Trial reportInternational journal of environmental research and public health2020
The Effect of Vitamin D
Trial report in International journal of environmental research and public health, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 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
15 citing papers in PubMed, 2 syntheses or guidelines pooled it, 21 citations in OpenAlex.
- Meta-Analysis of European Clinical Trials Characterizing the Healthy-Adult Serum 25-hydroxyvitamin D Response to Vitamin D Supplementation.Nutrients · 2023Pooled it
- Changes in Cytokines Concentration Following Long-Distance Running: A Systematic Review and Meta-Analysis.Frontiers in physiology · 2022Pooled it
- Single high-dose vitamin D supplementation impacts ultramarathon-induced changes in serum levels of bone turnover markers: a double-blind randomized controlled trial.Journal of the International Society of Sports Nutrition · 2025Trial
- Effect of supplementation with vitamin D on biochemical markers of iron status and erythropoiesis in older people: BEST-D trial.The British journal of nutrition · 2025Trial
- Ultra-Marathon-Induced Increase in Serum Levels of Vitamin D Metabolites: A Double-Blind Randomized Controlled Trial.Nutrients · 2020Trial
- Change in elevation predicts 100 km ultra marathon performance.Scientific reports · 2025Article
- The Effect of Vitamin D Consumption on Pro-Inflammatory Cytokines in Athletes: A Systematic Review of Randomized Controlled Trials.Sports (Basel, Switzerland) · 2024Review
- Nutrition, hydration and supplementation considerations for mountaineers in high-altitude conditions: a narrative review.Frontiers in sports and active living · 2024Review
- Review
- The IRONy in Athletic Performance.Nutrients · 2023Review
- Iron Status and Physical Performance in Athletes.Life (Basel, Switzerland) · 2023Review
- Immunologic, Anti-Inflammatory, and Anti-Muscle Damage Profile of Supplemented Vitamin DBiology · 2023Article
- Nutritional Compounds to Improve Post-Exercise Recovery.Nutrients · 2022Review
- The Consequences of Training and Competition to the Musculoskeletal System in Ultramarathon Runners: A Narrative Review.Frontiers in physiology · 2021Review
- Effect of Vitamin D Supplementation on Serum Hepcidin Levels in Non-Diabetic Chronic Kidney Disease Patients.Indian journal of nephrologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors at 6 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Deficiencies in iron and vitamin D are frequently observed in athletes. Therefore, we examined whether different baseline vitamin D
Indexed as
Identifiers
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.