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Open AccessArticle

Whey Protein Drink Ingestion before Breakfast Suppressed Energy Intake at Breakfast and Lunch, but Not during Dinner, and Was Less Suppressed in Healthy Older than Younger Men

1
Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide, Royal Adelaide Hospital, Adelaide, SA 5000, South-Australia, Australia
2
Riddet Institute, Massey University, Palmerston North 9430, New Zealand
3
Faculty of Health Sciences & Medicine, Bond University, Gold Coast 4229, Queensland, Australia
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(11), 3318; https://doi.org/10.3390/nu12113318
Received: 24 September 2020 / Revised: 24 October 2020 / Accepted: 27 October 2020 / Published: 29 October 2020
(This article belongs to the Special Issue Appetite and Satiety Control-Gut Mechanisms)
Ageing is associated with changes in feeding behavior. We have reported that there is suppression of energy intake three hours after whey protein drink ingestion in young, but not older, men. This study aimed to determine these effects over a time period of 9 h. Fifteen younger (27 ± 1 years, 25.8 ± 0.7 kg/m2) and 15 older (75 ± 2 years, 26.6 ± 0.8 kg/m2) healthy men were studied on three occasions on which they received, in a randomized order, a 30 g/120 kcal, 70 g/280 kcal whey-protein, or control (~2 kcal) drink. Ad-libitum energy intake (sum of breakfast, lunch, and dinner) was suppressed in a protein load responsive fashion (P = 0.001). Suppression was minimal at breakfast, substantial at lunch (~−16%, P = 0.001), no longer present by dinner, and was less in older than younger men (−3 ± 4% vs. −8 ± 4%, P = 0.027). Cumulative protein intake was increased in the younger and older men (+20% and +42%, P < 0.001). Visual analogue scale ratings of fullness were higher and desire to eat and prospective food consumption were lower after protein vs. control, and these effects were smaller in older vs. younger men (interaction effect P < 0.05). These findings support the use of whey-protein drink supplements in older people who aim to increase their protein intake without decreasing their overall energy intake. View Full-Text
Keywords: whey protein; energy intake; gastric emptying; appetite whey protein; energy intake; gastric emptying; appetite
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MDPI and ACS Style

Oberoi, A.; Giezenaar, C.; Clames, A.; Bøhler, K.; Lange, K.; Horowitz, M.; Jones, K.L.; Chapman, I.; Soenen, S. Whey Protein Drink Ingestion before Breakfast Suppressed Energy Intake at Breakfast and Lunch, but Not during Dinner, and Was Less Suppressed in Healthy Older than Younger Men. Nutrients 2020, 12, 3318.

AMA Style

Oberoi A, Giezenaar C, Clames A, Bøhler K, Lange K, Horowitz M, Jones KL, Chapman I, Soenen S. Whey Protein Drink Ingestion before Breakfast Suppressed Energy Intake at Breakfast and Lunch, but Not during Dinner, and Was Less Suppressed in Healthy Older than Younger Men. Nutrients. 2020; 12(11):3318.

Chicago/Turabian Style

Oberoi, Avneet; Giezenaar, Caroline; Clames, Alina; Bøhler, Kristine; Lange, Kylie; Horowitz, Michael; Jones, Karen L.; Chapman, Ian; Soenen, Stijn. 2020. "Whey Protein Drink Ingestion before Breakfast Suppressed Energy Intake at Breakfast and Lunch, but Not during Dinner, and Was Less Suppressed in Healthy Older than Younger Men" Nutrients 12, no. 11: 3318.

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