| The following resources offer information about energy drinks and other sources of caffeine. |
| National Institutes of Health, MedlinePlus, Caffeine in the Diet Go Ask Alice!, Guarana vs. caffeine? Go Ask Alice!, Caffeine’s effects on health |
| The following resources offer information about energy drinks and other sources of caffeine. |
| National Institutes of Health, MedlinePlus, Caffeine in the Diet Go Ask Alice!, Guarana vs. caffeine? Go Ask Alice!, Caffeine’s effects on health |