Trial reportEuropean journal of nutrition2017
Vitamin D
Trial report in European journal of nutrition, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 7 of them syntheses that pooled 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.
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.
Who cites it
29 citing papers in PubMed, 7 syntheses or guidelines pooled it.
- Effects of dietary supplements on lower-limb power and jump performance in physically active individuals and athletes: a systematic review and Bayesian network meta-analysis.Journal of the International Society of Sports Nutrition · 2026Pooled it
- Effects of vitamin D3 supplementation on strength of lower and upper extremities in athletes: an updated systematic review and meta-analysis of randomized controlled trials.Frontiers in nutrition · 2024Pooled it
- Effects of vitamin D supplementation on maximal strength and power in athletes: a systematic review and meta-analysis of randomized controlled trials.Frontiers in nutrition · 2023Pooled it
- Vitamin D Supplementation Improves Handgrip Strength in Postmenopausal Women: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Frontiers in endocrinology · 2022Pooled it
- A systematic review and meta-analysis of the response of serum 25-hydroxyvitamin D concentration to vitamin D supplementation from RCTs from around the globe.European journal of clinical nutrition · 2019Pooled it
- Effect of vitamin D supplementation on upper and lower limb muscle strength and muscle power in athletes: A meta-analysis.PloS one · 2019Pooled it
- 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.Sports medicine (Auckland, N.Z.) · 2017Pooled it
- Eight-Week Vitamin DNutrients · 2026Trial
- Trial
- Effect of vitamin DJournal of the International Society of Sports Nutrition · 2023Trial
- Trial
- Influence of Vitamin D Supplementation by Sunlight or Oral D3 on Exercise Performance.Medicine and science in sports and exercise · 2018Trial
- Impact of Vitamin D Status on Speed, Power, and Sport-Specific Skills in Young Soccer Players Living Above 55° North Latitude.Journal of bone metabolism · 2026Article
- Sub-Optimal Nutritional Knowledge and Dietary Intake in Gaelic Team Sport Athletes: Limited Associations Between Knowledge and Dietary Adequacy.Nutrients · 2026Article
- Effects of 21-day vitamin D supplementation on sports performance and exercise-induced inflammation: a randomized double-blind trial.Frontiers in physiology · 2026Article
- Article
- Influences of Vitamin D and Iron Status on Skeletal Muscle Health: A Narrative Review.Nutrients · 2022Review
- Implementation strategies for improving vitamin D status and increasing vitamin D intake in the UK: current controversies and future perspectives: proceedings of the 2nd Rank Prize Funds Forum on vitamin D.The British journal of nutrition · 2022Article
- An investigation of dietary intake, nutrition knowledge and hydration status of Gaelic Football players.European journal of nutrition · 2021Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeVitamin D inadequacy is a global health concern in athletes as well as the general population. Whilst the role of vitamin D in skeletal health is well defined, there remains uncertainty over whether vitamin D supplementation has an added benefit beyond bone health.
methodsThis randomised placebo-controlled trial in healthy male and female Gaelic footballers (n = 42) investigated the effect of vitamin D
resultsSupplementation significantly increased total 25-hydroxyvitamin D concentrations compared to the placebo group (mean ± SD change from baseline, 36.31 ± 32.34 vs. 6.11 ± 23.93 nmol/L, respectively; P = 0.006). At baseline, 50 and 22 % of footballers presented with vitamin D insufficiency (31-49 nmol/L) and deficiency (<30 nmol/L), respectively. Total 25-hydroxyvitamin D concentration did not significantly correlate with any measure of physical performance. Analysis of covariance (ANCOVA) models demonstrated that vitamin D supplementation over 12 weeks had no significant effect on VO
conclusionsTwelve-week daily supplementation with 3000 IU (75 µg) vitamin D
Indexed as
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What OpenQuestion holds
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.