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Clinical Studies and Practice

Meal timing effects on insulin sensitivity and intrahepatic triglycerides during weight loss

International Journal of Obesity volume 42, pages 156–162 (2018)Cite this article

Subjects

Abstract

Background:

Several human and rodent studies suggest that in addition to the amount of energy consumed, timing of food intake contributes to body weight regulation. Consuming most energy in the morning has favorable effects on weight loss and weight maintenance. Whether this also affects glucose metabolism and liver fat independently from weight loss is unknown.

Objective:

We hypothesized that during weight loss, consuming most energy in the morning improves insulin sensitivity and reduces hepatic fat content more than consuming most energy in the evening.

Methods:

Twenty-three obese insulin resistant men (age 59.9±7.9 years, body mass index 34.4±3.8 kg m−2) followed a 4-week hypocaloric diet intervention with either 50% of daily energy consumed in the morning (BF group) or evening (D group). Insulin sensitivity, measured with a two-step hyperinsulinemic euglycemic clamp using a glucose tracer, intrahepatic triglycerides (IHTG), measured using magnetic resonance spectroscopy, and resting energy expenditure (REE) were assessed before and after the diet intervention.

Results:

Meal macronutrient composition and weight loss (6.5±1.5% vs 6.2±1.9%, respectively, P=0.70) did not differ between the BF and D groups. Endogenous glucose production (P⩽0.001), hepatic and peripheral insulin sensitivity (P=0.002; P=0.001, respectively) as well as IHTG content (P⩽0.001) all significantly improved with weight loss, but were not different between the BF and D groups. In addition, both groups decreased REE and respiratory quotient equally.

Conclusions:

During weight loss, consuming most energy in the morning instead of the evening does not have additional beneficial effects on insulin sensitivity and IHTG content. These results do not support weight independent effects of meal timing on glucose metabolism and IHTG in hypocaloric conditions in obese men.

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Acknowledgements

We acknowledge our research assistant Martine van Vessem for help with the clamps. This research was supported by the Dutch Technology Foundation STW (Perspective grant OnTime project 12189), which is part of the Netherlands Organization for Scientific Research (NWO), and which is partly funded by the Ministry of Economic Affairs.

Author contributions

RV, MS and SF designed research; RV conducted the research; RV, AN and MT analyzed the data; RV wrote the paper; and SF and MS had primary responsibility for the final content. All authors read and approved the final manuscript.

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Author notes

  1. M J Serlie and S E la Fleur: These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Endocrinology & Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands

    R I Versteeg, E Fliers, M J Serlie & S E la Fleur

  2. Department of Clinical Chemistry, Laboratory of Endocrinology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands

    M T Ackermans

  3. Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands

    A J Nederveen

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  1. R I Versteeg
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Correspondence to M J Serlie or S E la Fleur.

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Competing interests

MS serves on the advisory board of Fresenius Kabi Netherlands (Zeist, The Netherlands). The remaining authors declare no conflict of interest.

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Versteeg, R., Ackermans, M., Nederveen, A. et al. Meal timing effects on insulin sensitivity and intrahepatic triglycerides during weight loss. Int J Obes 42, 156–162 (2018). https://doi.org/10.1038/ijo.2017.199

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