Evidence map›Paper›PMID 34488026›Full record

SynthesisRedox biology2021

Does timing of phytonutrient intake influence the suppression of postprandial oxidative stress? A systematic literature review.

Margaret Murray, Sophie Selby-Pham, Beau-Luke Colton, Louise Bennett, Gary Williamson, Aimee L Dordevic

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in Redox biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.7field-weighted citation impact, top 38% of its field
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

7 citing papers in PubMed, 11 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

Margaret MurraySchool of Chemistry, Monash University, Clayton, 3800, Victoria, Australia; Department of Nutrition, Dietetics & Food, Monash University, Notting Hill, 3168, Victoria, Australia. Electronic address: margaret.murray@monash.edu.
Sophie Selby-PhamSchool of Chemistry, Monash University, Clayton, 3800, Victoria, Australia. Electronic address: sophie.selby-pham@monash.edu.
Beau-Luke ColtonDepartment of Nutrition, Dietetics & Food, Monash University, Notting Hill, 3168, Victoria, Australia. Electronic address: beau.colton@gmail.com.
Louise BennettSchool of Chemistry, Monash University, Clayton, 3800, Victoria, Australia. Electronic address: louise.bennett1@monash.edu.
Gary WilliamsonDepartment of Nutrition, Dietetics & Food, Monash University, Notting Hill, 3168, Victoria, Australia. Electronic address: gary.williamson1@monash.edu.
Aimee L DordevicDepartment of Nutrition, Dietetics & Food, Monash University, Notting Hill, 3168, Victoria, Australia. Electronic address: aimee.dordevic@monash.edu.
Monash University · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPostprandial oxidative stress markers in blood are generated transiently from various tissues and cells following high-fat and/or high-carbohydrate (HFHC) meals, and may be suppressed by certain phytonutrients, such as polyphenols and carotenoids. However, the transient presence of phytonutrients in circulation suggests that timing of consumption, relative to the meal, could be important. This systematic review investigates the effect of timing of phytonutrient intake on blood markers of postprandial oxidative processes.

methodEMBASE, Medline, Scopus and Web of Science were searched up to December 2020. Eligible studies met the criteria: 1) healthy human adults; 2) phytonutrient(s) consumed in solid form within 24 h of a HFHC meal; 3) postprandial measurements of oxidative stress or antioxidants in blood; and 4) controlled study design. Cohen's d effect sizes were calculated to compare studies.

resultsNine studies, involving 256 participants, were included. Phytonutrients were consumed either at the same time, 1 h before, or the day (>12 h) before a HFHC meal. Significant decreases in blood markers - plasma lipid hydroperoxides, plasma malondialdehyde, serum sNox2-dp, serum 8-iso-PGF2α, platelet p47

conclusionPhytonutrients consumed with a HFHC meal significantly suppressed some markers of oxidative stress in blood. Although there were only a limited number of studies, it appears that suppression appeared effective at the time of peak phytonutrient concentration in plasma. However, further studies are required to confirm the observations and systematically optimise the effect of timing.

Indexed as

Oxidative StressPostprandial PeriodAntioxidantsCross-Over StudiesHumansMalondialdehydePhytochemicalsAntioxidantsMalondialdehydePhytochemicalsAntioxidantHumanOxidative stressPhytochemicalPhytonutrientPostprandial

Identifiers

PMID34488026
PMCPMC8426566
OpenAlexW3196521935

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.