| coffee | 0.75 |
| tea | 0.75 |
| chocolate | 0.72 |
| cola | 0.65 |
| energy drinks | 0.65 |
| soda | 0.64 |
| coffee beans | 0.63 |
| cocoa | 0.62 |
| soft drinks | 0.62 |
| green tea | 0.60 |
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| increase blood pressure | 0.61 |
| improve performance | 0.60 |
| enhance fat burning | 0.60 |
| affect the brain | 0.59 |
| increase alertness | 0.59 |
| boost metabolism | 0.59 |
| increase heart rate | 0.58 |
| restrict blood vessels | 0.57 |
| increase fat burning | 0.55 |
| stay in the body | 0.54 |
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| insomnia | 0.52 |
| headache | 0.52 |
| anxiety | 0.51 |
| modest weight loss | 0.51 |
| nervousness | 0.51 |
| jitter | 0.51 |
| dependence | 0.49 |
| sleeplessness | 0.47 |
| stomach irritation | 0.46 |
| dehydration | 0.42 |
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| beverage | 0.66 |
| food | 0.63 |
| effect | 0.60 |
| coffee | 0.60 |
| product | 0.59 |
| positive effect | 0.54 |
| impact | 0.44 |
| same effect | 0.43 |
| benefit | 0.42 |
| negative effect | 0.42 |
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| osteoporosis | 0.31 |
| improvement | 0.26 |
| condition | 0.24 |
| indigestion | 0.21 |
| adrenal exhaustion | 0.18 |
| poorer quality decisions | 0.16 |
| bmi | 0.16 |
| brittle bones | 0.16 |
| ulcer | 0.16 |
| stimulant | 0.68 |
| a central nervous syste… | 0.62 |
| drug | 0.61 |
| stimulant drug | 0.55 |
| the most widely used dr… | 0.51 |
| substance | 0.50 |
| mild stimulant | 0.49 |
| natural stimulant | 0.49 |
| alkaloid | 0.48 |
| psychoactive drug | 0.47 |
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| absorbed | 0.65 |
| removed | 0.65 |
| extracted | 0.61 |
| absorbed into the blood… | 0.61 |
| consumed | 0.59 |
| consumed in moderation | 0.58 |
| metabolized | 0.57 |
| metabolized in the liver | 0.55 |
| avoided | 0.54 |
| consumed in tea | 0.53 |
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| theophylline | 0.39 |