a lower body mass index. Physical, genetic and social factors are just a few components that influence eating behavior, which includes the desire to stop eating due to fullness (satiety) and the physical state of fullness (satiation). The associations between stomach capacity—while fasting and after eating—and both satiety and satiation are unclear.
Health Secrets of a SuperAger 
When I was younger I could adjust my eating capacity depending on the venue. Never was obese though according to the body mass indicator I was generally 10 pounds overweight. Now in retirement I am not overweight with a few pounds to spare.
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Which comes first, the larger stomach capacity or overeating?
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Since the individuals are obese, one would guess the overeating.
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