DMAE bitartrate is a choline-like compound found in some dietary supplements. Unlike true choline precursors, DMAE does not reliably convert to choline or acetylcholine in the brain. Scientists have not yet explained its mechanism.
People sometimes take it to sharpen focus, alertness, or mood. The evidence backing these uses is thin.
Most users take it earlier in the day to avoid disrupting sleep. A caution: DMAE may worsen symptoms in those with depression or certain psychiatric conditions.