| what role does serotonin play in depression | 0.59 | 0.6 | 2821 | 43 | 87 |
| what has serotonin to do with depression | 1.06 | 0.4 | 3402 | 40 | 90 |
| how does serotonin affect depression | 0.34 | 0.5 | 8924 | 36 | 87 |
| what role does serotonin play | 1.98 | 0.9 | 9230 | 29 | 3 |
| serotonin in the brain and depression | 0.56 | 0.3 | 629 | 37 | 70 |
| does taking serotonin help with depression | 0.35 | 0.8 | 9109 | 42 | 6 |
| is serotonin linked to depression | 1.17 | 0.3 | 7986 | 33 | 82 |
| how does increasing serotonin help depression | 1.94 | 0.7 | 5309 | 45 | 39 |
| serotonin and depression connection | 1.37 | 0.5 | 2092 | 35 | 70 |
| serotonin plays a role in | 0.77 | 1 | 7096 | 25 | 3 |
| what is the role of serotonin | 1.23 | 1 | 4976 | 29 | 71 |
| is serotonin related to depression | 0.57 | 0.5 | 8950 | 34 | 18 |
| relationship between serotonin and depression | 0.93 | 0.4 | 8182 | 45 | 64 |
