Most recent research supports lower dose Lithium (mineral) as having not only beneficial effects on mood (mild to moderate depression and anxiety), but also serving as a protective/promotive factor to brain cells. Li is possibly preventing Alzeimer's and Parkinson's b/c it's ability to slow down programed cell death - also, some reports that it actually can rebuild some gray matter... It metabolizes through kidneys so it's perfect for someone with Hepatitis or other liver disease. Overall, very good and valuable product.