Simplify the following text for a Grade 8 native English-speaking person.
Original: Lithium salts such as lithium carbonate ( Li2CO3 ) , lithium citrate , and lithium orotate are mood stabilizers . They are used in the treatment of bipolar disorder since , unlike most other mood altering drugs , they counteract both depression and mania ( though more effective for the latter ) .
Simplified: Lithium compounds are used in some drugs known as mood stabilizers .