Proper Name: Germanium Sesquioxide 

Common Name: Organic Germanium

Evidence of Efficacy: statement to the effect of Germanium deficiency or imbalance may play a role in the symptoms of mood disorders. Observational and experimental studies have shown an association between germanium and depression¹.                  

References:

1. Tanaka, T.; Treatment of depressive psychosis. In K. Asai (Ed.), Organic Germanium . Tokyo: Japan Publications, Inc. 1980.