Caffeine
Most true teas, derived from the leaves of camellia sinesis, contain a lesser or greater amount of caffeine. Tisanes generally contain no caffeine. Most of the caffeine in tea is released in the first 30 to 60 seconds following infusion. Thus, you can decaffeinate tea at home by steeping your tea for less for 30 second pouring out the liquor and pouring on fresh water. The infusion reduce the caffeine content by more than 80% less than if infused normally.
While some teas have substantial caffeine, here is how it stacks up with other beverages:
| Beverage | Caffeine (mg) |
|---|---|
| Coffee 5 oz | |
| Drip | 115 |
| Percolated | 80 |
| Instant | 65 |
| Decaffeinated | 3 |
| Espresso 2 oz | 60-90 |
| Tea | |
| Green 5 oz | 15 |
| Black 5 oz | 40 |
| Decaffeinated | 5 |
| Iced 12 oz | 70 |
| Soft Drinks 12 oz | |
| Coca-Cola | 46 |
| Pepsi-Cola | 38 |
Source: Food and Drug Administration/National Soft Drink Association