Evidence map›Paper›PMID 30997492›Full record

Trial reportThe American journal of clinical nutrition2019

The effect of high compared with low dairy consumption on glucose metabolism, insulin sensitivity, and metabolic flexibility in overweight adults: a randomized crossover trial.

Coby Eelderink, Susan Rietsema, Iris M Y van Vliet, Larissa C Loef, Theo Boer, Martijn Koehorst, Ilja M Nolte, Ralf Westerhuis, Cécile M Singh-Povel, Jan M W Geurts and 2 more

Abstract readComparative StudyRandomized Controlled Trial
In one paragraph

Trial report in The American journal of clinical nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

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  5. Delayed and diminished postprandial lactate shuttling in healthy older men and women.American journal of physiology. Endocrinology and metabolism · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Coby EelderinkDepartment of Internal Medicinecal.
Susan RietsemaDepartment of Internal Medicinecal.
Iris M Y van VlietDepartment of Dietetics.
Larissa C LoefDepartment of Internal Medicinecal.
Theo BoerDepartment of Laboratory Medicine.
Martijn KoehorstDepartment of Laboratory Medicine.
Ilja M NolteDepartment of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Ralf WesterhuisDialysis Center Groningen, Groningen, The Netherlands.
Cécile M Singh-PovelDepartment of Nutritional Sciences, FrieslandCampina, Amersfoort, The Netherlands.
Jan M W GeurtsDepartment of Nutritional Sciences, FrieslandCampina, Amersfoort, The Netherlands.
Eva CorpeleijnDepartment of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Stephan J L BakkerDepartment of Internal Medicinecal.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDairy products contain many nutritious components that may benefit metabolic health. There are indications that glucose metabolism and insulin sensitivity, which are generally disturbed in overweight and obese individuals, may improve by increased dairy intake. This may also affect one's metabolic flexibility.

objectiveThe aim of this study was to investigate the effects of high compared with low dairy intake on glucose metabolism, insulin sensitivity, and metabolic flexibility in overweight adults (aged 45-65 y).

methodsIn this randomized intervention study, subjects consumed a high- and a low-dairy diet [HDD (5-6 dairy portions) and LDD (≤1 dairy portion), respectively] for 6 wk in a crossover design, with a washout period of 4 wk. Dairy portions were 200 g semi-skimmed yoghurt, 30 g reduced-fat (30+) cheese, and 250 mL semiskimmed milk and buttermilk. After 6 wk, a 75-g oral-glucose-tolerance test (13C-labeled) and a subsequent fasting challenge were performed. Metabolic flexibility was studied by determining the respiratory quotient (RQ) using indirect calorimetry. Fasting and postprandial plasma concentrations of glucose and insulin were analyzed. The dual isotope technique enabled calculation of glucose kinetics.

resultsThe study was completed by 45 overweight men and postmenopausal women [age 58.9 ± 4.3 y, BMI 27.9 ± 1.9 kg/m2 (mean ± SD)]. Fasting RQ and ΔRQ, reflecting metabolic flexibility, did not differ after both diets. Fasting glucose concentrations were similar, whereas fasting insulin concentrations were lower after the LDD (LDD: 8.1 ± 2.8 mU/L; HDD: 8.9 ± 3.3 mU/L; P = 0.024). This resulted in a higher HOMA-IR after the HDD (P = 0.027). Postprandial glucose and insulin responses as well as glucose kinetics were similar after both diets.

conclusionsThe amount of dairy intake during a 6-wk period had a neutral effect on metabolic flexibility or postprandial glucose metabolism in middle-aged overweight subjects. More trials are needed to study the effects of specific dairy types and to differentiate between metabolic subgroups. This trial was registered at trialregister.nl as NTR4899.

Indexed as

Dairy ProductsFemaleGlucoseHumansInsulinInsulin ResistanceMaleMiddle AgedOverweightPostprandial PeriodGlucoseInsulindairydiabetesglucose kineticsmetabolic flexibilityoverweight

Identifiers

PMID30997492
PMCPMC6537937

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.