Obsessive-compulsive disorder may be linked to levels of a (brain chemical serotonin).Logical formLearned from2 sentences. An amount of serotonin may slosh around (brain circuits).Logical formLearned from2 sentences. A difference can be a level of serotonin.Logical formLearned from2 sentences. Production of serotonin may help (control impulses).Logical formLearned from2 sentences. A (serotonin production mechanism) can be deficient.Logical formLearned from2 sentences. A drug may prevent serotonin.Logical formLearned from2 sentences. (Serotonin levels) may rise.Logical formLearned from2 sentences. A (neurotransmitter serotonin) may undergo a re-absorption.Logical formLearned from2 sentences. A gut may be loaded with a (neurotransmitter serotonin).Logical formLearned from2 sentences. (Consuming sugar) may raise a (brain serotonin).Logical formLearned from2 sentences. (Serotonin levels) can be in hamsters.Logical formLearned from2 sentences. A measure can be constituted-of-or-filled-with (serotonin function).Logical formLearned from2 sentences. A (brain circuitry) can be for serotonin.Logical formLearned from2 sentences. Serotonin may help.Logical formLearned from2 sentences. A connection can be between serotonin.Logical formLearned from2 sentences.