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Randomized Controlled Trial
. 2022 Jun;61(4):1849-1861.
doi: 10.1007/s00394-021-02747-1. Epub 2021 Dec 20.

A high-protein total diet replacement alters the regulation of food intake and energy homeostasis in healthy, normal-weight adults

Camila L P Oliveira  1   2 , Normand G Boulé  2   3 , Sarah A Elliott  1   4 , Arya M Sharma  5 , Mario Siervo  6 , Aloys Berg  7 , Sunita Ghosh  8 , Carla M Prado  9   10
Affiliations
Randomized Controlled Trial

A high-protein total diet replacement alters the regulation of food intake and energy homeostasis in healthy, normal-weight adults

Camila L P Oliveira et al. Eur J Nutr. 2022 Jun.

Abstract

Purpose: Dietary intake can affect energy homeostasis and influence body weight control. The aim of this study was to compare the impact of high-protein total diet replacement (HP-TDR) versus a control (CON) diet in the regulation of food intake and energy homeostasis in healthy, normal-weight adults.

Methods: In this acute randomized controlled, cross-over study, participants completed two isocaloric arms: a) HP-TDR: 35% carbohydrate, 40% protein, and 25% fat; b) CON: 55% carbohydrate, 15% protein, and 30% fat. The diets were provided for 32 h while inside a whole-body calorimetry unit. Appetite sensations, appetite-related hormones, and energy metabolism were assessed.

Results: Forty-three healthy, normal-weight adults (19 females) participated. Appetite sensations did not differ between diets (all p > 0.05). Compared to the CON diet, the change in fasting blood markers during the HP-TDR intervention was smaller for peptide tyrosine-tyrosine (PYY; - 18.9 ± 7.9 pg/mL, p = 0.02) and greater for leptin (1859 ± 652 pg/mL, p = 0.007). Moreover, postprandial levels of glucagon-like peptide 1 (1.62 ± 0.36 pM, p < 0.001) and PYY (31.37 ± 8.05 pg/mL, p < 0.001) were higher in the HP-TDR. Significant correlations were observed between energy balance and satiety (r = - 0.41, p = 0.007), and energy balance and PFC (r = 0.33, p = 0.033) in the HP-TDR.

Conclusion: Compared to the CON diet, the HP-TDR increased blood levels of anorexigenic hormones. Moreover, females and males responded differently to the intervention in terms of appetite sensations and appetite-related hormones.

Trial registration: NCT02811276 (retrospectively registered on 16 June 2016) and NCT03565510 (retrospectively registered on 11 June 2018).

Keywords: Appetite; Appetite-related hormones; Energy homeostasis; Protein; Total diet replacement.

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Conflict of interest statement

In addition to what was mentioned above, Camila L. P. Oliveira received travel fees from Almased Wellness GmbH. Arya M. Sharma and Carla M. Prado have received travel and speaker fees unrelated to this study. Aloys Berg has received consulting fees.

Figures

Fig. 1
Fig. 1
Overview of the experimental protocol. VO2 volume of oxygen, VCO2 volume of carbon dioxide, N nitrogen
Fig. 2
Fig. 2
Energy expenditure (panel a), macronutrient oxidation rates (panels b, c, and d), energy balance (panel e), and macronutrient balances (panels f, g, and h) during the CON and HP-TDR interventions. Values are mean (standard deviation). N = 43 (females N = 19; males N = 24). *Significant difference between the HP-TDR and CON diets, p < 0.01 as assessed by a mixed analysis of variance. CON control, HP-TDR high-protein total diet replacement. This data have been reported in detail elsewhere [27]
Fig. 3
Fig. 3
Interaction between diet and sex on 24-h AUC for PFC (p = 0.04). Data are presented as mean ± standard deviation. N = 43 (N = 19 females; N = 24 males). In females, the 24-h AUC for PFC was lower with the HP-TDR compared to the CON diet, p = 0.04 as assessed by a post hoc test for a mixed analysis of variance. In the HP-TDR diet, the 24-h AUC for PFC was lower in females compared to males, p = 0.05 as assessed by a post hoc test for a mixed analysis of variance. AUC area under the curve, CON control, HP-TDR high-protein total diet replacement, PFC prospective food consumption
See this image and copyright information in PMC

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