| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what is endogenous opioids | 1.57 | 0.3 | 1034 | 36 | 26 |
| what | 1.15 | 0.9 | 6709 | 68 | 4 |
| is | 1.86 | 0.6 | 5243 | 15 | 2 |
| endogenous | 0.63 | 1 | 7306 | 47 | 10 |
| opioids | 0.83 | 0.9 | 1755 | 4 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what is endogenous opioids | 0.25 | 0.4 | 9479 | 36 |
