This journal uses their publisher’s own license.

Fluoride is available as a free online open access journal at www.fluorideresearch.online and the articles can be accessed by clicking on the links below the titles in the online table of contents.

This study was supported by the statutory budget of the Department of Physiology, Institute of Life Sciences, University of Szczecin, and the Department of Biochemistry and Human Nutrition, Pomeranian Medical University, in Szczecin, Poland.