Evidence map›Paper›PMID 28577257›Full record

SynthesisSports medicine (Auckland, N.Z.)2017

Effects of Vitamin D Supplementation on Serum 25-Hydroxyvitamin D Concentrations and Physical Performance in Athletes: A Systematic Review and Meta-analysis of Randomized Controlled Trials.

Forough Farrokhyar, Gayathri Sivakumar, Katey Savage, Alex Koziarz, Sahab Jamshidi, Olufemi R Ayeni, Devin Peterson, Mohit Bhandari

Registry-linked trialAbstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Sports medicine (Auckland, N.Z.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07748650 (The Effects of Vitamin D Supplements on Sports Performance of Female Indoor Elite Athletes), which is not on this map. Cited by 44 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 7 pooled it
5.9field-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.

NCT07748650 nacompletednot on this mapstarted 2021, after this paper: background citation

The Effects of Vitamin D Supplements on Sports Performance of Female Indoor Elite Athletes: a Randomized Double-blind Controlled Study

TypeinterventionalSponsorFu Jen Catholic University HospitalRan2021 to 2022Enrolled37ConditionsFemale Indoor AthletesArmsCholecalciferol (Vit D3), Calcium & Vitamine D3, Placebo
3 · Its place in the literature

Who cites it

44 citing papers in PubMed, 7 syntheses or guidelines pooled it, 76 citations in OpenAlex.

  1. Pooled it
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  3. How Do Male Football Players Meet Dietary Recommendations? A Systematic Literature Review.International journal of environmental research and public health · 2022
    Pooled it
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  7. Pooled it
  8. Trial
  9. Review
  10. Article
  11. Article
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  15. Article
  16. Review
  17. Nutritional Considerations for the Vegan Athlete.Advances in nutrition (Bethesda, Md.) · 2023
    Review
  18. Article
  19. Review
  20. Vitamin D deficiency in athletes: Laboratory, clinical and field integration.Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology · 2022
    Review
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

8 authors at 4 institutions in 2 countries.

Forough FarrokhyarDepartment of Surgery, McMaster University, Hamilton, ON, Canada. farrokh@mcmaster.ca.ORCID http://orcid.org/0000-0001-9928-9016
Gayathri SivakumarUniversity of Western Ontario, London, ON, Canada.
Katey SavageDepartment of Surgery, McMaster University, Hamilton, ON, Canada.
Alex KoziarzDepartment of Surgery, McMaster University, Hamilton, ON, Canada.
Sahab JamshidiVictoria Hospital, Castries, Saint Lucia.
Olufemi R AyeniDepartment of Surgery, McMaster University, Hamilton, ON, Canada.
Devin PetersonDepartment of Surgery, McMaster University, Hamilton, ON, Canada.
Mohit BhandariDepartment of Surgery, McMaster University, Hamilton, ON, Canada.
McMaster University · CAImpact · CAVictoria Hospital · INWestern University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere is currently no systematic review examining the effects of vitamin D supplementation among athletes. A rigorous systematic review and meta-analysis is important to provide a balanced view of current knowledge on the effect of vitamin D on serum 25-hydroxyvitamin D [25(OH)D] concentrations and physical performance.

objectivesThis systematic review of randomized controlled trials (RCTs) evaluated the effects of oral vitamin D supplementation on serum 25(OH)D concentrations and physical performance in athletes.

methodsMultiple electronic databases were searched, and study eligibility, methodological quality assessment, and data extraction were completed independently and in duplicate. Studies were stratified by baseline vitamin D sufficiency, season, and latitude. A cut-off of 30 ng/ml (75 nmol/l) of 25(OH)D was used for sufficiency. Absolute mean differences (AMDs) between vitamin D and placebo using random effects analysis, and heterogeneity using Q statistic and I

resultsIn total, 13 RCTs (2005-2016) with 532 athletes (vitamin D 311, placebo 221) were eligible. A total of 433 athletes (vitamin D 244, placebo 189) had complete outcome data. Among athletes with baseline values suggesting insufficiency, vitamin D supplementation led to significant increases from 3000 IU (AMD 15.2 ng/ml; 95% CI 10.7-19.7, p < 0.0001, I

conclusionDespite achieving sufficiency in vitamin D concentrations from ≥3000 IU supplementation, physical performance did not significantly improve. Between-study heterogeneity was large, and well-designed RCTs examining the effect of vitamin D supplementation on serum 25(OH)D concentrations, physical performance, and injuries in different sports, latitudes, ethnicities, and vitamin D status are needed.

Indexed as

AthletesDietary SupplementsRandomized Controlled Trials as TopicAdolescentAdultAthletic PerformanceFemaleHumansMaleTandem Mass SpectrometryVitamin DYoung Adult25-hydroxyvitamin DVitamin D

Identifiers

PMID28577257
OpenAlexW2621133204

What OpenQuestion holds

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Read underepoch 390

Registered trials

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.