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Appl Physiol Nutr Metab. 2019 Apr 30. doi: 10.1139/apnm-2018-0887. [Epub ahead of print]

Role of single serving form of dairy on satiety and postprandial glycaemia in young and older healthy adults.

Author information

1
University of Toronto Faculty of Medicine, 12366, Nutritional Sciences , Medical Sciences Building , 1 King's College Circle , Toronto, Ontario, Canada , M5S 1A8 ; shirley.vien@utoronto.ca.
2
University of Toronto Faculty of Medicine, 12366, Nutritional Sciences, Toronto, Ontario, Canada ; hrvoje.fabek@utoronto.ca.
3
University of Toronto Faculty of Medicine, 12366, Nutritional Sciences, Toronto, Ontario, Canada ; yurie.yamagishi@mail.utoronto.ca.
4
University of Toronto Faculty of Medicine, 12366, Nutritional Sciences , 150 College Street , Room 329 , Toronto, Ontario, Canada , M5S 3E2 ; yingti.lee@mail.utoronto.ca.
5
Mount Saint Vincent University, 3684, Applied Human Nutrition, Halifax, Nova Scotia, Canada ; Bohdan.Luhovyy@msvu.ca.
6
University of Toronto Faculty of Medicine, 12366, Nutritional Sciences, Toronto, Ontario, Canada ; harvey.anderson@utoronto.ca.

Abstract

Dairy proteins reduce appetite and improve postprandial glycaemic response in adults. However, there are no reports of dairy in amounts usually consumed on satiety and postprandial glycaemia in either young or older adults. In a randomized crossover design, 30 healthy young adults (age: 23.5± 0.5 y; BMI: 21.8 ± 0.4 kg/m<sup>2</sup>) and 30 healthy/overweight older adults (age: 65.2 ± 0.5 y; BMI: 24.7 ± 0.6 kg/m<sup>2</sup>) consumed one serving (according to manufacturers' labels) of skim milk (0.1% M.F.), whole milk (3.25% M.F.), plain Greek yogurt (2% M.F.), cheddar cheese (31% M.F.), and water (energy-free control) after a 12 h fast. Subjective appetite was measured every 15-30 min over 3 h; blood glucose and insulin were measured at baseline and every 15-30 min over 2 h. All dairy treatments reduced post-treatment subjective appetite AUC over 3 h by 8-17% more than water. Greek yogurt reduced appetite 3 h AUC more than skim and whole milk by 9 and 7%, respectively (<i>p</i> < 0.0001). Post-treatment blood glucose 2 h AUC was 42% lower in young compared to older adults (<i>p</i> = 0.003). It was also 52-78% lower after cheese compared to milks and yogurt (<i>p</i> < 0.0001). Post-treatment insulin AUC after cheese was only 10-15% of that after milks and Greek yogurt (<i>p</i> < 0.0001). We conclude that single servings of dairy differ in effect on postprandial satiety and glycaemia and merit consideration in management of metabolic syndrome.

PMID:
31039320
DOI:
10.1139/apnm-2018-0887

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