Cited by 285Dietary Effects on HealthCircadian rhythm and melatoninSleep and related disorders

Meal timing and obesity: interactions with macronutrient intake and chronotype

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Xiao, Qian, Garaulet, Marta, Scheer, Frank A. J. L.·2019·International Journal of Obesity

Abstract

Background Timing of dietary intake may play a role in obesity. However, previous studies produced mixed findings possibly due to inconsistent approaches to characterize meal timing and not taking into account chronotype and macronutrients. To address the aforementioned limitations, we have defined meal timing relative to sleep/wake timing, investigated the relationship between meal timing and body mass index (BMI) dependent on chronotype, and examined the associations.Methods BMI, chronotype, and dietary intakes were measured in 872 middle-to-older-aged adults by six 24-h dietary recalls in 1 year. We defined four time windows of intake relative to sleep timing: morning (within 2 h after getting out of bed), night (within 2 h before bedtime), and two midday periods in between (split by the midpoint of the waking period).Results A higher percent of total daily energy intake consumed during the morning window was associated with lower odds of being overweight or obese (odds ratio (95% confidence intervals), 0.53 (0.31, 0.89)). This association was stronger in people with an earlier chronotype (0.32 (0.16, 0.66)). A higher percent of total daily energy intake consumed during the night window was associated with higher odds of being overweight or obese (1.82 (1.07, 3.08)), particularly in people with a later chronotype (4.94 (1.61, 15.14)). These associations were stronger for the intakes of carbohydrates and protein than for fat intake.Conclusion Our study suggests that higher dietary consumption after waking up and lower consumption close to bedtime associate with lower BMI, but the relationship differs by chronotype. Furthermore, the data demonstrate a clear relationship between the timing of carbohydrate and protein intake and obesity. Our findings highlight the importance of considering timing of intake relative to sleep timing when studying the associations of meal timing with obesity and metabolic health.

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  • Xiao et al. revealed clear associations between carbohydrate and protein intake with obesity.

    “Xiao et al. (151) revealed clear associations between carbohydrate and protein intake with obesity”

    From Meal timing and its role in obesity and associated diseases (2024) · cites this paper as [151]

    The Discussion reports a clear relationship between the timing of carbohydrate and protein intake and obesity. The claim omits the timing qualifier: the reported associations differ between morning and night intake and by chronotype (Results, “Timing of macronutrient intake and BMI status”). (LLM, conf=0.88)

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Authors
Xiao, Q., Garaulet, M., & Scheer, F. A. J. L.
Affiliations
  • University of Iowa (US)
  • Universidad de Murcia (ES)
  • Brigham and Women's Hospital (US)
Corresponding author
  • Xiao, Qian
  • Scheer, Frank A. J. L.
Venue
International Journal of Obesity
Published
2019-01-31
Volume
43
Issue
9
Pages
1701-1711
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W2911801274
Cited by
285
References
30
Citations by year
2026: 23 · 2025: 33 · 2024: 64 · 2023: 43 · 2022: 49 · 2021: 41 · 2020: 23 · 2019: 8
FWCI
20.74
Type
journal article
Language
en
Open access
Locations
  • International Journal of Obesity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL140574, R01HL118601, R01HL094806)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK099512, R01DK105072, R01DK102696)
Topics
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
meal timing, obesity, chronotype, macronutrient intake, body mass index, sleep timing, carbohydrate intake, protein intake, dietary fat intake
MeSH terms
Nutrients, Aged, Energy Intake, Circadian Rhythm, Feeding Behavior, Female, Humans, Male, Middle Aged, Obesity, Sleep, Cohort Studies, Body Mass Index, Meals

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