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Increased fruit and vegetable intake has no discernible effect on weight loss: a systematic review and meta-analysis1234

Identifieur interne : 000E81 ( Ncbi/Merge ); précédent : 000E80; suivant : 000E82

Increased fruit and vegetable intake has no discernible effect on weight loss: a systematic review and meta-analysis1234

Auteurs : Kathryn A. Kaiser ; Andrew W. Brown ; Michelle M. Bohan Brown ; James M. Shikany ; Richard D. Mattes ; David B. Allison

Source :

RBID : PMC:4095660

Abstract

Background: A common dietary recommendation for weight loss, especially in lay public outlets, is to eat more fruit and vegetables (F/Vs). Without a compensatory reduction in total energy intake, significant weight loss would be unlikely.

Objective: We aimed to synthesize the best available evidence on the effectiveness of the general recommendation to eat more F/Vs for weight loss or the prevention of weight gain.

Design: We searched multiple databases for human randomized controlled trials that evaluated the effect of increased F/V intake on body weight. Inclusion criteria were as follows: ≥15 subjects/ treatment arm, ≥8-wk intervention, a stated primary or secondary outcome of body weight, the stated goal of the intervention was weight or fat loss or the prevention of weight or fat gain, and food intake provided or prescribed was of a variety of F/Vs that remained minimally processed.

Results: Two studies met all criteria; 5 other studies met all criteria but one. The primary analysis indicated an effect size of weight change (outcome of interest) from baseline [standardized mean difference (SMD) for studies that met all criteria] of −0.16 (95% CI: −0.78, 0.46) (P = 0.60). The SMD for 7 studies that met all or most criteria was 0.04 (95% CI: −0.10, 0.17) (P = 0.62).

Conclusions: Studies to date do not support the proposition that recommendations to increase F/V intake or the home delivery or provision of F/Vs will cause weight loss. On the basis of the current evidence, recommending increased F/V consumption to treat or prevent obesity without explicitly combining this approach with efforts to reduce intake of other energy sources is unwarranted. This systematic review and meta-analysis was registered at http://www.crd.york.ac.uk/PROSPERO/ as CRD42013004688


