Caffeine
other Unit: mg
Caffeine is a naturally occurring methylxanthine and the world's most widely consumed psychoactive compound. It works primarily by blocking adenosine receptors in the brain, promoting alertness and reducing perceived fatigue. Moderate intake — up to 400 mg per day for healthy adults — is generally recognized as safe; higher amounts can cause anxiety, elevated heart rate, and sleep disruption. Coffee, tea, energy drinks, and chocolate are the main dietary sources.
Reference Daily Intake · per 100g
USDA/NIH DRI · National Academies
Top 20 Foods by Caffeine
See all 289 foods →Reference Daily Intake
No established RDA for this nutrient.
| # | Food | per 100g |
|---|---|---|
| 1 | Unsweetened Instant Tea Powder | 5714.0 mg |
| 2 | Instant Coffee Powder | 3142.0 mg |
| 3 | Instant Lemon Tea with Saccharin Powder | 2240.0 mg |
| 4 | Instant Coffee with Chicory | 2063.0 mg |
| 5 | Instant Lemon Tea Unsweetened | 1794.0 mg |
| 6 | Half-Caffeine Instant Coffee | 1571.0 mg |
| 7 | Dark Chocolate Coated Coffee Beans | 839.0 mg |
| 8 | Milk Chocolate Coated Coffee Beans | 800.0 mg |
| 9 | Sweetened Mocha Instant Coffee | 360.0 mg |
| 10 | Unsweetened Cocoa Powder | 230.0 mg |
| 11 | Espresso | 212.0 mg |
| 12 | Instant Decaffeinated Unsweetened Tea | 169.0 mg |
| 13 | Instant Lemon Tea with Ascorbic Acid | 124.0 mg |
| 14 | Decaffeinated Instant Coffee Powder | 122.0 mg |
| 15 | Dark Chocolate (60-69% Cacao) | 86.0 mg |
| 16 | Unsweetened Baking Chocolate Squares | 80.0 mg |
| 17 | Dark Chocolate (70-85% Cacao) | 80.0 mg |
| 18 | Unsweetened Cocoa Powder (Alkali Processed) | 78.0 mg |
| 19 | Cocoa Powder (Hi-Fat, Alkali Processed) | 72.0 mg |
| 20 | Sweet Chocolate | 66.0 mg |