About the Authors

Lindsy Kass

Contributed equally to this work with: Lindsy Kass, Andrea Rosanoff

l.s.kass@herts.ac.uk

Affiliation University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom

Andrea Rosanoff

Contributed equally to this work with: Lindsy Kass, Andrea Rosanoff

Affiliation Center for Magnesium Education & Research, Pahoa, Hawaii, United States of America

Amy Tanner

‡ These authors also contributed equally to this work

Affiliation University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom

Keith Sullivan

‡ These authors also contributed equally to this work

Affiliation University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom

William McAuley

‡ These authors also contributed equally to this work

Affiliation University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom

Michael Plesset

‡ These authors also contributed equally to this work

Affiliation Center for Magnesium Education & Research, Pahoa, Hawaii, United States of America

Competing Interests

In the future, Dr Andrea Rosanoff may receive royalties on a magnesium cream for which she has signed an agreement. The cream in which she will have an interest is different than the one used in this pilot study as the magnesium concentration is more than double that used in the pilot study and it is a different formulation. The name of the cream is Natural Calm Cream. The U.S. Patent title is: Cream Transdermal Magnesium Supplement. Publication No. US-2016-0317576-A1. Publication Date: 11/03/2016. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: LK AR. Data curation: LK. Formal analysis: LK AR MP KS. Investigation: LK. Methodology: LK AR. Project administration: LK. Resources: LK AR. Supervision: LK. Validation: LK AR. Visualization: LK AR. Writing – original draft: LK AR AT WM. Writing – review & editing: LK AR MP.