Evidence map›Paper›PMID 30665439›Full record

Trial reportJournal of the International Society of Sports Nutrition2019

Effects of ascorbic acid supplementation on oxidative stress markers in healthy women following a single bout of exercise.

Manita Yimcharoen, Suwatsin Kittikunnathum, Chawannut Suknikorn, Wichuda Nak-On, Petcharee Yeethong, Tracy G Anthony, Piyawan Bunpo

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of the International Society of Sports Nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
7.0field-weighted citation impact, top 3% 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

30 citing papers in PubMed, 71 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

7 authors at 2 institutions in 2 countries.

Manita YimcharoenDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
Suwatsin KittikunnathumDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
Chawannut SuknikornDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
Wichuda Nak-OnDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
Petcharee YeethongDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.
Tracy G AnthonyDepartment of Nutritional Sciences, Rutgers University, New Brunswick, NJ, 08901, USA.
Piyawan BunpoDepartment of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand. pbunpo@gmail.com.ORCID http://orcid.org/0000-0001-9790-8530
Chiang Mai University · THRutgers, The State University of New Jersey · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAscorbic acid is a water-soluble chain breaking antioxidant. It scavenges free radicals and reactive oxygen species (ROS), which are produced during metabolic pathways. Exercise can produce an imbalance between ROS and antioxidants, leading to oxidative stress-related tissue damages. This study was designed to determine the effects of ascorbic acid supplementation on circulating biomarkers of oxidative stress and muscle damage following a single bout of exercise.

methodsIn a crossover design with a 1 wk. wash-out period, 19 healthy women performed 30 min moderate-intensity cycling after ingesting 1000 mg of ascorbic acid (AA) or placebo. Blood samples were taken immediately before, immediately after and 30 min post-exercise to determine plasma albumin, total protein, glucose, oxidative stress and muscle damage markers.

resultsPlasma albumin and total protein levels increased immediately after exercise in placebo alongside slight reductions in glucose (p = 0.001). These effects were absent in AA cohort. Ferric reducing ability of plasma and vitamin C levels in AA cohort significantly increased after exercise (p < 0.05). Superoxide dismutase activity was significantly elevated after exercise (p = 0.002) in placebo but not AA. Plasma malondialdehyde did not change after exercise in placebo but was significantly decreased in AA (p < 0.05). The exercise protocol promoted slight muscle damage, reflected in significant increases in total creatine kinase in all subjects after exercise. On the other hand, plasma C-reactive protein and lactate dehydrogenase remained unchanged.

conclusionSupplementation with ascorbic acid prior exercise improves antioxidant power but does not prevent muscle damage.

Indexed as

Dietary SupplementsExerciseOxidative StressAdultAscorbic AcidBiomarkersBlood GlucoseCatalaseC-Reactive ProteinCreatine KinaseCross-Over StudiesFemaleGlutathione PeroxidaseHumansL-Lactate DehydrogenaseMalondialdehydeAscorbic AcidBiomarkersBlood GlucoseCatalaseC-Reactive ProteinCreatine KinaseGlutathione PeroxidaseL-Lactate DehydrogenaseMalondialdehydeSuperoxide DismutaseThiobarbituric Acid Reactive SubstancesExerciseGlucoseInflammationMuscle damageOxidative stress markersVitamin C

Identifiers

PMID30665439
PMCPMC6341721
OpenAlexW2943150485

What Socratic holds

Textmetadata
LicenceCC BY
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 Socratic graph.