From Neuropharmacology, which has an impact factor of 5.1. "Furthermore, a causal relationship between Mg2+ and anxiety is suggested in mice with low plasma Mg

From Neuropharmacology, which has an impact factor of 5.1. "Furthermore, a causal relationship between Mg2+ and anxiety is suggested in mice with low plasma Mg2+ levels which display increased anxiety- and/or depression-related behaviour..." http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3198864/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3198864/