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Co-Ingestion of Whey Protein with a Carbohydrate-Rich Breakfast Does Not Affect Glycemia, Insulinemia or Subjective Appetite Following a Subsequent Meal in Healthy Males

Lookup NU author(s): Dr Dean AllertonORCiD, Dr Daniel WestORCiD, Professor Emma StevensonORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

We aimed to assess postprandial metabolic and appetite responses to a mixed-macronutrient lunch following prior addition of whey protein to a carbohydrate-rich breakfast. Ten healthy males (age: 24 +/- 1 years; body mass index (BMI): 24.5 +/- 0.7 kg/m(2)) completed three trials in a non-isocaloric, crossover design. A carbohydrate-rich breakfast (93 g carbohydrate; 1799 kJ) was consumed with (CHO + WP) or without (CHO) 20 g whey protein isolate (373 kJ), or breakfast was omitted (NB). At 180 min, participants consumed a mixed-macronutrient lunch meal. Venous blood was sampled at 15 min intervals following each meal and every 30 min thereafter, while subjective appetite sensations were collected every 30 min throughout. Post-breakfast insulinemia was greater after CHO + WP (time-averaged area under the curve (AUC(0-180 min)): 193.1 +/- 26.3 pmol/L), compared to CHO (154.7 +/- 18.5 pmol/L) and NB (46.1 +/- 8.0 pmol/L; p < 0.05), with no difference in post-breakfast (0-180 min) glycemia (CHO + WP, 3.8 +/- 0.2 mmol/L; CHO, 4.2 +/- 0.2 mmol/L; NB, 4.2 +/- 0.1 mmol/L; p = 0.247). There were no post-lunch (0-180 min) effects of condition on glycemia (p = 0.492), insulinemia (p = 0.338) or subjective appetite (p > 0.05). Adding whey protein to a carbohydrate-rich breakfast enhanced the acute postprandial insulin response, without influencing metabolic or appetite responses following a subsequent mixed-macronutrient meal.

Publication metadata

Author(s): Allerton DM, Campbell MD, Gonzalez JT, Rumbold PLS, West DJ, Stevenson EJ

Publication type: Article

Publication status: Published

Journal: Nutrients

Year: 2016

Volume: 8

Issue: 3

Online publication date: 25/02/2016

Acceptance date: 16/02/2016

Date deposited: 25/07/2016

ISSN (electronic): 2072-6643

Publisher: MDPI AG

URL: http://dx.doi.org/10.3390/nu8030116

DOI: 10.3390/nu8030116

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