Used primarily in the treatment of bipolar disorder as a mood stabilizer. It helps reduce the severity and frequency of manic episodes and may also be effective in managing depressive phases. The citrate form offers good bioavailability and is sometimes preferred for its gentler effect on the gastrointestinal system compared to other lithium salts. Commonly administered in tablet or liquid form, it requires careful dosage monitoring due to lithium's narrow therapeutic index. Also used in some cases as a source of lithium in nutritional supplements and in research settings for studying lithium's biological effects.