Lithium is a well-established treatment in psychiatry. The possibility that lithium from the environment may affect mental health has received little study. However, a recent study and an older report both suggest that higher levels of lithium in drinking water are associated with lower suicide rates. These intriguing data should provoke further research, which ultimately may benefit community mental health.

Previous research has suggested that prenatal testosterone exposure masculinises disordered eating by comparing opposite- and same-gender twins. The objective of the current study is to replicate this finding using a sample of 439 identical and 213 fraternal females, 461 identical and 344 fraternal males, and 361 males and 371 females from opposite-gender twin pairs. Disordered eating was compared across twin types using the Eating Disorder Inventory–2. Inconsistent with previous findings, a main effect of co-twin gender was not found. Our results raise questions about the validity of prior evidence of the impact of prenatal testosterone exposure on patterns of disordered eating.

In low-income countries, clinicians must seek strategies to improve treatment adherence that are non-resource intensive and easily integrated into existing treatment structures. We conducted a prospective observational cohort study to investigate the relationship of family engagement in treatment during hospitalisation with post-discharge appointment and medication adherence in 81 patients from a Nigerian psychiatric hospital. After controlling for gender, diagnosis, mental state at discharge, and marital status, family involvement was significantly associated with appointment (P=0.047) but not medication adherence (P=0.590). Studies are needed to determine whether interventions based on engaging families in treatment can improve post-discharge adherence in this setting.