| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| caffeine and the effects on the heart | 0.79 | 0.3 | 4541 | 30 |
| effects of caffeine on heart rate | 0.95 | 0.5 | 6108 | 82 |
| negative effects of caffeine on the heart | 0.93 | 0.7 | 6484 | 76 |
| effects of caffeine on the heart | 1.91 | 0.1 | 6337 | 95 |
| caffeine and its effects on the heart | 0.14 | 0.7 | 5331 | 11 |
| short term effects of caffeine on the heart | 1 | 0.5 | 4788 | 6 |
| long-term effects of caffeine on the heart | 1.46 | 0.4 | 4035 | 14 |
| effect of caffeine on heart rate experiment | 1.96 | 1 | 6390 | 23 |
| effect of caffeine on heart rate of daphnia | 1.89 | 0.4 | 1322 | 93 |
| effects of caffeine on daphnia heart rate | 1.48 | 0.4 | 226 | 63 |
| the effect of caffeine on heart rate | 1.67 | 0.8 | 8821 | 31 |
| what is the effect of caffeine on heart rate | 1.6 | 0.6 | 3516 | 62 |