Url:
DOI: 10.3945/ajcn.114.090548
PubMed: 24965308
PubMed Central: 4095660

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PMC:4095660

Le document en format XML

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<name sortKey="Shikany, James M" sort="Shikany, James M" uniqKey="Shikany J" first="James M" last="Shikany">James M. Shikany</name>
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<div type="abstract" xml:lang="en">
<p>
<bold>Background: </bold>
A common dietary recommendation for weight loss, especially in lay public outlets, is to eat more fruit and vegetables (F/Vs). Without a compensatory reduction in total energy intake, significant weight loss would be unlikely.</p>
<p>
<bold>Objective:</bold>
We aimed to synthesize the best available evidence on the effectiveness of the general recommendation to eat more F/Vs for weight loss or the prevention of weight gain.</p>
<p>
<bold>Design:</bold>
We searched multiple databases for human randomized controlled trials that evaluated the effect of increased F/V intake on body weight. Inclusion criteria were as follows: ≥15 subjects/ treatment arm, ≥8-wk intervention, a stated primary or secondary outcome of body weight, the stated goal of the intervention was weight or fat loss or the prevention of weight or fat gain, and food intake provided or prescribed was of a variety of F/Vs that remained minimally processed.</p>
<p>
<bold>Results: </bold>
Two studies met all criteria; 5 other studies met all criteria but one. The primary analysis indicated an effect size of weight change (outcome of interest) from baseline [standardized mean difference (SMD) for studies that met all criteria] of −0.16 (95% CI: −0.78, 0.46) (
<italic>P</italic>
= 0.60). The SMD for 7 studies that met all or most criteria was 0.04 (95% CI: −0.10, 0.17) (
<italic>P</italic>
= 0.62).</p>
<p>
<bold>Conclusions: </bold>
Studies to date do not support the proposition that recommendations to increase F/V intake or the home delivery or provision of F/Vs will cause weight loss. On the basis of the current evidence, recommending increased F/V consumption to treat or prevent obesity without explicitly combining this approach with efforts to reduce intake of other energy sources is unwarranted. This systematic review and meta-analysis was registered at http://www.crd.york.ac.uk/PROSPERO/ as CRD42013004688</p>
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<journal-id journal-id-type="nlm-ta">Am J Clin Nutr</journal-id>
<journal-id journal-id-type="iso-abbrev">Am. J. Clin. Nutr</journal-id>
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<journal-title>The American Journal of Clinical Nutrition</journal-title>
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<article-id pub-id-type="doi">10.3945/ajcn.114.090548</article-id>
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<subject>Nutritional Status, Dietary Intake, and Body Composition</subject>
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<article-title>Increased fruit and vegetable intake has no discernible effect on weight loss: a systematic review and meta-analysis
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<surname>Kaiser</surname>
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<name>
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<given-names>Andrew W</given-names>
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<surname>Bohan Brown</surname>
<given-names>Michelle M</given-names>
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<name>
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<given-names>James M</given-names>
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<aff id="aff1">
<label>1</label>
From the Office of Energetics, School of Public Health (KAK, AWB, and DBA), the Nutrition Obesity Research Center (KAK, AWB, MMBB, JMS, and DBA), the Department of Nutrition, School of Health Professions (MMBB), and the Division of Preventive Medicine, School of Medicine (JMS), University of Alabama at Birmingham, Birmingham, AL, and the Department of Nutrition Science, Purdue University, West Lafayette, IN (RDM).</aff>
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<author-notes>
<fn id="fn1">
<label>2</label>
<p>The opinions expressed are those of the authors and not necessarily those of the NIH or any other organization. The authors had sole discretion of the design, conduct and results reported. </p>
</fn>
<fn id="fn2">
<label>3</label>
<p>Supported by the University of Alabama at Birmingham Nutrition Obesity Research Center grants P30DK056336,
<funding-source>NIH</funding-source>
<award-id>T32DK062710</award-id>
.</p>
</fn>
<corresp id="cor1">
<label>4</label>
Address reprint requests and correspondence to DB Allison, Dean's Office, Office of Energetics, Ryals Public Health Building 140J, 1720 Second Avenue South, Birmingham, AL 35294-0022. E-mail:
<email xlink:type="simple">dallison@uab.edu</email>
.</corresp>
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<pmc-comment>Fake ppub date generated by PMC from publisher pub-date/@pub-type='epub-ppub' </pmc-comment>
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<month>6</month>
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<pmc-comment> PMC Release delay is 12 months and 0 days and was based on the . </pmc-comment>
<volume>100</volume>
<issue>2</issue>
<fpage>567</fpage>
<lpage>576</lpage>
<history>
<date date-type="received">
<day>21</day>
<month>4</month>
<year>2013</year>
</date>
<date date-type="accepted">
<day>28</day>
<month>5</month>
<year>2014</year>
</date>
</history>
<permissions>
<copyright-statement>© 2014 American Society for Nutrition</copyright-statement>
<copyright-year>2014</copyright-year>
</permissions>
<abstract>
<p>
<bold>Background: </bold>
A common dietary recommendation for weight loss, especially in lay public outlets, is to eat more fruit and vegetables (F/Vs). Without a compensatory reduction in total energy intake, significant weight loss would be unlikely.</p>
<p>
<bold>Objective:</bold>
We aimed to synthesize the best available evidence on the effectiveness of the general recommendation to eat more F/Vs for weight loss or the prevention of weight gain.</p>
<p>
<bold>Design:</bold>
We searched multiple databases for human randomized controlled trials that evaluated the effect of increased F/V intake on body weight. Inclusion criteria were as follows: ≥15 subjects/ treatment arm, ≥8-wk intervention, a stated primary or secondary outcome of body weight, the stated goal of the intervention was weight or fat loss or the prevention of weight or fat gain, and food intake provided or prescribed was of a variety of F/Vs that remained minimally processed.</p>
<p>
<bold>Results: </bold>
Two studies met all criteria; 5 other studies met all criteria but one. The primary analysis indicated an effect size of weight change (outcome of interest) from baseline [standardized mean difference (SMD) for studies that met all criteria] of −0.16 (95% CI: −0.78, 0.46) (
<italic>P</italic>
= 0.60). The SMD for 7 studies that met all or most criteria was 0.04 (95% CI: −0.10, 0.17) (
<italic>P</italic>
= 0.62).</p>
<p>
<bold>Conclusions: </bold>
Studies to date do not support the proposition that recommendations to increase F/V intake or the home delivery or provision of F/Vs will cause weight loss. On the basis of the current evidence, recommending increased F/V consumption to treat or prevent obesity without explicitly combining this approach with efforts to reduce intake of other energy sources is unwarranted. This systematic review and meta-analysis was registered at http://www.crd.york.ac.uk/PROSPERO/ as CRD42013004688</p>
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