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.

What It Covers

Researchers studied Vitamin D, K2, Magnesium and Zinc in this meta-analysis publication.

This 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.

Why It Was Studied

There 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.

Who the Included Studies Covered

By PubMed's age tags, the people studied were teenagers, young adults and adults, both men and women.

Multiple electronic databases were searched, and study eligibility, methodological quality assessment, and data extraction were completed independently and in duplicate.

How the Review Was Done

Studies were stratified by baseline vitamin D sufficiency, season, and latitude.

Absolute mean differences (AMDs) between vitamin D and placebo using random effects analysis, and heterogeneity using Q statistic and I 2 index, were calculated.

What Was Measured

Topics PubMed links to this paper include Athletes, Athletic Performance, Dietary Supplements, Randomized Controlled Trials as Topic, Tandem Mass Spectrometry and Vitamin D.

What This Means in Plain Language

This is a meta-analysis of Vitamin D, K2, Magnesium and Zinc.

Results are reported in around 8 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 2017 (Sports medicine (Auckland, N.Z.)), a journal based in New Zealand.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.