Vitamin D supplementation for the prevention of type 2 diabetes in overweight adults: study protocol for a randomized controlled trial.

What Was Tested

The paper reports a study of Vitamin D, K2, Magnesium and Zinc, published as a randomized controlled trial.

While the importance of vitamin D for bone mineralization is well known, its role as a protective agent against chronic diseases, such as type 2 diabetes and cardiovascular disease, is less understood.

Who Took Part

PubMed indexes the participants as teenagers, young adults, adults and middle-aged adults, both men and women.

At baseline, participants will undergo a medical review and anthropometric measurements, including dual X-ray absorptiometry, an intravenous glucose tolerance test, muscle and fat biopsies, a hyperinsulinemic euglycemic clamp, and questionnaires assessing diet, physical activity, sun exposure, back and knee pain, and depression.

All measurements will be repeated at follow-up, with the primary outcome measure expressed as a change from baseline in insulin sensitivity and secretion for the intervention group compared with the placebo group.

How the Study Was Run

The design is described as randomized and placebo-controlled.

Random assignment meant chance, not the researchers, decided who got Vitamin D, K2, Magnesium and Zinc and who got the comparison, which limits bias.

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

Secondary outcome measures will compare changes in anthropometry, cardiovascular risk factors, and inflammatory markers.

What Was Measured

PubMed files the paper under topics including Biomarkers, Cholecalciferol, Clinical Protocols, Diabetes Mellitus, Type 2, Dietary Supplements, Glucose Clamp Technique and Glucose Tolerance Test.

What This Means in Plain Language

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

Its findings take up roughly 1 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2015 (Trials), a journal based in England.

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