Supplemented zinc does not alter mood in healthy older European adults--a randomised placebo-controlled trial: the Zenith study.

What Was Tested

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

Older people are vulnerable to zinc deficiency, which may impact upon their mood.

Who Took Part

The age groups tagged for this paper are middle-aged adults, older adults and people over 80, both men and women.

Healthy volunteers (n 387) aged 55-87 years were recruited.

Volunteers in Rome (Italy; n 108) and Grenoble (France; n 91) were aged 70-87 years and those in Coleraine (Northern Ireland; n 93) and Clermont-Ferrand (France; n 95) were aged 55-70 years.

How the Study Was Run

The researchers set it up as 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.

Some participants received a placebo instead of Vitamin D, K2, Magnesium and Zinc, giving a reference point.

What Was Measured

PubMed files the paper under topics including Affect, Dietary Supplements, Europe, Trace Elements and Zinc.

What This Means in Plain Language

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

Results are reported in around 2 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 2011 (Public health nutrition), a journal based in England.

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