Effects of vitamin D3 supplementation for 12 weeks on serum levels of anabolic hormones, anaerobic power, and aerobic performance in active male subjects: A randomized, double-blind, placebo-controlled trial.

What Was Tested

Researchers studied Vitamin D, K2, Magnesium and Zinc in this randomized controlled trial publication.

The present study aimed to investigate the effect of vitamin D3 supplement on serum levels of anabolic hormones, cortisol, anaerobic and aerobic performance in active males.

Why It Was Studied

Maintenance of the serum 25-hydroxyvitamin D (25-OH-D) concentration at recommended levels is essential due to its role in the regulation of anabolic hormones and athletic performance.

However, the results of the clinical experiments in athletes are controversial.

Who Took Part

The age groups tagged for this paper are young adults, men only.

How the Study Was Run

In design terms this was a randomized, double-blind and placebo-controlled study.

Because people in this Vitamin D, K2, Magnesium and Zinc study were split into groups at random, differences between the groups are less likely to reflect who happened to join each one.

As a double-blind Vitamin D, K2, Magnesium and Zinc study, the assignments were hidden from both participants and investigators until the end.

A placebo (an inactive look-alike) gave the Vitamin D, K2, Magnesium and Zinc group a baseline to be compared against.

The Wingate test, VO2max, and serum levels of 25-OH-D, Parathyroid hormone (PTH), total testosterone, growth hormone (GH), Insulin-like growth factor-1 (IGF-1), and cortisol were assessed.

What Was Measured

Maintenance of the serum 25-hydroxyvitamin D (25-OH-D) concentration at recommended levels is essential due to its role in the regulation of anabolic hormones and athletic performance.

The subject headings attached to it are Aerobiosis, Anaerobiosis, Analysis of Variance, Athletic Performance, Body Mass Index, Cholecalciferol and Exercise.

Author keywords: VO2max, anabolic hormones, average power, cortisol, fatigue index and peak power.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Vitamin D, K2, Magnesium and Zinc.

The publication is from 2020 (European journal of sport science), a journal based in Germany.

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