Lithium

According to Table 1 (p. 108) of Schrauzer et al. (1990, https://scholar.google.com/scholar?q=Lithium+in+drinking+water+and+the+incidences+of+crimes%2C+suicides%2C+and+arrests+related+to+drug+addictions&btnG=&hl=en&as_sdt=0%2C5), There was no statistically significant difference between low-Lithium (0-12 mcg Li/L) counties and medium-Lithium (13-60 mcg Li/L) counties of Texas in suicide rates (14.2, 14.8 per 100,000 person-year,