Sources: Physicians Desk Reference and Institute of Food Technologies from Pafai and Jankiewicz (1991) DRUGS AND HUMAN BEHAVIOUR
| Cocoa | 250mg theobromine |
| Bittersweet choc. bar | 130mg theobromine |
| 5 oz cup brewed coffee | no theobromine |
| Tea 5oz cup brewed 3min with teabag | 3-4 mg theophylline |
| Diet Coke | no theobromine or theophylline |